Search for the weak decay η′ →k±π and precise measurement of the branching fraction B (J /ψ →φη′) SEARCH for the WEAK DECAY ⋯ M. ABLIKIM et al.

M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, M. Bertani, D. Bettoni, J. M. Bian, F. Bianchi, E. Boger, I. BoykoR. A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, H. Y. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, X. R. Chen, Y. B. Chen, H. P. Cheng, X. K. Chu, G. Cibinetto, H. L. Dai, J. P. Dai, A. Dbeyssi, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, H. Muramatsu, R. Poling, (BESIII Collaboration)

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Abstract

We present the first search for the rare decay of η′ into K±π in J/ψ→φη′, using a sample of 1.3×109 J/ψ events collected with the BESIII detector. No significant signal is observed, and the upper limit at the 90% confidence level for the ratio B(η′→K±π)B(η′→γπ+π-) is determined to be 1.3×10-4. In addition, we report the measurement of the branching fraction of J/ψ→φη′ to be [5.10±0.03(stat)±0.32(syst)]×10-4, which agrees with previous results from BESII.

Original languageEnglish (US)
Article number072008
JournalPhysical Review D
Volume93
Issue number7
DOIs
StatePublished - Apr 20 2016

Bibliographical note

Funding Information:
This work is supported in part by the National Key Basic Research Program of China under Contract No.2015CB856700; the National Natural Science Foundation of China (NSFC) under Contracts No.11125525, No.11235011, No.11322544, No.11335008, No.11425524, No.11105101, No.11205117, No.11575133, and No.11175189; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); the Collaborative Innovation Center for Particles and Interactions (CICPI); the Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No.11179007, No.U1232201, No.U1332201, and No.U1232109; CAS under Contracts No.KJCX2-YW-N29 and No.KJCX2-YW-N45; the 100 Talents Program of CAS; the National 1000 Talents Program of China; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; the German Research Foundation DFG under Contract No.Collaborative Research Center CRC-1044; the Istituto Nazionale di Fisica Nucleare, Italy; the Ministry of Development of Turkey under Contract No.DPT2006K-120470; the Russian Foundation for Basic Research under Contract No.14-07-91152; the Swedish Research Council; the U.S. Department of Energy under Contracts No.DE-FG02-04ER41291, No.DE-FG02-05ER41374, No.DE-FG02-94ER40823, and No.DESC0010118; the U.S. National Science Foundation; the University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; and the WCU Program of the National Research Foundation of Korea under Contract No.R32-2008-000-10155-0.

Publisher Copyright:
© 2016 American Physical Society.

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