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PARTICLE PHYSICS SUMMARY*
A Digest of the 1996 Review of Particle Physics
Particle Data Group
R.M. Barnett, C.D. Carone, D.E. Groom, T.G. Trippe, and C.G. Wohl
Technical Associates: B. Armstrong, P.S. Gee, and G.S. Wagmant
Physics Division, Lawrence^ Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94780, USA
I". James, M. Mangano, K. Monig, and L. Montanet
CERN, European Laboratory for Particle Physics, CH-1211 Geneve 88, Switzerland
3.L. I"eng~ and H. Murayama
Physics Division, Laurence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA;
and Department of Physics, University of California, Berkeley, CA 94720, USA
3.3. Hernandez
IFIC —Instituto de Fi'sica^ Corpuscular, Universitat de Valencia —C.S.I.C., E-46100 Burjassot, Valencia, Spcin; and CERN
A. Manohar
Departmenf. of Physics, University of California at San Diego, La Jolla, CA 92098, USA
M. Aguilar-Benitez
C.I.E.M. A. T., E-28040, Madrid, Spain; and CERN
C. Casa
Dipcrtimento di Fisica e INFN, Universita di Genova, I-16146 Genova, Italy
R.L. Crawford
Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland
M. Roos
Physics Department, , PB 9, FIN-00014 University of Helsinki, Finland
N. A. Tornqvist
Resecrch Institute of High Energy Physics, PB 9, FIN-00014 University of Helsinki, Finland
K.G. Hayes
Department of Physics, Hillsdcle College, Hillsdale, MI 49942, USA
K. Hagiwara, K. Nakamura, and M. Tanabashi
KEK, National^ Laboratory for High Energy Physics, Oho, Tsukuba-shi,^ Ibaraki-ken^ 805, Japan
K. Olive
School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
K. Honscheid
Department of Physics, Ohio State University, Columbus, OH 4M10 USA
P.R. Burchat
Department of Physics, Stanford University, Stanford, CA 94805, USA
R.E. Shrock
Institute (^) for Theoretical Physics, State University (^) of ¹mYork, (^) Stony Brook, NY (^) 11794, USA
S. Eidelman
Insfifufe of Nuclear Physics, SU-680090, Novosibirsk, Russia
R.H. Schindler
Stanford Linear^ Accelerator^ Center, Stanford, CA 94809, USA
A. Gurtu
Tata Institute of Fundamental Research, Bombay 400 005, India; and CERN
K. Hikasa
Physics Department, Tohoku Universify, Aoba-ku, Sendai 980-77, Japan
G. Conforto
Universita, degli Studi, I-61029 Urbino, Italy; Istituto Nazioncle di Fisica Nucleare, Sezione di Firenze, I-501M Firenze, Italy
R.L. Workman
Departmenf, of Physics, Virginia Polytechnic Institute cnd State University, Blccksburq, VA 24061, USA
C. Grab
Institute for High Energy Physics, ETH-Honggerberg, CH-8098 Zurich, Sujitzerland
C. Amsler
Institute of Physic, s, University of Zci'rich, CH-8057 Zurich, Switzerland
Abstro, et
This report summarizes the highlights of the 1996 Revietv of Particle Physics (Phys. Rev. D54, 1 (1996)). Using
data from previous editions, plus 1900 new measurements from 700 papers, we list, evaluate, and average measured
properties of gauge bosons, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles
such as Higgs bosons, heavy neutrinos, and supersymmetric particles. We also give numerous reviews, tables, figures,
and formulae. The present edition marks the apparent completion of the table of Standard Model quarks with the
discovery of the top. A booklet is available containing the Summary Tables and abbreviated versions of some of the
other sections of the full Reviem
*The publication of the Review of Particle Physic:s is supported by the Director, OfEce of Energy Research, Office of High Energy and Nuclear
Physics, the^ Division^ of^ High^ Energy Physics^ of^ the^ U.S.^ Department^ of^ Energy under^ Contract^ No.^ DE—AC03^ —76SF00098;^ by the^ U.S.^ National
Science Foundation under Agrecmcnt No. PHY-9320551; by thc European Laboratory for Particle Physics (CERN); by an implementing
arrangcmcnt between thc governments of Japan (Monbusho) snd the United States (DOE) on cooperative rcscarch and development; and by thc
Italian National Instituto of Nuclear Physics (INFN).
tDcccascd. A tribute to Gary Wagman may be found in Phys. Rcv. D54, 3 (1996) or visit, our WWW memorial on
http: //pdg. lbl.^ gov/wagman memorial.^ html.
~Jonathan Feng acknowleges support from the Miller Institute for Basic Research in Science.
Special thanks are due to our administrative assistant at LBNL, Cail Harper, for her careful proofreading of the text, layout,
and graphics in this Reviem
INTRODUCTION
The Review of Particle Physics and the abbreviated
version, the Particle Physics Booklet, are reviews of the
field of Particle^ Physics. This^ complete Review^ includes^ a
compilation/evaluation of data on^ particle properties, called
the "Particle Listings.
These Listings include 1900 new
measurements from^700 papers, in^ addition^ to^ the^ 14,^000
measurements from 4000 papers that first appeared in
previous editions.
Both books include Summary Tables with^ our best^ values
and limits for particle properties such as masses, widths^ or
lifetimes, and branching fractions, as well as an extensive
summary of searches for hypothetical particles. In addition,
we give a long section of "Reviews, Tables, and Plots"^ on a
wide variety of theoretical and experimental topics, a quick
reference for the practicing particle physicist.
The Review and the Booklet are published in even-
numbered years. This edition is an updating through
December 1995 (and, in some areas, well^ into^ 1996). As
described in the section "Using Particle Physics Databases"
following this^ introduction, the^ content^ of^ this^ Review^ is
available on the World-Wide Web, and is updated between
printed editions (http: //pdg. 1bl. gov/).
The Summary Tables give our best values of the
properties of^ the^ particles we^ consider^ to^ be^ well^ established,
a summary of search^ limits^ for^ hypothetical particles, and^ a
summary of experimental tests of conservation laws.
The Particle Listings contain all the data used to get the
values given in the Summary Tables. Other measurements
considered recent enough or important enough to mention,
but which for one^ reason^ or another^ are^ not^ used^ to^ get
the best values, appear separately just beneath the data we
do use for the Summary Tables. The Particle Listings also
give information on unconfirmed particles and on particle
searches, as well as short "reviews"^ on subjects oI'^ particular
interest or controversy.
The Particle Listings were once an archive of all
published data on particle properties. This is no longer
possible because of the large quantity of data. We refer
interested readers to earlier editions for data now considered
to be obsolete.
We organize the particles into six categories:
Gauge and^ Higgs bosons
Leptons
Quarks
Mesons
Baryons
Searches for^ monopoles,
supersymmetry, compositeness, etc.
The last category only includes searches for particles that
do not belong to the previous groups; searches for heavy
charged leptons and^ massive^ neutrinos,^ by contrast,^ are^ with
the leptons.
The accuracy and usefulness of this Review depend in
large part on interaction between its users and the authors.
We appreciate comments, criticisms, and suggestions
for improvements of any kind. Please send them to the
appropriate author, or to the LBNL addresses below,
To order a copy of the Review or the Particle Physics
Booklet from North and South America, Australia, and the
Far East, write to
Particle Data Group, MS 50-
Lawrence Berkeley National Laboratory
Berkeley, CA^ 94720, USA
or send e-mail to PDGCLBL. GOV.
To order more than one copy of the Review or booklet,
write to
c/o Anne^ F'leming
Technical Information Division, MS 508-
Lawrence Berkeley National Laboratory
Berkeley, CA^ 94720, USA
or send e-mail to ASFLEMINGLBL. GOV.
From all other areas, write to
CERN Scientific Information Service
CH-1211 Geneva 23
Switzerland
or via the WWW from CERN (http: //www. cern. ch)
ScientiGc Information Service
Grdering CERN publications
Gauge 8c (^) Higgs Boson (^) Summary Table
Particle Data Group
R.M. Barnett, C.D. Carone, D.E. Groom, T.G. Trippe, C.G. Wohl,
B. Armstrong, P.S. Gee, G.S. Wagman't, F. James, M. Mangano,
K. Monig, L. Montanet, J.L. Feng, H. Murayama, J.J. Hernandez,
A. Manohar, M. Aguilar-Benitez, C. Caso, R.L. Crawford, M. Roos,
N. A. Tornqvist, K.G. Hayes, K. Hagiwara, K. Nakamura, M. Tanabashi,
K. Olive, K. Honscheid, P, R. Burchat, R.E. Shrock, S. Eidelman,
R.H. Schindler, A. Gurtu, K. Hikasa, G. Conforto, R.L. Workman,
C. Grab, and C. Amsler
*Technical Associate
f Deceased
(Approximate closing^ date^ for^ data:^ January 1, 1996)
GAUGE AND HIGGS BOSOMS
I(J C)^0 1(1 )
Mass m & 6 x 10 eV, CL = 99.7%
Charge (^) q( 5x10 e
Mean life ~ =^ Stable
or gluon
I(JP) =^ 0(
Mass m =^0 [al
SU(3) color octet
SUMMARY TABLES OF PARTICLE PROPERTIES
July 1996
Z DECAY MODES Fraction (I;/I )
Charge = 0
Mass m =^ 91.187.+ 0. 007 GeV [^ ]
Full width I =^ 2. 490 + 0. 007 GeV
I (7+ 7 ) = 83. 83 + 0. 27 MeV I^ I
I (invisible) =^ 498. 3 + 4. 2 MeV Iel
I (hadrons) =^ 1740. 7 + 5. 9 MeV
I (y+y, )/I (e+e ) =^ 1. 000 + 0. 005
I (~ ~ )/I (e+ e ) = 0. 998 + 0. 005 I'I
Average charged multiplicity
(Ncharged) =^20 99 +^0
Couplings to leptons
g~ = -0. 0376 + 0. 0012
g~ —
gv, 053 + 009
g"~ = 0. 502 + 0. 017
Asymmetry parameters [~]
Ae =^ 0.^156 +^ 0.^008 (5 =^ 1.2)
A~ =^ 0.^145 +^ 0.^009
Ac =^ 059+0. 19
At, ——0.^89 +^ 0.^11
Charge asymmetry {%}et Z pole
AFH ——1.^59 +^ 0.^18
A~g
FZ —9.^92 +^ 0.^35
P Confidence level (^) (MeV/c)
W+ DECAY MODES
P
Fraction (I;/I ) Confidence level (MeV/c)
I+V
e+ v
P+ V
V hadrons
[t] (10.8+0.4) %
(1o.9+1.o) %
5 x 10 4
40110 40110 40110 40110
95% 40110
Charge =^ +1 e
Mass m =^ 80.33+ 0. 15 GeV
mz —ml/I/ =^ 10.^85 +^ 0.^15 GeV
m~+ —m~ ———0.^2 +^ 0.^6 GeV
Full width I = 2. 07 + 0. 06 GeV
W modes are charge conjugates of the modes below.
e+ e-
m+~
r+r
g+ g-
invisible hadrons
( urj+^ cc^ )/
(dd+ss+bb) /
CC
bb
'ri (^) y (d (^) y
g'(958) ~
'y (^) y y'y (^) y
~+ w+
p+ W+
2/@(1S)X
@(2S)X
X,g(1P)X
TX
(Do/Oo) X
0+X
O'(2010)+ X
BoX
anomalous p+ hadrons
e+e
P P
r+T 7
g+ g-^ &&
VVy (^) y
e+ p+
e+r+
p+r+
LF LF LF
( 3 366+0^ 008}^ 0/
( 3 367+0.013)^ %
( 3 360+0.^015
[b] ( 3.366+0.006) %
( 9.^6 +1.^3 ) %
- 2 x 10
- 1 x 10
6. 5 x1O —^4
- 2 x 10
- 2 x 10
1. 0 x 10
[g]& 7 x^10
[g] &^ s.^3 x^10
( 3.^80 +0.^27 ) x^10
( 1.^60 +0.^33 ) x^10
( 6.^0 +1.^9 ) x^10
( 1O^ +0.^5 }x^ 1O-
[gJ (11.^4 +1.^3 ) %
seen [h] & 3. 2 x 10 [h] & 5.^2 x 10
[h] & s6^ x 10
[h] & 7.^3 x 10
[i] & 68 x 10 6
[i] & s.s x 10 6
[i] & 3.^1 x 10 6 [gJ &^ 1.^7 x1O^
[g] &^ 9.^8 x^10
[g] &^ 1.^7 x^10
45600 45600 45600 45600
95% 45600 95% 45600 95% 45600 95% 45600 95% 45600 95% 45600 95% 10300 95% 10300
95% 95% 45600 9S% 4S6OO 95% 45600 9S% 4S6OO 9S% 95% 45600 95% 45600 95% 45600 95% 45600
Lepton Summary Table
LEPTONS
J=p^1
Mass rn =^ 0. 51099907 6 0. 00000015 MeV [ ]
= (5, 48579903 + 0.00000013) x 10 4 u
(m+ —m^ )/m( 4x10,^ CL=90% ~q, ,^ +^ q, ~/e^ (^ 4x^
10-a
Magnetic moment JLt, =^ 1. 001159652193 6 0. 000000000010 ps
ge+ ge-) / gav«age —
( —0.^5 +^ 2.1}x^10
Electric dipole moment d =^ (—0. 3 + 0.8} x 10 ecrn
Mean life ~ ) 4. 3 x^10 yr, CL =^ 68% [^ ]
DECAY MODES
e vevp
e ve
e VeVpe+e
Fraction (I (^) I/I )
f] {14+0^4
fg] (3.4+0.4)^ x^ 10—
P Confidence level (MeV/c) 53 53 53
e Vevp
e
e- e+e-
e 2'y
Lepton Family number^ (LF) violating modes
LF (^) [h] ( 12
& 4.^9 x^ 1Q^
I F & 1o x1o-'
10
90% 90% 90% 900/
53 53 53 53
J=p^1
Mass m = 105. 658389 + 0. 000034 MeV [c]
= 0. 113428913 + 0. 000000017 u
Mean life r =^ (2. 19703 + 0.00004) x 10 e^ s
+/7 =^ 1.^00002 6 0.^00008
n. = 658. 654 m
Magnetic moment p =^ 1. 001165923 6 0. 000000008 eh/2m„
(p + f ) / igaverage =^ ( 2.^6 +^ 1.6)^ x^10
Electric dipole moment d =^ (3. 7 6 3.4) x^10 ~a^ ecm
Decay parameters [d]
p =^ 0.^7518 +^ 0.^0026
g =^ —0.^007 +^ 0.^013
6 =^ 0. 749 + 0. 004
(P =^ 1.^003 +^ 0.^008 [^ ]
(P&b/p )^ 0.99682,^ CL^ =^ 90%^ [e]
g' = 1.00+ 0. 04
g" = 0.7+ 0. 4
cr/A =(0 +4) x 10
rxr/A =^ (0 + 4) x 10
P/A =^ (4 2 6) x^10
P'/A = (2+ 6} x io-
g =^ 0.^02 6 0.^08
p+ modes are charge conjugates of the modes below.
DECAY MODES Fraction (^) (I I/f )
Scale factor/ (^) p Confidence level (MeV/c)
Modes with
particle &^0 neutrals &^ OKQL v
("1-prong" )
particle &^0 neutrals &^ OK v
P Vpv~ P Vpvq
(E~ &^37 MeV)
e vev
h &^0 neutrals &^ OKL v
t- &OK', v.
h v~ 7l V9-
K v~
h- &1~0V
h-~0 v
'7r (^) 7I 0 V9-
~0 non-p(770) v
K-~ov
h- & 2~0V
h 2' v~
h 2' v (ex.K )
vr 2n v (ex.K )
K 2~0V^ (ex.KQ)
h &^ 3' v~
h-3~0 v
rr 3rrov^ (ex.Ko)
K 3x v, (ex. K )
h 4rrov (ex.Ko)
h 4rro^ v~ (ex.Ko,^ q)
K )1(x orK (^) } v
one charged partide
[I] {1735+^0
( 23 4 10 ) x^10
[I] (17.83+^ 0.08)^ %
[I] (11.31+^ 0.15)^ %
[I] ( 7.^1 4 0.^5 ) x^10
[I] (25.24+^ 0.16)^ %
( 3.^0 +^ 3.^2 ) x^ 10—
[I] ( 5.^2 +^ 0.^5 ) x^10
( 9.50+^ 0.14)^ %
( 9.35+^ 0.14)
[I] { 927+^014
[I] { 8.^1 +^ 2.^7 ) x1O
( 146+^011
I] { 1 14+^0
[I] ( 5.^0 3'3 ) x^10
( 1.^8 +^ 0.^6 ) x 10
[i] ( 1.^2 4 0.^6 ) x^10
( 9.^4 +^ 1.^0 ) x^10
S=1. 3
S=1. 3
S=1. 2
S=1. 1
S=1. 1
S=1~ 1
S=1~ 1
S=1~ 1
S=1. 1
S=1, 1
S=1. 1
S=1. 1
S=1. 1
S=1. 1
885
888
883 820
878 878 814
862 796
836 766
Decay parameters
See the ~ Particle Listings for a note concerning ~-decay parameters.
p (e^ or^ p,^ ) =^ 0.^742 +^ 0.^027
p (e) =^ 0.?36^ +^ 0.^028
p~ (p, ) = 0. 74 + 0. 04
( (e or^ p, ) =^ 1.^03 +^ 0,^12
( (e) =^ 1.^03 +^ 0.^25
( (p) =^ 1.^23 +^ 0.^24
g (e^ or^ p) =^ —0.^01 6 0.^14
g~(p) =^ —0.^24 +^ 0.^29
(6() (e or^ p) =^ 0.^76 +^ 0.^11 (S^ =^ 1.3)
(S(} (e) =^ 1.11+0.^18
(b() (I ) =^ 0.^71 +^ O.^ i
g (rr) =^ 0.^99 +^ 0.^06
(~(p) =^ 1.^04 +^ 0.^07
(~(az) =^ 1.^01 +^ 0.^04
( (all^ hadronic^ modes)^ =^ 1.^011 +^ 0.^027
9-+ modes are charge conjugates of the modes below. "h+" stands for
7r+ or K+. '7"^ stands for e or p,. "Neutral" means neutral hadron whose
decay products include p's^ and/or 270's.
Mass m = 1777.00+027 MeV
Mean fife ~ =^ (291. 0 + 1.5) x^10 1 s
c~ =^ 87. 2 pm
Electric dipole moment d ( 5 x 10 ecm, CL =^ 95%
Weak dipole moment
Re(d~) ( 7. 8 x 10 ecm, CL =^ 95%
Im(d ) & 4. 5 x^10 17 ecm, CL =^ 95%
h K & 0 neutrals
OKL V~
h Kov~
Kov
Ko
(non- K'(892) ) v
K Kv~
h- Ko~ov
~- Ko~ov
K KQ^ pro^ v~
h (^) Ko( K(o v~
vr K Kv~
K K &^0 neutrals v
K &Ox &OK v~
K (particles) v~
Koh+h (^) h ) 0 neut. v
Modes with K 's
( 154'^010 S=1.^3
[I] ( 1.55+
( 5.^5 +
[] ( 41+
[i] ( 1.38+
( 2.^5
[I] ( 1.01+
( 2.^9 +
0.28) x 10
0. 5 ) xlo
0. 6 ) xlo
0.32) x 10
0. 6 )xlo 4
0.23) x 10
0. 4 )x
0.10) %
x 10
S=1. 2
CL=95%
( 9.^2 +^ 0.^8 ) x^10 S=1.^3
[i] ( 7.?^ +^ 0.^8 ) x^10 S=1.^3
1. 7 x 10 CL=95%
812 812
794 685
682
Lepton Summary Table
Modes with
h h h+^ & Oneut. v ("3-
prong" (^) )
h h h+^ & 0 neutrals v
(ex. Kos~ ~+n )
~+~ & 0 neutrals v
h h h+vT
h h h+vT(ex. K )
h h h+^ v (ex.Ko,cu)
h h h+^ & 1 neutrals v
h h h+^ & 1 neutrals v (ex.
s- +^ )
h h h+vrov
h
h
—h+xov
(ex. Ko)
h h h+vrov^ (ex. K, cu)
h (per)ov
(at(1260)h) v~
h (^) pal VT
h p+ h vT
h p h+^ vT
h h h+^ 2~0^ vT
h h h+2xov^ (ex.Ko)
h h h+2~ vT (ex.K,~,T/}
h h h+&3~ vT
K h+h^ & 0 neutrals v
K ~+~ & 0 neut. v
K ~+K^ & 0 neut. v
K K+~ & 0 neut. v
$ jl^ VT
K K+K^ &^0 neut.
three charged particles
(1409+ 031) ol
( 9.80+^ 0.10)%
( 948+^ 010)%
( 944+^ 010)%
( 5.08+^ 0.11)%
( 4.88+^ 0.11)%
[i] { 2.55+
- 0
( 4.^4
( 5.^2 +
( 5.^1
[i] (1o^ +
f] (11+ 6
( 3.^9 +
- 1
0.09) % 0 09) 0.09) % 0 34) 0/ 0.20) %
- (^2) ) x 10 0.23). %
0. 5 ) x
0. 5 ) x
0. 4 ) x
0. 6 ) x
x 10
1'6 ) x
x
0'3 ) x
1. 2 )x^
3
x 1O-
x
S=1. 3
S=1. 1
S=1. 1
S=1. 1
S=1. 2
S=1. 2
S=1. 1
S=1. 1
CL =95%
CL=9o%
S=l. 5
CL=95%
CL 90oj CL=95% VT
K++ & 0 neut. vT
e e e+vevT
p, e e vvT
- 5 x 10 CL=95%
2. 8 + 1.5)x
3. 6 x 10 5 CL=90%
CL=90%
Modes with five charged particles
3h 2h+ & 0 neutrals v ( 9. 7 + 0. 7 ) x 10
(ex. Kos~^ x^ ~+)
("5-prong")
3h 2h+ vT (ex.K )
3h 2h+~ vT(ex. K )
3h 2h+^ 2+0^ v„
888 885
e
/' 'Y
e- pro
P 7l
e- Ko
p Ko
e
/' '
e- po
p
e K*(892)o
y, K'(892)o
y
e e+e
e p, +p
p, e+e
p, +^ e-^ e-
P P P
e 71 7r
e+ 7r
p x+^ vr
P, 'Jl^ 7f
e- sr+ K-
e vr K+
e+ vr- K-
p ++K
p x^ K+
p+~- K-
O'Y P7l PQ
e K*(892)o
~- K*(892}'
e light boson
p light^ boson
LF LF LF LF LF LF LF LF LF LF LF LF L L LF LF LF LF L LF LF L LF L LF LF L LF LF L L, B L, B L, B LF LF LF LF
- 2
- 4
- 4 ( 13
6, 3
- 3
- 2
- 7
- 3
- 4
- 8 ( 3.^7
- 3
- 6
- 5
- 4
- 4
- 4
- 4
- 9
- 7
- 6
- 5
- 7
- 0
- 9
- 6
- 30
- 7
- 7 5
x 10
x10 6
xlo 4
x 10 x 10
x
x1O—^5
x1O—^5
x 10 6
x10 6
x 10 —^6
x10 6
x10 4
x1O—^4
x 10 —^6
xlo 6
x10—^6
x 10 —^6
x 10 6
x10 6
x 10 —^6
x10—^6
x 10 —^6
x 10 —^6
x10 6
xlo 6
x 10
x
x 1O-
x 10 x 10 4 x 10 4
x
x 10
x10 6
x
x
CL=90% CL=9O% CL=9O% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% CL=9O% CL=90% CL=90% CL=90% CL=90% CL=9O% CL=90% CL=90% CL=90% Cl =9O% CL=90% CL=90% CL=90% CL=90oj CL=90% CL=90% CL=90% CL=90% CL=90oy CL=90% CL=9o% CL=90% CL=90% CL=90% CL=95% CL=95%
Lepton Family number (LF}, Lepton number (L},
or Baryon number (8) violating modes
(in the^ modesbelaw,^ t^ means^ a^ sum^ over^ e^ and^ p modes)
L means lepton number violation (e.g. T ~^ e+2r yr ). Following
common usage, LF means lepton family violation and not lepton number
violation (e.g. T ~ e ~+~ ).
888 885 883 880 819 815 804 800 722 718 663 657 883 878 888 882 882 885 885 873 877 877 866 866 813 813 813 800 800 800 641 632 475 663 657
(5~} v
4h 3h+ & 0 neutrals
("7-prong" )
K'(892) &0(ho g Ks) v~
K*(892) & 0 neutrals v
K'(892) v
K*(892) K &^0 neutrals^ v
K*(892)o K v~
K'(892)on &Oneutrals v
K*(892)0z vT
K1 (1270) vT
K1(1400) vT
K2(1430)
''/7l (^) VT ~/7l X (^) VT 'g 7l 71 7l (^) VT 7/K (^) vT
g~+~ ~ & 0 neutrals v
g ger vT 'g'g (^) /l 7l VT
h cu &^0 neutrals v
h (d VT h &Pl VT
( 3.^2
(2O +
(3S +
( 2.^5
(s
( 3
[/] ( 1»+
- 3 ( 2.^6 ( 3 1, 1 ( 20
[] ( 1»+
[i] (^) ( 4. 1
O. (^) 13) % 0.08) %
1. 4 ) x
0, 6)xlo
- (^7) ) x lo
- (^1) ) x 10
4 )xlo
4 )xlo
x 10 x 1O- 0.28) x 10 x 1O-
0. 7 ) x
x
x 1O- x 1O-
O.O9) %
0. 6 ) x
Miscellaneous other all~ modes
( 3.^3 +^ 0.^7 ) x^10
v 1. 9 x 10 CL=9O%
CL=95% CL=95%
CL=95%
CL=90% CL 95oyo CL=95oyo
539
653
335 317
778
720
637
Heavy Charged Lepton Searches
L+ —charged lepton
Mass m & 42. 7 GeV, CL =^ 95%
L+ —stable charged heavy lepton
Mass m ) 42. 8 GeV, CL =^ 95%
mv —^0
Neutrinos
Mass m: Unexplained effects have resulted in significantly neg-
ative m in the new, precise tritium beta decay experiments.
It is felt that a real neutrino mass as large as 10 — 15 eV would
cause observable spectral distortions even in the presence of
the end-point count excesses.
Mean life/mass, r/m ) 300 s/eV, CL =^ 90% Magnetic moment (^) p ( 1. 8 x (^10) pB, CL = 90%
See the Particle Listings for a Note giving details of neutrinos, masses,
mixing, and the status of experimental searches.
Mass m (: 0. 17 MeV, CL =^ 90%
Mean life/mass, r/m ) 15. 4 s/eV, CL =^ 90% Magnetic rnornent (^) p, ( 7. 4 x (^10) pB, CL = 90%
Quark Summary Table
QUARKS
The u-, d-, and s-quark masses are estimates of so-called "current-
quark masses, "^ in a mass-independent subtraction scheme such as
MS at a scale p, = 1 GeV. The c- and b-quark masses are estimated
from charmonium, bottomonium, D, and B masses. They are the
"running" masses in the MS scheme. These can be different from
the heavy quark masses obtained in potential models.
l(~') =^ 0('+)
l(~') =^ o('+)
Charge =^ ~ e Top =^ +
Mass m =^ 4. 1 to 4. 5 GeV Charge = —& e Bottom = — 1
Massm=2to8MeV| j
m„/md =^ 0.^25 to^ 0.^70
Mass m =^5 to 15 MeV ~'j
ms/md ——^17 to^25
f(~ (^) ) =^ '('+)
Charge =^ & e lz =^ +&
f(~ (^) ) =^ '('+)
Charge = —&~ e I~ = —&~
l(~') =^ 0('+)
Mass m =^180 + 12 GeV (direct observation of top events)
Mass m =^ 179+ 8+at GeV {Standard Model electroweak fit)
b' {O'" Generation) Quark, Searches for
Mass m & 85 GeV, CL = 95% (pp, charged current decays)
Mass m & 46. 0 GeV, CL =^ 95% (e+ (^) e, all (^) decays}
Free Quark Searches
All searches since 1977 have had negative results.
Mass m =^100 to 300 MeV I^ I^ Charge =^ —&~ e Strangeness = — 1
(m, —(m„+^ md)/2)/(md —m, ) =^34 to^51
NOTES
Mass m =^ 1. 0 to 1. 6 GeV
f(")= o(l+)
Charge =^ &2 e Charm =+
[a) The^ ratios^ m„/md and^ m, /md are^ extracted^ from^ pion and kaon masses
using chiral symmetry. The estimates of u and d masses are not without
controversy and remain under (^) active investigation. Within the literature
there are even suggestions that the u quark could be essentially massless.
The s-quark mass is estimated from SU(3) splittings in hadron masses.
Meson Summary Table
LIGHT UNFLAVORED MESONS
(s= c=a=o)
For I =^1 (n, hp, , a): ud, (uu dd—)/v 2, du;
for I =^0 {rl, rI', h. h',^ cu, d, ff',^ ): ci(u u + d d) + c2(ss)
I (-I ) = 1 (0 )
lVlass m = 139. 56995 + 0. 00035 MeV
Mean life r =^ (2. 6033 + 0.0005) x 10 a^ s (5 =^ 1.2)
cr =^ 7. 8045 m
~+ (^) ~ Hey form f'actors [']
Fy ——0.^017 +^ 0.^008
Fp ——0.^0116 + 0.^0016 (S =^ 1.3}
R =^ 0.059+ —^ 0.' 008
modes are charge conjugates of the modes below.
charged modes
~+ ~-^ xo
7r+ r
e+e
p p 'y
e+e
P P
n-+m e+ e
sr+ vr 2y
~+n-~op
p p y
x+ vr
~o e+ e-
P j(J
(28.^6 +0.^6 )
( 4.^9 +1.^1 )
{ 3.^1 +0.^4 )
( 3
( 5.^8 +0.^8 )
+li
)
- 1 6 ( 3
S=1. 3
S=1. 3
S=1. 2
0/
x 10 x 10 x 10
x 1O—^6
x 10 x 10 x 10 4
x10 6
C L=90%
C L=90% CL=9O4/
Charge conjugation {C,Parity (P). or
Charge conjugation x Parity CP) violating modes
PCP ( 15 'x^10 C 5 x 10 4 CL=954/ c [h] ( x 10 CL=90% C [h] ( 5 x 10 CL=90%
175 236 274 253 274 253 236 236 175 211
236 274 258 211
~+ DECAY MODES
P
Fraction (I;/I ) Confidence level (MeV/c)
fo(400 1200)^
i'
IG(g&C) 0+(0++)
P+ V
P Vjtt y
e+ Ve
e+ Ve
e+ v, xO
e+Vee+e
e VeVV
Lepton Family number^ (LF)
p, +^ ve L
p+ LF
p, 8+8+v^ LF
[b] (99.^98770 +0.00004)^ %
[c] ( 1.^24 +0.^25 ) x 10
[b] ( 1.^230 +0.^004 ) x^10
[c] ( 1. 61 +0.^23 ) x 10
( 1 Q25^ +0^034 ) 10-
( 3.^2 +0.^5 ) x^10
x 10 90/o
or Lepton number {L)violating modes
[d] (^ 1.^5 x^ 1O-3^ 9O4/. [d] (^ s.o^ xlo^3 90% ( 1. 6 x 10 90%
30 30 70 70 4
70
30 30 30
f0(400-1200) DECAY MODES Fraction (I (^) t/I ) dominant seen
p (MeV/c)
P(770) (Ii^ ~'(~")^ =^ 1+(1--)
The interpretation of this entry as a particle is controversial. See the
"Note on scalar mesons" in the Particle l.istings under the fu(1370).
Mass m =^ (400-1200) MeV
Fuli width I =^ (600-1000) MeV
I'(i") = 1-(o-+)
Mass m =^ 134. 9764 + 0. 0006 MeV
m + —m 0 —4. 5936 + 0. 0005 MeV
Mean life r =^ (8. 4 6 0.6) x 10 ir^ s (S =^ 3.0)
cr =^ 25.1nm
p{??0)DECAY MODES Fraction {If/I )
100
Mass m =^ 768. 5 6 0. 6 MeV (S =^ 1.2}
Full width I =^ 150. 7 6 1. 2 MeV
l ee = 6. 77 + 0. 32 keV
Scale factor/ (^) p Confidence level (MeV/c) 358
0 DECAY MODES
e+e
p positronium
e+e+e e
e+e
4p
VV Ve Ve Vjs Vjs V7. (^) Vr
Charge conjugation (C}
p+ e + e p+
Scale factor/ (^) p
Fraction (I I/I ) Confidence level (MeV/c)
( 1.^82 +0.^29 )
( 3.^14 +0.^30 )
( 75 +20^ )
( 2 [e] ( 8.^3
- 1
/o S=l~ 1
x 1O—^9
x 1O—^5
x 1Q x 10 8 CL=904/o x 10 7 CL=904/ x 10 CL=90% x 10 CL=90% x 10 CL=90%
67 67
67 67 67 67 67 67
or Lepton Family number (LF) violating modes
C ( 3. 1 x 1Q CL=90'/o 67 LF (^) ( 172 x 10 CL=90% 26
m-+ (^) m
fj'y j +jM
e+e
7r+7r 7r+7r
~+ ~- no~
p(770}o decays
( 9.^9 +1.^6 )
( 7.^9 +2.^0 )
( 3.s^ +0.^7 )
[k] ( 4.60+ 0.28)
[k] ( 4.48+0.22)
( 2 4
x 10 x 10 4
x 1O —^4
x 1O-
x 1O-
x 10 4
x1O—^4
x 1O —^5
p{770}+decays
( 4.^5 +0.^5 ) x^ 1O^
6 x
- 0 x 10
S=2. 2
CL=S4% CL=S4%
CL=904/ CL=90% C L=90%
372 146 249
358 372 189 369 384
246 252
IGPPC) = 0+(0-+)
Mass m = 547. 45 + 0. 19 MeV (S = 1.6)
Full width I =^ 1. 18 + 0. 11 keV iri^ (S =^ 1.8)
ur(782) I^ (JPC)^ =0^ (1 )
Mass m =^ 781. 94 6 0. 12 MeV (S =^ 1.5)
Full width I = 8. 43 6 0. 10 MeV
I, =^ 0.^60 6 0.^02 keV
g DECAY^ MODES neutral modes
37 vr02p
other neutral modes
[f] (39.25+0.31) %
(32.^1 +0.^4 ) %
( 7.^1 +1.^4 ) x^10
- 8
S=1. 3
S=1. 3
S=1. 2
CL=90%
274 180 258
C-nonconserving decay parameters «]
n+s se Left-right asymmetry = (0. 09 + 0.17) x 10 2
++«e (^) Sextant asymmetry = (^) (0. 18 6 0.16) x 10 2
m+~ ~ Quadrant asymmetry = (—0. 17 + 0.1?) x 10
a+s p Left-right asymmetry = (0. 9 6 0.4) x 10
vr+~ p Iy {0-wave) = 0. 05 6 0. 06 (S = 1.5)
Scale factor/ (^) p Fraction (^) (l i/f ) Confidence level (^) (MeV/c)
uPI2) DECAY^ MODES
m+m-mo
7r+ (^) 7r
neutrals (excluding ~op)
rl (^) y
~o e+ e-
~ov+ v
Fraction (I f/f )
( 8.^5 +o.^5 )%
( 2.21+0^ 30) %
( 5.^3 +3'5^ ) x^10
( 8.^3 +2.^1 ) x^10
( 5.^9 +1.^9 ) x^10
( 9.^6 +2.^3 ) x^10
327 379 365
199 379 349
p Confidence level (MeV/c)
Meson Summary Table
fj(1285) IG(JPC)^ 0+(1++)^
seen seen
fj (1285) DECAY^ MODES
vrpvrpx+x-
27r+ 2'
ppx+ ~-
rl 7r 7r
ap(980) vr Lignoring ap(980) —+
KK]
tie x^ [excluding^ ap(980)x]
KKvr
K K*(892)
fp
Fraction (I;/I )
(29 y 6 ) 0/
(» +8^ )%
dOminateS 2'+ 22r
( 7 x
{54 y 15
S=l.l
CL=90%
S=1. 1
(10 +^ ) %
( 9.7+^ 1.6)^ %
not seen
( 6.6k^ 1.3) %
( 8,0+^ 3.1)^ x^10
4
S=1. 1
S=1. 2
S=1. 5
IVIass m =^ 1282. 2 + 0. 7 MeV I'~^ (S =^ 1.T)
Full width I =^ 24. 8 + 1. 3 MeV (ii^ (S =^ 1.3)
Scale factor/ Confidence level
P (MeV/c) 563 566 563 340 568 479 234
308
410 236
seen not seen
fj(1420) i"i^ I'(J")=^ o+(1++)
fj {1420)DECAY^ MODES
KK~
g7r7r
Fraction (I;/I )
dominant possibly seen
tu(1420) [o]^ IG(JPC}^ =^0 (1 }
Mass m =^1419 l 31 MeV
Full width I =^174 + 60 MeV
Mass m =^ 1426. 8 + 2. 3 MeV (S =^ 1.3)
Full width I = 53 + 5 MeV
p (MeV/c) 439 571
g(1295) I^ G(JPC)^ 0+(0^ +)
e(1420) DECAY^ MODES^ Fraction^ (I;/I )
dominant
p (MeV/c) 488
Mass m =^1295 + 4 MeV
Full width I = 53 6 6 MeV g(1440)^
(ni IG(JPC) 0+(0 —+)
g(1295) DECAY^ MODES
g~+ vr
ap(980) ~
Fraction (I;/f )
seen seen
sc(1300) (J )=1^ (o +)
Mass m =^1300 + 100 IVIeV ~^ j
Full width C =^200 to 600 MeV
p (MeV/c) 488 245 g(1440) DECAY MODES
K Kvr
g 7r^ Jr
ap(980) s
4x
Fraction (I;/I )
seen seen seen seen
Mass m =^1415 + 10 MeV ~'~
Full width I = 60+ 20 MeV ~~
p (MeV/c} 429 564 347 637
x(1300) DECAY^ MODES^ Fraction^ (I;/I } p (MeV/c) Ip(1450) iqi^ I (J ) =^1 (1 )
p7f
7r (fry)s' waye
seen seen.
406
612 Mass^ m^ =^1465 6 25 MeV^ ~'~
Full width I =^310 4 60 MeV I^ I
a2(1320) I G(JPC)^ =^1 (2++)^ p(1450) DECAY MODES Fraction (r;/I )
P Confidence level (^) (MeV/c)
Mass m =^131
Full width I
~(1320) DECAY^ MODES
p7l rl 7r
KK
q'(988) x
'y (^) y 7r+7r 7r
e+ e-
( 4.9+0.8)^ %
( 5.7+1.1)^ x^10
( 2.8+0.6)^ x^10
( 9.7+1.0) x^10
8
- 3 x 10
S=1. 2 419
535 362 437 287 652 659 621 659
S=1. 3
C L=90% CL=90%
8. 1 + 0. 7 MeV (S =^ 1.2)
107 6 5 MeV i'l^ (K+Ks and tIx modes)
Scale factor/ (^) p
Fraction (I;/I } Confidence level (MeV/c) gp
KK
seen seen seen
(1. 6 x 10
f,(15oo)^ i^ i
was fp(1525) and fp(1590)
I G(JPC)^ 0+(0+^ +)
Mass m =^1503 + 11 MeV
Full width I = 120+ 19 MeV
95%
95%
719 665 732 317 512 358 541
fp(1370) i'i
was fpt 1300)
IG(JPC) p+(0++)
IVlass m =^1200 to 1500 MeV
Full width I = 300 to 500 MeV
In two-particle decay modes^ the^ 2r2r decay is^ dominant.^ We^ include^ here
the resonance observed in 4' under the same entry as the one decaying
to 2 pseudoscalars. See also the minireview under non-qq candidates.
fp(1500) DECAY MODES
gg'(958)
gg
.per 0
2'+ 2r
fj(1510)
Fraction (I;/C)
seen seen seen seen seen
IG(JPC) 0+(1++)
p (MeV/c)
515 690 739 686
fp(1370) DECAY^ MODES
'ir (^) 7r
4x
27r+ (^) 27r
sr+sr-2zrp
Fraction (^) (I I/I ) seen seen seen seen
p (MeV/c)
fj {1510)DECAY^ MODES
K K*(892)+ c.c.
Fraction (^) (I I/f (^) ) seen
Mass m =^ 1512+ 4 MeV
Full width I =^35 6 15 MeV
p (MeV/c) 292
Meson Summary Table
f', (162s) I^ G(gPC)^ 0+(2^ +^ +)^ p(17OO) Iq)^ IG(JPC)^ =^ 1+(1^ )
Mass m =^ 1525+ 5 MeV ~~~
Full width l =^76 + 10 MeV ~'I
Mass m = 1700 6 20 MeV I'I^ (rl po and n+rr modes)
Full width I =^235 + 50 MeV I'I^ (ripe and rr+e.^ modes)
f2(1525) DECAY^ MODES
KK
rl 7l
'y 'y
Fraction (^) (I t/f )
(10. 3 y 3. 1
( 8.^2 +1.^5 ) x^10
( 1.32+0.21)^ x^10
Id(1600) I')^ (a^ ) =^ 0-(^
—-)
Mass m =^1649 + 24 MeV (S =^ 2.3)
Full width I =^220 + 35 MeV (S =^ 1.6)
p (MeV/c) 581 531 750 763
p(1700) DECAY MODES p7r 7r
p0~+ -
~p+ 7r+ 7r
2(7r+ 7r )
7r+7r
K K*(892)+ c.c.
'9p
KK
e+e
Fraction (^) (I I/I (^) ) dominant large large Ia I'ge seen seen seen seen seen
p (MeV/c) 640 640 642 792 838 479 533 692 850
au(1600) DECAY^ MODES p7r ld %7r
e+e
Fraction (^) (I (^) I /I (^) ) seen seen seen
p (MeV/c) 637 601
f&(1710) I'I^ I^
G
(JPC^ ) =^ 0+(even^ +^ +)
Mass m = 1697 6 4 MeV (S = 1.4)
Full width I = 175 + 9 MeV (S = 1.7)
ur3(1670) IG(JPC)^0
Mass m = 1667 6 4 MeV
Full width I =^168 + 10 MeV ~^ I
f~(1710) DECAY^ ~OD~S
KK
Fraction (I;jl )
seen seen seen
p (Mev/c) 690 648 837
au3(l. 670) DECAY^ MODES p7r
b1(1235)7r
Fraction (I;/I )
seen seen possibly seen
p (MeV/c) 647 614 359
$3(1850) IG(JPC)^0
Mass m =^1854 6 7 MeV
Full width I = 87+&a MeV (S = 1.2)
st2(1670) I'(~")^ =^ 1-(2-+)
Mass m =^1670 + 20 MeV I^ ~
Full width I = 258 + 18 MeV II^ (S = 1.7)
Cee =^ 1.^35 +^ 0.^26 keV
~(aaSO) DECAY^ MODES
KK
K K*(892)+ c.c.
f2(2010)
Fraction (I;/I )
seen seen
IG(gPC) 0+(2++)
p (MeV/c) 785 602
m2(1670) DECAY^ MODES 37r
r, (1270)~
per
fO(1370) 7r
K K*(892)+ c.c.
y y
Fraction (I;/I )
( 4.2+1.4)^ %
( 5.2+1.1)^ x^10
p (MeV/c) 806 325 649
453 835
f2(2010) DECAY MODES Fraction (C;/I (^) ) seen
Seen (^) by one (^) group only.
Mass m =^ 2011+80 MeV
Full width I = 202 + 60 MeV
p (MeV/c)
$(1680) I (~ ) =^ o (1 )
Mass m =^1680 + 20 IVleV ~'~
Full width I =^150 6 50 MeV ~^ ~
f4(2050) I G(gPC)^ Il+(4+^ +)
Mass m = 2044 + 11 MeV (S = 1.4)
Full width I =^208 + 13 MeV (S =^ 1.2)
$(1680) DECAY MODES
K K*(892)+ c.c.
KSK
KK
e+e
p3(1690)
Fraction (I;/I )
dominant seen seen seen not seen
I'(~") = 1+(3--)
p (MeV/c) 463 620
840 622
fg(2050) DECAY MODES
KK
rl fl
Fraction (I;/I )
( 6.8+34)—1. 8 x10-
( 2.1+0.8} x^10
p (MeV/c) 658 1012 895 863 977
J frOm the 27r and KK mOdeS.
Mass m =^1691 + 5 MeV ~'I
Full width f =^160 +^10 MeV ~'~^ (S =^ 1.5)
f2(2300) I^ (3 ) =^ 0+(2++)
Mass m =^2297 + 28 MeV
Full width I =^149 6 40 MeV
p3(1690) DECAY^ MODES
4m
~+~+~- n
(47 71
K K7r
KK
n~+ ~
Fraction (I;/I )
{67 +22^ ) %
(23.^6 +^ 1.^3 }%
38 y 12
( 1.58+^ 0.26)^ %
seen
656 628 686
p Scale factor (^) (MeV/c) 788 788
f2(2300) DECAY MODES Fraction (f;/I )
seen
p (MeV/c) 529
Meson Summary Table
CP-violation (^) parameters ["]
b = (0. 327 + 0.012)%
~goo~ =^ (2.^275 +^ 0.»9)^ x^ M^
'
(5 =^ 1.1)
i@i i^ =^ (2.^285 6 0.019)^ x^10
~aloof'9+ ~^ =^ 0.9956+^ 0.^0023
(rrl (5 = 1.8)
E /6. =^ (1. 5 + 0.8) x 10 [~]^ (S =^ 1.8)
d'oo —d+- =^ (—^02 6 08)
jfor^ KL vr+7r^ x^ =^ 0.^0011 +^ 0.^0008
~rl~ q~ =^ (2.^35 +^ 0.07)^ x^10
p+,
~i'. & 0.3, CL =90%
Ky(1270) DECAY^ MODES
Kp
Ko (^1 430)^ 7l
K*(892)a
K(u
K fp(1370)
Fraction (I;/l )
(42 y6 )
(28 y4 )
(16 ps )
11 0+2 0) 0/o
K1(1400) f(~^ ) =^ '(1+)
Mass m =^1402 + 7 MeV
Full width I = 174 + 13 MeV (S = 1.6)
K,(1270)
Mass m =^1273 + 7 MeV [']
Full width I =^90 + 2Q MeV [']
p (MeV/c) 76
301
h, S =^ —ZLq in K&~3 decay
Re x=^ 0.006+ 0. 018 (S =^ 1.3)
Im x = —0. 003 6 0. 026 (S = 1.2)
CPT-violation parameters
Re Z =^ 0. 018 + 0. 020
Im 6 =^ Q. 02 6 0. 04
K1(140O) DECAY^ MODES
K*(892)~
Kp
K fp(1370)
Ku)
Fraction (f;/f )
(94 +6^ ) %
( 2.0+2.0)^ %
p (MeV/c) 401 298
285
Ko~ DECAY MODES
~+ @+v
Called K„3.
e+ ve
Called Ke3.
Fraction (f (^) i/I )
(21 12 +0^27
gg] (27 17^ +0^25 ) 0
[gg] (38^78 +0^27
Scale factor/ (^) p Confidence level (MeV/c) 139
S=1. 7
S=1.l
133 216
S=1. 1 229
pro~+ e+ v
(rr @atom) v
vr e+ ve
vrovro,
( 5.^92
- 4
[hh] ( 1.7O
[gg] ( 5»
( 1.O
[y,gg, hh] ( 1.^3
[y, hh] (^) ( 4.^61
- 6
+0. 15 ) x 10
x 10
+0. 28 ) x 10 —^6
+0. 29 ) x 10
+0. 11 ) x 10
+0. 14 ) x 10
x 10
CL=90%
249 249 231 207
229 206 209
Charge conjugation x
violating modes,
.ovrO
P
P 'Y
e+e
e+e
e+e
x+x—e+^ e
p+p e+
e+e e+ e
P
vroe+ e
VV
e+ p+
Parity (Cia, CPlf) or Lepton Family number (LF)
or B,S =^1 weak neutral current (Sl) modes
CPV ( 2.067+0.035) x 10 S=1. 1
CPV ( 9. 36 +0. 20 ) x 10
S1 ( 7. 2 +0. 5 ) x 10 S=1. 4
S1 ( 3, 23 +0. 30 ) x 10
S1 4. 1 x 10 11CL=900/o
S1 ( 9. 1 +0. 5 ) x 10
S1 [hh] ( 6. 5 +1, 2 ) x 10
S1 2. 5 x 10 6 CL=90%
S1 4. 9 x 10 —^6 CL 900/
S1 [ii] ( 41 +0. 8 ) x 10 S=
Cp, S1 [ij] & 5. 1 x 10 9 Cl =900/
CP, S1 (^) Uj] & 4. 3 x 10 9 CL=90%
CP, S1 [kk] & 5. 8 x 10 5 CL=90%
i F [gg] & 3. 3 x 10 CL=90/o
206 209 225 225 249 249 249 206 225 249 177 231 231 238
K'{892) f(~ )=2(1 )
K*(892)+ mass m = 891. 59 + 0. 24 MeV (S = 1.1)
K*(892) mass m = 896. 10 + 0. 28 MeV (S = 1.4)
K*(892)+ full width I =^ 49. 8 + 0. 8 MeV
K*(892) full width^ I =^ 50. 5 6 0. 6 MeV (S =^ 1.1)
K'(1410) f(~ )=2(1 )
Mass m =^1412 + 12 MeV (S =^ 1.1)
Full width I =^227 + 22 MeV (S =^ 1.1)
K~(14M) DECAY^ MODES
K*(892)rr
K~
Kp
Fraction (^) (f i/I (^) ) ) 40
7
P Confidence level (^) (MeV/c) 95% 408 611 95% 309
Ko~(14g0) lr^ l^ ~(~')^ =^ &(0+)
Mass m =^1429 6 6 MeV
Full width I = 287 + 23 MeV
KO~(1430) DECAY MODES
K sr
Fraction (l;/f )
p (MeV/c) 621
K2(1430) f(~')^ = '(2+)
K*,(1430)+
K2 (1430)
K2(1430)+
K*,(1430)'
K2~(1430) DECAY MODES
K~
K*(892)vr
K*(892)7r vr
Kp
K(d
K+p
Kg
K~n.
Fraction (I;/I )
(2S.^2 +1.7)
(13.^0 k^ 2.3)
( 1 4+2^ 8)
9
0/
0/
x 10 x 10
x10 4
x 10 4
S=1. 2
S=1. 1
CL=9S% CL=9O%
P (MeV/c) 622 423 375 331 319 627 492
631
mass m = 1425. 4 6 1. 3 MeV (S = 1.1)
mass m =^ 1432. 4 + 1. 3 MeV
full width I =^ 98. 4 + 2. 3 MeV
full width I = 109 + 5 MeV (S = 1.9)
Scale factor/ Confidence level
K (892) DECAY MODES
Km
Kvr vr
Fraction (f i jf )
100
( 2.30+0.20)^ x^10
( 1.01+0.09)^ x^10
7 x 10 4 95%
p Confidence level (MeV/c) 291 310 309 224
Meson (^) Summary Table
K'(1680) [(i ) =^ '(1^ )
K~(1680) DECAY MODES
Kx
Kp
K*(892) 71
Fraction (I;/I )
(31.4+^ '^ ) o/
K (1y70) [mm[
Mass m =^1773 6 8 MeV
Full width I = 186 + 14 MeV
K2(1770) DECAY^ MODES
Kvr~
K'(1430) n.
K"(892)n
K f2 (1270)
KP
K(u
Fraction (^) (C;/I )
dominant seen seen seen seen
Mass m =^1714 + 20 MeV (S =^ 1.1)
Full width^ I^ =^323 + 110 MeV (S =^ 4.2}
p (MeV/c) 779 571
615
p (MeV/c)
287 653
441 608
CHARMED MESONS
(C=+1)
D+ = cd, D = cu, Do = cu, D = cd, similarly for D*'s
[(~ ) =^ Z(0 )
Mass m = 1869. 3 + 0. 5 MeV (S = 1.1)
Mean life r =^ (1. 057 + 0.015) x 10 ta^ s
cr =^317 pm
CP-violation decay-rate asymmetries
Acr (K+^ K^ ~+)^ =^ —^0 03 6 0
Acp(K+ K'^ ) =^ —0.^12 +^ 0.^13
AcI (4'7r+)^ =^ 0.^07 +^ 0.^09
0+ (^) ~ + (^) (892)of+ vs form factors
r2 ——0.^73 6 0.^15
r~ =^ 1.^90 +^ 0.^25
~I /~T ——1. 23 + o.^13
i-+/l =^ 0. 16 + 0. 04
0 modes are charge conjugates of the modes below.
Scale (^) factor/ (^) p
Fraction (I;/I ) Confidence level (MeV/c)
Ks(1780) 1(i')^ =^ &(3-)
Ks~(1780) DECAY MODES
Kp
K*(892)m
Kn.
Kg
K2 (1430)7r
Fraction (I;/I )
(4s +4^ ) %
( 21
Scale factor/ (^) p Confidence level (^) (MeV/c)
S=1. 4
S=1. 5
S=1. 4
CL 95o/
612 651 810 715 284
Ka(1820) [""[^ 1(i )=y(2 )
Mass m =^ 1816+ 13 MeV
Full width f = 276 + 35 MeV
K2(1820) DECAY MODES
KP
K2 (1430)vr
K'(892) ~
K f2(1270)
K~
Fraction (I;/r )
possibly seen seen seen seen seen
p {MeV/c) 481 325 680 186 638
Mass m =^1770 + 10 MeV (5 =^ 1.7)
Full width l =^164 6 17 MeV (S =^ 1.1)
e+ anything
K anything
Koanything + Koanything
K+ anything
g anything
InclUsive modes
{s9 +7 ) %
( 58 +14^ )%
[oo] ( 13
p+ v
Ko (^) E+ (^) vg
Koe+ v,
K p vp.
K sr+^ e+^ ve
K*(892)o e+^ v
x B(K*' K-~+)
K ~+^ e+^ ve nonresonant
K n-+^ p+ v„
K*(892) p+ v&
x B(K' K-~+)
K ~+^ p+^ v„nonresonant
( K'(892)^ n^ )a^ e+^ v,
(Ken )e
e+ v, non- K*(892)
K vr+xop+v„
7f' (^) E (^) vg
( 7 x 10
( 3.^2 +0.^4 ) %
( 3.^0 +0.^4 ) %
( 2.^7 +1.^1 ) x^10
9 x 10
1. 4 x 10
fqq] ( 5.^7 +2.^2 ) x^10
Leptonlc and semileptonic modes
( 7. 2 x1O —^4
[pp] ( 6.^7 +0.^8 ) %
( 66 +O9^ )%
(4. 2 +"—0, 7 )%
( 3.^2 +0.33)^ %
S=1. 4
C L=90%
C L=90%
C L=90%
S=1. 1
CL=90% CL=90% CL=90%
932 868 868 865
863 720
863 851 715
714 846 825 930
K4(2045) i(~')^ =^ &(4+}
K4(2045) ECAY^ MODES
K sr
K*(892)~ ~
K*(892}«~
pK~
(u Kvr
PK~
4 K*(892)
Fraction (I;/f )
(9.9+^ 1,2) %
(9 +5^ )%
(7 g5 )
(5 7+3 2) o/
Mass m = 2045 + 9 MeV (S = 1.1}
Full width I =^198 + 30 MeV
p (MeV/c) 958 800 764 742 736 591 363
Fractions of some appeared above as
K*(892}0Z+^ v&
K'(892) e+^ ve
K*(892)0p+ vp
p e^ ve
p p vp.
Pe+ ve
vp
g'(958}p, +^ v„
Hadronic modes with a K or KKK
( 2.74+0.29)^ %
frr] ( 9.^1 +0.^6 ) %
( 1 28+0^13
Ko„+
K- ~+~+
K*(892)n n +
x B(K*e ~ K rr+)
K'(1430)e n+
x B(K0(1430) K +)
K*(1680)'~+
x (^) B(K*(1680) ~ K n+)
K m+^ sr+ nonresonant
( 2 3 4 0 3 ) o/o
( 3.^7 +0.^8 ) x^10
( 8.^6 +0.^9 ) %
of the following modes with resonances have already submodes of particular charged-particle modes.
pp] ( 4.^8 +0.^4 ) '/o
48 +05 )o/
( 45 +06^ )%^ S=1~^1
3. 7 x 10 3 CL=90%
( 2O^
) x1O^
- 09 C L=90%
3. 72 CL=90%
9 x 10 3 CL=90%
720 720 715 776 772 657 651 684
862 845 712
368
65
845
Meson Summary Table
i(i') =^ &(0-)
Mass m =^ 1864.5+ 0. 5 MeV (S =^ 1.1)
~moo —moo~ (^21 x^10 h^ s^ CL^ =^ 90%^ l
mD+ —moo =^ 4.^78 +^ 0.^10 MeV
Mean life T =^ (0. 416 + 0.004) x 10 ta^ s
cr =^ 124. 4 pm
~l 0o 1 —I^ Oo~il 2 0o (^ 0.17,^ CL^ =^ 90%^ {
l (K+7r orK+2r 7r+7r (vi 0 ))
I (K- 2r+ or K 2r+ 2r+ 2r +^ Q^ QQ37^ CL^ 900/
) I (^) (p X (via Oo))/I (^) (p,+X) ( 0.0056, CL =^ 90%
CP-violation decay-rate asymmetries
Aci (K+^ K^ ) =^0 06 +^0
Ac (K P) =^ —0.^03 +^ 0.^09
Acp{K~s rro)^ =^ —0.^018 +^ 0.^030
D modes are^ charge conjugates of^ the^ modes^ below.
00 DECAY MODES
e+ anything
p+ anything
K anything
K anything+ K anything
K+ anything
g anything
Fraction (^) (C|/I (^) )
inclusive modes
[)fv] ( 6. 8 +1. 0 ) %
(s3 +4 ) %
42 +5 ) F
( +^ )%
[oo] (^13
Scale factor/ (^) p Confidence level (^) (MeV/c)
S=1, 1
CL=90%
K E+vp
K e+ve
K p v@
K-~0e+ v,
Ko~- e+ v,
K*(892) e+^ v
x B(K* ~^ Kos.^ )
K vr+7r p+ v
( K'(892)^ rr^ ) y+^ r^ „
'Jr e ve
Semileptonic modes
[pp] ( 3 48+^0 16)
+13 )oy
( 2 8
) 0'
( 1 34+0^22
x 10 x 10
+12 )x
S=1. 1
S=1. 1
CL=90% CL=9o%
867 867 863 861
860 719
821 693 927
719
A fraction of the following resonance mode has already (^) appeared above as a submode of a charged-particle mode.
K*(892) e+^ ve ( 2.01+0.33) %
K- ~+ ~+ ~- [rr]
K ~+^ po^ total
K ~+^ p03-body
K*(892}opo
x B(K*O^ ~ K sr+}
K at(1260)+
x (^) B(az(1260)+ ~ rr+ s.+^ rr (^) )
K*(892)orr+ rr total
x B(K*o^ ~^ K-n+)
K*(892}0~+^ ~ 3-body
x B(K 0 —+^ K
K1 (1270) x+^ [ss]
x B(K1(1270) +^ K^ w+^ +^ )
K ~+ ~+^ ~ nonresonant
K ~+~^ ~.^ [rr]
K q x B(g +^ )
Kldx 8( fr+a^ 7r)
K*(892)-p+
x B(K*^ ~^ Kovr^ )
K*(892) p
x B(K'^ -+^ Ks )
K1 (1270)^ m+^ [ss]
x (^) B(Kt(1270) ~^ Kerr^ rro)
K*(892)orr+ rr 3-body
x B(K' Ko~o)
Ko ~+ vr ~0 nOnreSOnant
K- ~+ ~0~
K- x+ ~+ ~- mo
K*(892) sr+^ m
x B(K*O^ ~^ K ++)
K*(892}o
x B(K*'^ K-~+)
x 8(g ~+~^ ~o)
K rr td x B(Ld ~^ rr rr s (^) )
K*(892)o^ ur
x B(K*o^ ~^ K rr+)
x 8 ((d x 'll^ 'ir^ )
Ko~+~+~-~-
Ken+ ~-
~one (~o)
KOK+ K
Kod x (^) B(4 ~^ K+K^ )
Ko K+ K non-P
Ks Kos^ Ks
K+ K K x+
K+ K Ko~o
( 7.S ( 6.^3 ( 4,^7
( 9.^8
+2. 1 ) x 10
+2. 2 ) x 10
( 15 g04^ )
( 9.S^ +2.^1 ) x^10
(10. 0 + 1.^2 )
( 1.^6 +0.^3 )
( 1.^9 +0.^4 )
( 4O^ +1.^6 )
x 10
0/
( 4.^9 +1.^1 ) x^10
( S.^1 +1.^4 ) x^10
( 4.^7 +1.^1 ) x^10
( 2.^1
( 4.o ( 1.^2
+2I. )
( 3.O^ +0.^8 ) x^10
( 2,^7
3 )x
( S.^8
(10.^6
( 9.^3
( 4.^2 ( 5.^0
( 9.^7
( 2.^1 ( 7.^2
1. 6 )x
+1. 0 ) x 10
+0. 5 ) x 10
+0. 8 ) x 10
k2. 3 ) x 10 4
+0. 5 ) x 10 4
—3. 5 ) x
( 3.^6 +1.^0 ) x^10
S=1. 1 812
612 612 418
327
683
683
812 812 772 670 422
418
483
683
812 815 771 641
580
605 406
768 771 544 520 544 538 434 435
K- ~+
Ko~+ ~—
Ko po
Ko f, (980)
x B(fo —+ m+~^ )
Ko fa (1270)
x (^) B(fa ~ rr+s (^) )
Ko fo (1370)
x B(fo s.+s^ )
K*(892)-~+
x B(K*^ —+^ Kerr^ )
Ko(1430) rr+
x B(KO(1430} K vr )
R x+^ ~ nonresonant
K- ~+M
K p+
K*(892)
x B(K*-^ K-~0)
K*(892}0~
x B(K*O K ~+}
K a+^ x nonresonant
K*(892)
x B(K*o ~ Korro)
K x vr nonresonant
( 2.^3 +0.^9 ) x^10
( 4.3^ +1.^3 ) x^10
( 6.^4 +1.^6 ) x^10
( 1.46+0.24)^ %
[rr] (13.^9 +0.^9 ) %
( 1.^7 +0.^2 ) %
( 6.^9 +2.^5 ) x^10
( 7.^8 +2.^0 ) x^10
Hadronic modes with a K or KKK
[rr] ( S4^ +04^ )%
( 1 20+0^17
( 3.^0 +0.^8 ) x^10
S=1. 1
S=1. 2
S=1. 3
861 860 842 676 549
263
711
364
842 844 678 711
709
844 843 709
843
Ko po
K p+
Ko~
Ko rl'(968)
Ko fo(980)
Koy
K at (1260)+
K at(1260)
Ko fa(1270)
K f{)(1370)
K a2(1320)+
K*(892)-~+
K*(892)'~'
K*(892}0sr+^ vr tota I
K*(892)0sr+^ ~ 3-body
K sr+^ po^ tota I
K ~+^ po^ 3-body
K*(892)0po
K*(892)opa transverse
K*(892)opo S-wave
K*(892)opo S-wave long.
K*(892) p P-wave
K*(892) p 0-wave
( 7.O^ +1.^0 ) x^10
( 2.^1 +0.^4 ) %
( 1.70+0.26)^ %
( 5.^7 +1.^6 ) x^10
( 8.^5 +1.^0 ) x^10
( 7.^3 +^ 1.^1 ) %
( 4.^1 +1.^5 ) x^10
( 6,^9 +2,^1 )x
x 10
( s.o^ +0.^4 )%
( 3.^1 +04^ )%
( 2.^3 +0.^5 ) %
( 1.42+0.32)^ %
( 4.^7 +2.^1 ) x^10
( 1.47+0.33)^ %
( 1.^5 +0.^5 ) %
( 2.^8 +0.^6 )%
3 x 10 ( 3 x 10
( 1.^9 +0.^6 ) %
S=1. 2
C L=90%
CL=9O%
S=1. 2
CL=90% C L=90%
Fractions of many of the following modes with resonances have already appeared above as submodes of particular charged-particle modes. (Modes for which there are (^) only upper limits and K~(892) (^) p submodes only appear below. (^) ) 772 676 678 670 565 549 520 327 322 263
197
709 683 683 612 612 418 418 418 418 418 418
Meson Summary Table
K*(892) p+
K*(892) p+ longitudinal
K*(892) p+ tra nsverse
K*(892) p+ P-wave
K- ~+ f, (980)
K*(892)0fo(980)
Kg (1270) sr+
Kg (1400) x+
Ky(1400)o xo
K*(1410) x+
Ko(1430) rr+
Ka(1430) x+
K2(1430)0 ~
K*(892) x+x n
K*(892) g
K- ~+a)
K*(892)
K- ~+ ~'(958)
K*(892) 71'(958)
n+ vr
~+ x-^ xo
vr+ 7r+ 7r 7r
~+ sr+ ~+ ~-^ vr-7r-
( 6.^0 k2.^4 ) /o
( 2.^9 +1.^2 ) %
( 3.^2 +1.^8 ) %
7 x
[ss] ( 1.06+0.29) %
( 1.04+0.26)^ 0/o
8 x 10 4 x 10
( 1.^8 +0.^9 ) %
( 1.^9 +0.^5 ) %
( 30 +06^ )%
( 1.^1 +0.^4 ) %
( 7,^0 +1.^8 )xlo
1, (^1) x 10
Plonic modes
( 1.52+0.11) x^10
( 8.^4 +2.^2 ) x^10
16 yll
( 7.^4 +0.^6 ) x^10
{ 1.^9 +04^ )%
( 4.^0 +3.^0 ) x^10
CL=90% CL=90/o CL=90%
CL=90% CL=90% CL=90/o
C L=90% CL=9O%
CL=9o%
S=2. 7
K+ K
KOKO
Ko K-~+
K*(892)o Ko
x B(K' K-~+)
K*(892)+K
x B(K*+^ Kow+)
K K sr+ nonresonant
Ko K+ vr
K*(892) K
x B(K* ~ K+7r (^) )
K"(892) K+
x B(K* ~ Ko~^ — }
K K+^ ~ nonresonant
K+ K-^ ~+~-
yn+x- x B(4 K+K-)
4po x^ B(oi~ K+K^ )
K+ K po 3-body
K*(892}0K sr+
x B(K'o^ ~^ K+n.^ )
K*(892}oK+^ vr
x B(K*O^ K-~+)
K(892}oK(892)o
x B(K* K+x^ )
K+ K ~++ non-$
K+ K sr+ ~ nonresonant
KOKO~+ ~-
K+ K-^ ~+~- ~
CL=90%
2. 3 +0. 5 ) x 10
2. 3 k2, 3 ) x 10
4. 9 +1. 0 ) x 10
5 x 10 4 CL=90o/o
1, 2 +0. 7 ) x 10
(38+— 1. 9 ) 1P
( 2.58+0.28)^ x^10
( 5.^3 +1.^4 ) x^ lO^
( 5.^3 ~1.^4 ) x1O-
( 9.^0 +^ 2.^3 ) x^10
( 2.^1 10.^9 ) x^10
[ww]
1. 1 +0. 8 ) x 10
6 k2 )xlo 4
(
( (
1. 7 +0. 5 ) x 10
8 x 10 CL=90%
6. 8 +2. 7 ) x 10
3. 1 +2. 0 ) x 10
Hadronic modes with a KK pair
( 4.33+0.27) x^10
( 1.^3 +0.^4 ) x^ 1O
( 6.^4 +1.^0 ) x^10
1. 1 x 10
422 422 422 422 459
483 386 387 378 364 367 363 641 580 605 406 479 99
922 922 907 879 844 795
791 788 739 605
61O
739 739 605
610
739 676 614 260 309 528
528
257
676 676 673 600
Doubly Cabibbo suppressed (DC) modes,
BC =^2 forbidden via mixing (C2M) modes,
LkC = 1 weak neutral current (Cl) modes, or
Lepton Family number (LF) violating modes
DC ( 2.9 +1. 4 ) xlo 4
C2M & 1. 9 x 10 4
DC & 14 x 10
C2M & 4 x 10 4
C2M & 4 x10 4
CI & 1. 3 x 10
C1 & 7. 6 x1O —^6
C1 & 4. 5 x 10
Cl 1. 8 x10 4
C1 1. 1 x10 4
C1 & 5. 3 x10 4
C1 1. 0 10 4
C1 2. 3 x 10
Cl 1. 8 x 10
Cl 8. 3 x 10 CI 5. 2 x 10
Cl 4. 1 x 1O —^4
[tt] & 1. 1 x 10
[tt] &^ 2.^6 x^10
[tt] &^ 1.^4 x^10
[tt] & 1.^18 x^10
C1 & 81 x10 4
LF [gg] & 1. 9 x 10
LF (^) [gg] & 8. 6 x 10
LF [gg] & 1. 0 x 10
LF (^) [gg] & 4.9 x 10
LF [gg] & 1. 2 x 10 4
LF [gg] & 3. 4 x 10
LF [gg] & 1. 0 x 10
LF [gg] & 1. 0 x 10
K+~
K+n (via Do}
K+~- ~+~-
K+rr rr+x (via Do)
p anything^ (via^ Oo)
e+e
P
~pe+ e-
~OP+1-
r1e+e
'OP P
poe+ e-
p p p
u)e+e
4P P )Lf
ye+ e
Koe+ e
K01+ P-
K'(892)o e+^ e
K*(892)op+ p
'Tr 7I 7r p p
p+
~pe~i +
r1e p+
we p+
Koe+ p+
K*(892) e+^ p+
CL=90% Cl =9p CL=9o% CL=9O% CL=9O% CL=9O%
CI =90%
CL=90% CL=9O% C L=90% CL=90%
CL =90%
Cl =9p CL=9O% CL=90% CL=90% CL=9O% CL=9O% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% CL=90% C L=90% CL=90% C L=90%
861 861 812 812
932 926 927 915 852 838 773 756 768 751 654 631 866 852 717 698 863 929 924 848 769 764 648 862 712
O~(2007)0 (^) DECAY MODES
Do~
Do+
Fraction (I;/i )
38 1 + 2 9) o/
p (MeV/c) 43 137
o'(20&o)+ i(~') =^ k(1-)
l, J, P need confirmation.
Mass m = 2010. 0 + 0. 5 MeV (S = 1.1)
mD*(2010)+ mD+.^ —140.^64 6 0.^09 MeV
mD, {2010)+ —mD,
—145. 42 6 0. 05 MeV
Full width l & 0. 131 MeV, CL = 90%
D'{2010) modes are charge conjugates of the modes below.
D'(2007)o
I, 3, P^ need^ confirmation.
Mass m =^ 2006. 7 + 0. 5 MeV (S =^ 1.1)
mD. o —mDO ——142.^12 +^ 0.^07 MeV
Full width l & 2. 1 MeV, CL =^ 90%
D'(2007) modes are charge conjugates of modes below.
K*(892)o Ko
K'(892)+ K
K*(892)o Ko
K'(892) K+
4n
ttr n.^ +^ n.
epo
Px+ vr 3-body
K*(892)^0 K^ x+
K*(892) K+^ +
K'(892) K*(892)o
( ( ( ( ( ( (
1. 6 x 10 3 CL=90%
3. 5 +0. 8 ) x 10
8 x10 4
1. 8 +1. 0 ) x 10
1. 4 x 10
- 8 x 10
- 1 x 10
1. 07 +0.29) x 10
1.07+0.29) x 10
5 x10 4
3. 2 +1. 3 ) x 10
1. 7 +1. 2 ) x 10
1. 4 +0. 5 ) x 10
CL=90%
CL=90% Cl =9O% CL=9O%
Fractions of most of the following modes with resonances have (^) already appeared above as submodes of particular charged-particle modes. 605 610 605 610 644 489 239 614 260 614 528 528 257
D~(2010)+ (^) DECAY MODES
Do~+
D+~
D+~
Fraction (I 1/I )
(30 6+2^5
( 1 1+2.1)^ i/
~(2420)o
D1(2420) modes^ are^ charge^ conjugates^ of^ modes^ below,
O, (2420)0^ DECAY^ MODES
D*(2010)+~-
D+vr-
Fraction (I;/I )
seen not seen
f(~ ) =^ 2(1+)
l, J, P need confirmation.
Mass m =^ 2422. 2 + 1. 8 MeV (S =^ 1.2)
Full width I =^ 18.9+3'5 MeV
p (MeV/c) 39 38 136
p (MeV/c) 355 474
