Proton-antiproton annihilation into ηηπ-observation of a scalar resonance decaying into ηη

Authors :: Herbert Koch
C. Felix
U. Meyer-Berkhout
Z. Jávorfi
G. Pinter
C. A. Meyer
A. Noble
R. Hackmann
T. Kiel
S. Spanier
L. Montanet
B. Kämmle
C.A. Baker
S. von Dombrowski
B. M. Barnett
R. P. Haddock
Č. Zupančič
U. Wiedner
Kenneth M. Crowe
K. Beuchert
R. Landua
Michael Doser
H. Matthaey
N. Winter
F. H. Heinsius
P. Schmidt
C. Völcker
C. Kolo
D. Jamnik
D. Engelhardt
H. Bossy
C. J. Batty
Marcel Kunze
W. Dünnweber
A. H. Sanjari
S. Ravndal
M. Englert
Eberhard Klempt
H. P. Dietz
J. P. Merlo
I. Augustin
K. Königsmann
R. Bossingham
P. Blüm
D. Walther
B. Schmid
U. Strohbusch
D.V. Bugg
A. Cooper
P. Illinger
J. Lüdemann
D. Urner
T. Case
C. Straβburger
James A. Bistirlich
K. Braune
J. Zoll
M. Merkel
Nigel Hessey
Mark J. Burchell
Pàl Hidas
C. Amsler
P. Birien
M. A. Faessler
M. Suffert
K. Peters
G. Folger
H. Kalinowsky
R. Beckmann
E. Schäfer
Source :: Physics Letters B. 291:347-354
Publication Year :: 1992
Publisher :: Elsevier BV, 1992.
Abstract: The results of a measurement of pp annihilation at rest into ηηπ 0 are presented. Assuming a resonance dominated model for the annihilation process an isoscalar J PC =0 ++ resonance decaying into ηη is observed with a mass of 1560±25 MeV/ c 2 and a width of 245±50 MeV/ c 2 .

Subjects :: Physics
Nuclear and High Energy Physics
Particle physics
Annihilation
Proton
010308 nuclear & particles physics
Isoscalar
Nuclear Theory
Scalar (mathematics)
Dalitz plot
01 natural sciences
Resonance (particle physics)
Nuclear physics
Antiproton
0103 physical sciences
Mass spectrum
010306 general physics

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