1Department of Physics, Southeast University, Nanjing 210094 2Department of Physics, Nanjing Normal University, Nanjing 210097 3Joint Center of Particle, Nuclear Physics and Cosmology, and Department of Physics, Nanjing University, Nanjing 210093
In the framework of a chiral constituent quark model, considering the contributions of π annihilation and one-gluon annihilation, the proton--antiproton s-wave elastic scattering cross section experimental data can be reproduced by adjusting properly one-gluon annihilation coupling constant. After fixing the model parameters, we perform a dynamical calculation for all possible s-wave nucleon--antinucleon states. The results show that there is no s-wave bound state as indicated by a strong enhancement at threshold of p¯p in J/Ψ and B decay.
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PANG Hou-Rong, PING Jia-Lun, WANG Fan. N ¯NS-Wave Elastic Cross Section and Possible Bound States in a Constituent Quark Model[J]. Chin. Phys. Lett., 2008, 25(9): 3192-3195.
PANG Hou-Rong, PING Jia-Lun, WANG Fan. N ¯NS-Wave Elastic Cross Section and Possible Bound States in a Constituent Quark Model[J]. Chin. Phys. Lett., 2008, 25(9): 3192-3195.
PANG Hou-Rong, PING Jia-Lun, WANG Fan. N ¯NS-Wave Elastic Cross Section and Possible Bound States in a Constituent Quark Model[J]. Chin. Phys. Lett., 2008, 25(9): 3192-3195.
PANG Hou-Rong, PING Jia-Lun, WANG Fan. N ¯NS-Wave Elastic Cross Section and Possible Bound States in a Constituent Quark Model[J]. Chin. Phys. Lett., 2008, 25(9): 3192-3195.
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