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arXiv · 1705.02640

Measurement of branching fraction and direct $CP$ asymmetry in charmless $B^+ \to K^+K^- \pi^+$ decays at Belle

Belle Collaboration·C. -L. Hsu·D. Dossett·M. E. Sevior·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·I. Badhrees·A. M. Bakich·E. Barberio·P. Behera·M. Berger·V. Bhardwaj·B. Bhuyan·J. Biswal·T. Bloomfield·A. Bondar·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·V. Chekelian·A. Chen·K. Chilikin·R. Chistov·K. Cho·Y. Choi·D. Cinabro·N. Dash·S. Di Carlo·Z. Doležal·Z. Drásal·S. Eidelman·H. Farhat·J. E. Fast·B. G. Fulsom·V. Gaur·N. Gabyshev·A. Garmash·P. Goldenzweig·B. Golob·O. Grzymkowska·E. Guido·T. Hara·K. Hayasaka·H. Hayashii·M. T. Hedges·W. -S. Hou·K. Inami·G. Inguglia·A. Ishikawa·W. W. Jacobs·I. Jaegle·H. B. Jeon·Y. Jin·D. Joffe·K. K. Joo·T. Julius·A. B. Kaliyar·K. H. Kang·P. Katrenko·T. Kawasaki·C. Kiesling·D. Y. Kim·H. J. Kim·J. B. Kim·K. T. Kim·M. J. Kim·S. H. Kim·P. Kodyš·S. Korpar·D. Kotchetkov·P. Križan·P. Krokovny·T. Kuhr·R. Kulasiri·A. Kuzmin·Y. -J. Kwon·Y. -T. Lai·J. S. Lange·C. H. Li·L. Li·L. Li Gioi·J. Libby·D. Liventsev·M. Lubej·T. Luo·M. Masuda·T. Matsuda·D. Matvienko·K. Miyabayashi·H. Miyata·R. Mizuk·G. B. Mohanty·T. Mori·R. Mussa
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Abstract

We report a study of the charmless hadronic decay of the charged $B$ meson to the three-body final state $K^+ K^- \pi^+$. The results are based on a data sample that contains $772\times10^6$ $B \bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The measured inclusive branching fraction and the direct $CP$ asymmetry are $(5.38\pm0.40\pm0.35)\times 10^{-6}$ and $-0.170\pm0.073\pm0.017$, respectively, where the first uncertainties are statistical and the second are systematic. The $K^{+}K^{-}$ invariant mass distribution of the signal candidates shows an excess in the region below $1.5$ GeV/$c^2$, which is consistent with the previous studies from BaBar and LHCb. In addition, strong evidence of a large direct $CP$ asymmetry is found in the $K^{+}K^{-}$ low-invariant-mass region.

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Belle Collaboration, C. -L. Hsu, D. Dossett, M. E. Sevior, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, T. Bloomfield, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, A. Chen, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, S. Eidelman, H. Farhat, J. E. Fast, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, B. Golob, O. Grzymkowska, E. Guido, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, K. Inami, G. Inguglia, A. Ishikawa, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, Y. -T. Lai, J. S. Lange, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa. 2017-05-07. Measurement of branching fraction and direct $CP$ asymmetry in charmless $B^+ \to K^+K^- \pi^+$ decays at Belle. https://doi.org/10.1103/physrevd.96.031101

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