Near-threshold η meson production in proton–proton collisions

Authors :: M. Jochmann
R. Santo
J. T. Balewski
M. Köhler
A. Strzałkowski
T. Sefzick
Paweł Moskal
T. Lister
P. Kowina
A. Budzanowski
G. Schepers
U. Seddik
W. Oelert
K. Kilian
M. Wolke
S. Sewerin
H. Dombrowski
D. Grzonka
C. Quentmeier
L. Jarczyk
A. Khoukaz
P. Wüstner
Jerzy Smyrski
Source :: Physics Letters B. 474:182-187
Publication Year :: 2000
Publisher :: Elsevier BV, 2000.
Abstract: The production of eta mesons has been measured in the proton-proton interaction close to the reaction threshold using the COSY-11 internal facility at the cooler synchrotron COSY. Total cross sections were determined for eight different excess energies in the range from 0.5 MeV to 5.4 MeV. The energy dependence of the total cross section is well described by the available phase-space volume weighted by FSI factors for the proton-proton and proton-eta pairs.<br />Comment: 9 pages, 1 table, 5 figures