Measurement of the decays Bs0→J/ψφ(1020), Bs0→J/ ψf2′(1525) and Bs0→J/ψK+K- at Belle

F. Thorne*, C. Schwanda, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, B. Bhuyan, G. Bonvicini, M. Bračko, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. ChobanovaS. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, V. Gaur, N. Gabyshev, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodyš, P. Križan, P. Krokovny, T. Kuhr, J. S. Lange, S. H. Lee, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, C. Ng, S. Nishida, O. Nitoh, S. Okuno, C. Oswald, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Prim, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, G. Varner, K. E. Varvell, V. Vorobyev, M. N. Wagner, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report a measurement of the branching fraction of the decay Bs0→J/ψφ(1020), evidence and a branching fraction measurement for Bs0→J/ψf2′(1525), and the determination of the total Bs0→J/ψK+K- branching fraction, including the resonant and nonresonant contributions to the K+K- channel. We also determine the S-wave contribution within the φ(1020) mass region. The absolute branching fractions are B[Bs0→J/ψφ(1020)]=(1. 25±0.07(stat)±0.08(syst)±0.22(fs))×10 -3, B[Bs0→J/ψf2′(1525)]=(0.26±0.06(stat) ±0.02(syst)±0.05(fs))×10-3, and B[Bs0→J/ψK+K-]=(1.01±0.09(stat)±0. 10(syst)±0.18(fs))×10-3, where the last systematic error is due to the branching fraction of bb̄→Bs(*) Bs(*). The branching fraction ratio is found to be B[Bs0→J/ ψf2′(1525)]/B[Bs0→J/ψφ(1020)]=(21.5±4.9(stat) ±2.6(syst))%. All results are based on a 121.4 fb-1 data sample collected at the Υ(5S) resonance by the Belle experiment at the KEKB asymmetric-energy e+e- collider.

Original languageEnglish
Article number114006
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume88
Issue number11
DOIs
StatePublished - 2 Dec 2013
Externally publishedYes

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