Two-photon widths of the states and helicity analysis for
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American Physical Society
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Abstract
Based on a data sample of events collected with the BESIII detector, the decays are studied to determine the two-photon widths of the states. The two-photon decay branching fractions are determined to be and . From these, the two-photon widths are determined to be , , and , where the uncertainties are statistical, systematic, and those from the PDG and errors, respectively. The ratio of the two-photon widths for helicity and helicity components in the decay is measured for the first time to be .
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Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., . . . Zuo, J. X. (2012). Two-photon widths of the states and helicity analysis for . Physical Review D - Particles, Fields, Gravitation and Cosmology, 85(11), 112008. http://dx.doi.org/10.1103/PhysRevD.85.112008
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© 2012 American Physical Society.
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