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arXiv · 2101.07753

Measurement of Branching Fraction and Search for $CP$ Violation in $B\to \phi \phi K$

S. Mohanty·A. B. Kaliyar·V. Gaur·G. B. Mohanty·I. Adachi·K. Adamczyk·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·T. Aziz·V. Babu·S. Bahinipati·P. Behera·M. Bessner·V. Bhardwaj·T. Bilka·J. Biswal·A. Bobrov·A. Bozek·M. Bračko·T. E. Browder·M. Campajola·D. Červenkov·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·K. Cho·S. -J. Cho·S. -K. Choi·Y. Choi·S. Choudhury·D. Cinabro·S. Cunliffe·S. Das·N. Dash·G. De Nardo·R. Dhamija·F. Di Capua·Z. Doležal·T. V. Dong·S. Eidelman·T. Ferber·B. G. Fulsom·N. Gabyshev·A. Garmash·A. Giri·P. Goldenzweig·B. Golob·O. Grzymkowska·Y. Guan·K. Gudkova·C. Hadjivasiliou·S. Halder·K. Hayasaka·H. Hayashii·W. -S. Hou·C. -L. Hsu·K. Inami·A. Ishikawa·R. Itoh·M. Iwasaki·W. W. Jacobs·H. B. Jeon·S. Jia·Y. Jin·K. K. Joo·K. H. Kang·G. Karyan·B. H. Kim·C. H. Kim·D. Y. Kim·S. H. Kim·Y. -K. Kim·K. Kinoshita·P. Kodyš·T. Konno·S. Korpar·D. Kotchetkov·P. Križan·P. Krokovny·R. Kulasiri·M. Kumar·R. Kumar·K. Kumara·Y. -J. Kwon·K. Lalwani·S. C. Lee·J. Li·L. K. Li·Y. B. Li·L. Li Gioi·J. Libby·Z. Liptak·D. Liventsev·C. MacQueen·M. Masuda
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Abstract

We report the measurement of branching fractions and $CP$-violation asymmetries in $B\to \phi \phi K$ decays based on a $711\,{\rm fb}^{-1}$ data sample containing $772\times 10^6$ $B\bar{B}$ events. The data were recorded at the $\Upsilon (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. For $B^+ \to \phi \phi K^+$, the branching fraction and $CP$-violation asymmetry measured below the $\eta_{c}$ threshold ($m_{\phi\phi}<2.85\,{\rm GeV}/c^2$) are $[3.43^{\,+\,0.48}_{\,-\,0.46}({\rm stat})\pm 0.22({\rm syst})] \times10^{-6}$ and $-0.02\pm0.11({\rm stat})\pm0.01({\rm syst})$, respectively. Similarly, the branching fraction obtained for $B^0 \to\phi\phi K^0$ below the $\eta_{c}$ threshold is $[3.02^{\,+\,0.75}_{\,-\,0.66} ({\rm stat})\pm \,0.20({\rm syst})]\times10^{-6}$. We also measure the $CP$-violation asymmetry for $B^+ \to\phi\phi K^+$ within the $\eta_{c}$ region ($m_{\phi\phi}\in [2.94,3.02]\,{\rm GeV}/c^2$) to be $+0.12\pm0.12({\rm stat})\pm0.01({\rm syst})$.

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S. Mohanty, A. B. Kaliyar, V. Gaur, G. B. Mohanty, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, T. Aziz, V. Babu, S. Bahinipati, P. Behera, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, T. Ferber, B. G. Fulsom, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, Y. -K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, Y. -J. Kwon, K. Lalwani, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, Z. Liptak, D. Liventsev, C. MacQueen, M. Masuda. 2021-01-19. Measurement of Branching Fraction and Search for $CP$ Violation in $B\to \phi \phi K$. https://doi.org/10.1103/physrevd.103.052013

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