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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, vol. 90, p. -

Search for C -parity violation in J /ψ →γγ and γφ

Ablikim M., Achasov M. N., Ai X. C., Albayrak O., Albrecht M., Ambrose D. J., Amoroso A., An F. F., An Q., Bai J. Z., Ferroli R. Baldini, Ban Y., Bennett D. W., Bennett J. V., Bertani M., Bettoni D., Bian J. M., Bianchi F., Boger E., Bondarenko O., Boyko I., Braun S., Briere R. A., Cai H., Cai X., Cakir O., Calcaterra A., Cao G. F., Cetin S. A., Chang J. F., Chelkov G., Chen G., Chen H. S., Chen J. C., Chen M. L., Chen S. J., Chen X., Chen X. R., Chen Y. B., Cheng H. P., Chu X. K., Chu Y. P., Cibinetto G., Cronin-Hennessy D., Dai H. L., Dai J. P., Dedovich D., Deng Z. Y., Denig A., Denysenko I., Destefanis M., De Mori F., Ding Y., Dong C., Dong J., Dong L. Y., Dong M. Y., Du S. X., Fan J. Z., Fang J., Fang S. S., Fang Y., Fava L., Feldbauer F., Felici G., Feng C. Q., Fioravanti E., Fu C. D., Gao Q., Gao Y., Garzia I., Geng C., Goetzen K., Gong W. X., Gradl W., Greco M., Gu M. H., Gu Y. T., Guan Y. H., Guo A. Q., Guo L. B., Guo T., Guo Y. P., Haddadi Z., Han S., Han Y. L., Harris F. A., He K. L., He Z. Y., Held T., Heng Y. K., Hou Z. L., Hu C., Hu H. M.

© 2014 American Physical Society. Using 1.06×108 ψ(3686) events recorded in e+e- collisions at s=3.686GeV with the BESIII at the BEPCII collider, we present searches for C-parity violation in J/ψ→γγ and γφ decays via ψ(3686)→J/ψπ+π-. No significant signals are observed in either channel. Upper limits on the branching fractions are set to be B(J/ψ→γγ)<2.7×10-7 and B(J/ψ→γφ)<1.4×10-6 at the 90% confidence level. The former is one order of magnitude more stringent than the previous upper limit, and the latter represents the first limit on this decay channel.