Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-12-09
Mod.Phys.Lett. A21 (2006) 1757-1760
Physics
High Energy Physics
High Energy Physics - Experiment
Accepted by Mod. Phys. Lett. A
Scientific paper
10.1142/S0217732306020093
In this letter, we discuss the possibility to look for the direct evidence of the existence of the ppbar and npbar bound states. Measurement of the single \gamma ray from the ppbar and npbar systems at rest can directly confirm whether the X(1860) and X(1835) are the resonances which are strongly coupled to ppbar. In addition to the neutral candidate, a charged resonance $X^-$ is also proposed to be searched for in npbar channel. We find that the data from the Crystal Barrel experiment at LEAR/CERN can be used to confirm the X(1835) observed by BES Collaboration. The possibility of measuring the $\gamma$ spectrum below 100 MeV at the new experiment with cold high intensity $\pbar$ beam at GSI is discussed. These new techniques can be used to probe the structure of the X(1860) and X(1835) in the future.
Li Haibo
Yang Maozhi
Yuan Changzheng
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