On the structure of the X(1835) baryonium.

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.80.045207· OSTI ID:985632

Dedonder, J -P; Loiseau, B; El-Bennich, B; Wycech, S

The measurement by the BES Collaboration of J/{psi} {yields} {gamma}p{bar p} decays indicates an enhancement at the p{bar p} threshold. In another experiment, BES finds a peak in the invariant mass of {pi} mesons produced in the possibly related decay J/{psi} {yields} {gamma}{pi}{sup +}{pi}{sup -}{eta}{prime}. Using a semiphenomenological potential model that describes all the N{bar N} scattering data, we show that the explanation of both effects may be given by a broad quasibound state in the spin and isospin singlet S wave. The structure of the observed peak is due to an interference of this quasibound state with a background amplitude and depends on the annihilation mechanism.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; EC6-Th Program
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 985632
• Report Number(s): ANL/PHY/JA-64086
• Journal Information: Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: Oct. 2009 Vol. 80; ISSN 0556-2813
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANNIHILATION
BARYONIUM
DECAY
ISOSPIN
MESONS
QUASIBOUND STATE
S WAVES
SCATTERING
SPIN