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N ¯N S-Wave Elastic Cross Section and Possible Bound States in a Constituent Quark Model |
| PANG Hou-Rong1, PING Jia-Lun2 WANG Fan3 |
| 1Department of Physics, Southeast University, Nanjing 2100942Department of Physics, Nanjing Normal University, Nanjing 2100973Joint Center of Particle, Nuclear Physics and Cosmology, and Department of Physics, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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PANG Hou-Rong, PING Jia-Lun WANG Fan 2008 Chin. Phys. Lett. 25 3192-3195 |
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Abstract 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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| Keywords:
12.39.Jh
14.20.Pt
13.75.Cs
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Received: 08 March 2008
Published: 29 August 2008
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