Title

Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements

Author(s)/Creator(s)

Raymond Mountain, Syracuse UniversityFollow
Marina Artuso, Department of Physics, Syracuse University, Syracuse, NYFollow
S. Blusk, Department of Physics, Syracuse University, Syracuse, NYFollow
T. Skwarnicki, Department of Physics, Syracuse University, Syracuse, NY

Document Type

Article

Date

10-12-2010

Language

English

Disciplines

Physics

Description/Abstract

The decays of psi(2S) into gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been studied with the CLEO-c detector using a sample of 24.5 million psi(2S) events obtained from e^+e^- annihilations at sqrt{s} = 3686 MeV. The data show evidence for the excitation of several N^* resonances in p pi^0 and p eta channels in pi^0 p bar{p} and eta p bar{p} decays, and f_2 states in gamma p bar{p} decay. Branching fractions for decays of psi(2S) to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been determined. No evidence for p bar{p} threshold enhancements was found in the reactions psi(2S)-> X p bar{p}, where X = gamma, pi^0, eta. We do, however, find confirming evidence for a p bar{p} threshold enhancement in J/psi-> gamma p bar{p} as previously reported by BES.

Additional Information

25 pages, 21 figures, accepted by PRD More information at http://arxiv.org/abs/1007.2886

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Recommended Citation

Mountain, Raymond; Artuso, Marina; Blusk, S.; and Skwarnicki, T., "Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements" (2010). Physics - All Scholarship. 389.
https://surface.syr.edu/phy/389

Source

Harvested from Arxiv.org

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.