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arXiv · 1309.0704

Measurement of the Decays $B^0_s\to J/ψ\,ϕ(1020)$, $B^0_{s}\to J/ψ\,f'_2(1525)$ and $B^0_s\to J/ψ\,K^+K^-$ at Belle

Belle Collaboration·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. Chobanova·S. -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·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
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Abstract

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

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Belle Collaboration, 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. Chobanova, S. -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, 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. 2013-11-07. Measurement of the Decays $B^0_s\to J/ψ\,ϕ(1020)$, $B^0_{s}\to J/ψ\,f'_2(1525)$ and $B^0_s\to J/ψ\,K^+K^-$ at Belle. https://arxiv.org/abs/1309.0704

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