TY - JOUR
T1 - In search of the ηc
AU - Eilam, G.
AU - Margolis, B.
AU - Rudaz, S.
PY - 1979/1/1
Y1 - 1979/1/1
N2 - We argue that the X(2.88) detected in π-p → γγ + n at 40 GeV/c cannot be the ηc. We discuss the possibility that a qq̄cc̄ state is produced there, probably the same state discovered in radiative decay of the J/ψ. Only at much higher energies is the ηc expected to dominate over qq̄cc̄ in the π-p interaction. We also discuss coherent photoproduction and find that four quark state production would dominate over ηc.
AB - We argue that the X(2.88) detected in π-p → γγ + n at 40 GeV/c cannot be the ηc. We discuss the possibility that a qq̄cc̄ state is produced there, probably the same state discovered in radiative decay of the J/ψ. Only at much higher energies is the ηc expected to dominate over qq̄cc̄ in the π-p interaction. We also discuss coherent photoproduction and find that four quark state production would dominate over ηc.
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U2 - 10.1016/0370-2693(79)90223-5
DO - 10.1016/0370-2693(79)90223-5
M3 - Article
AN - SCOPUS:49249145541
VL - 80
SP - 306
EP - 308
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3
ER -