Measurement of the Decays B⁰_sto J/psi\,φ(1020), B⁰_{s}to J/psi\,f'₂(1525) and B⁰_sto J/psi\,K^+K^- at Belle

Belle Collaboration: F. Thorne , C. Schwanda , I. Adachi , H. Aihara , D. M. Asner , V. Aulchenko , T. Aushev , A. M. Bakich

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A. Bala B. Bhuyan G. Bonvicini M. Bra\v{c}ko M.-C. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova S.-K. Choi Y. Choi D. Cinabro J. Dalseno Z. Dole\v{z}al Z. Dr\'asal D. Dutta S. Eidelman S. Esen H. Farhat J. E. Fast M. Feindt T. Ferber V. Gaur N. Gabyshev R. Gillard 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. Kody\v{s} P. Kri\v{z}an 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. Petri\v{c} 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. Stani\v{c} M. Stari\v{c} U. Tamponi K. Tanida G. Tatishvili Y. Teramoto M. Uchida Y. Unno S. Uno P. Urquijo 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

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classification ✦ hep-ex

keywords leftrightmathrmbranchingfractionmathcalstatsyst

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We report a measurement of the branching fraction of the decay $B^0_s\to J/\psi\,\phi(1020)$, evidence and a branching fraction measurement for $B^0_s\to J/\psi\,f'_2(1525)$, and the determination of the total $B^0_s\to J/\psi\,K^+K^-$ branching fraction, including the resonant and non-resonant contributions to the $K^+K^-$ channel. We also determine the $S$-wave contribution within the $\phi(1020)$ mass region. The absolute branching fractions are $\mathcal{B}[B^0_s\to J/\psi\,\phi(1020)]=(1.25 \pm 0.07\left(\mathrm{stat}\right)\pm 0.08\left(\mathrm{syst}\right)\pm 0.22\left(f_s\right))\times 10^{-3}$, $\mathcal{B}[B^0_s\to J/\psi\,f'_2(1525)]=(0.26\pm 0.06\left(\mathrm{stat}\right)\pm 0.02\left(\mathrm{syst}\right) \pm 0.05\left(f_s\right))\times 10^{-3}$ and $\mathcal{B}[B^0_s\to J/\psi\,K^+K^-] = (1.01\pm 0.09\left(\mathrm{stat}\right) \pm 0.10\left(\mathrm{syst}\right)\pm 0.18\left(f_s\right))\times 10^{-3}$, where the last systematic error is due to the branching fraction of $b\bar{b}\to B^{(*)}_s B^{(*)}_s$. The branching fraction ratio is found to be $\mathcal{B}[B^0_s\to J/\psi\,f'_2(1525)]/\mathcal{B}[B^0_s\to J/\psi\,\phi(1020)]=(21.5\pm 4.9\left(\mathrm{stat}\right) \pm2.6\left(\mathrm{syst}\right))%$. All results are based on a 121.4 fb$^{-1}$ data sample collected at the $\Upsilon(5S)$ resonance by the Belle experiment at the KEKB asymmetric-energy $e^+e^-$ collider.

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Measurement of the Decays B⁰_sto J/psi\,φ(1020), B⁰_{s}to J/psi\,f'₂(1525) and B⁰_sto J/psi\,K^+K^- at Belle

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