Can the observed enhancement in the mass spectrum of p \bar p in J/ψ\to γp \bar p be interpreted by a possible p \bar p bound state
Xiang Liu, Xiao-Qiang Zeng, Yi-Bing Ding, Xue-Qian Li, Hong Shen, Peng-Nian Shen
Abstract
Provided the enhancement in the
p
p
¯
spectrum in radiative decay
J/ψ→γp
p
¯
observed by the BES collaboration is due to an existence of a
p
p
¯
molecular state, we calculate its binding energy and lifetime in the linear
σ
model. We consider a possibility that the enhancement is due to a
p
p
¯
resonance which is in either S-wave or P-wave structure and compare our results with the data.