Baryonium with a phenomenological Skyrmion-type potential

Journal Article · Mon Aug 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.034027· OSTI ID:20711235

Mulin, Yan; Si, Li; Bin, Wu; Boqiang, Ma ^[1]

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1. Interdisciplinary Center for Theoretical Study, University of Science and Technology of China, Hefei, Anhui 230026 (China)

In this paper, we investigate the nucleon-antinucleon static energies in the Skyrme model with the product Anzatz. The calculation shows that, in the ungroomed SS (Skyrmion and anti-Skyrmion) channel which leads to rapid annihilation, there exists a quasistable bound state which may give a natural explanation for the near-threshold enhancement in the proton-antiproton (pp) mass spectrum reported by the BES Collaboration and the Belle Collaboration. Similar to the phenomenological well potential of the deuteron, we construct a phenomenological Skyrmion-type potential to study this narrow pp-resonance in J/{psi}{yields}{gamma}pp. By this potential model, a pp baryonium with small binding energies is suggested and the decay width of this state is calculated by WKB approximation. In this picture the decay is attributed to quantum tunneling and pp annihilation. Prediction on the decay mode from the baryonium annihilation at rest is also pointed out.

• OSTI ID: 20711235
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYONIUM
BINDING ENERGY
BOUND STATE
DEUTERONS
HADRONIC PARTICLE DECAY
J PSI-3097 MESONS
MASS FORMULAE
MASS SPECTRA
PARTICLE WIDTHS
PHOTONS
PROTON-ANTIPROTON INTERACTIONS
PROTON-PROTON INTERACTIONS
RESONANCE PARTICLES
REST MASS
SKYRME POTENTIAL
SOLITONS
TUNNEL EFFECT
WKB APPROXIMATION