Measurement of branching fraction and direct CP asymmetry in charmless B^+ to K^+K^- π^+ 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

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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. Bra\v{c}ko T. E. Browder V. Chekelian A. Chen K. Chilikin R. Chistov K. Cho Y. Choi D. Cinabro N. Dash S. Di Carlo Z. Dole\v{z}al Z. Dr\'asal 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. Kody\v{s} S. Korpar D. Kotchetkov P. Kri\v{z}an 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 E. Nakano M. Nakao T. Nanut K. J. Nath Z. Natkaniec M. Nayak N. K. Nisar S. Nishida S. Ogawa S. Okuno H. Ono Y. Onuki G. Pakhlova B. Pal C.-S. Park C. W. Park H. Park S. Paul L. Pes\'antez L. E. Piilonen A. Rostomyan Y. Sakai S. Sandilya T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda Y. Seino K. Senyo V. Shebalin T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon E. Solovieva M. Stari\v{c} J. F. Strube K. Sumisawa M. Takizawa F. Tenchini M. Uchida T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov C. Van Hulse G. Varner K. E. Varvell V. Vorobyev E. Waheed C. H. Wang M.-Z. Wang X. L. Wang M. Watanabe Y. Watanabe E. Widmann K. M. Williams E. Won Y. Yamashita H. Ye Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc

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keywords asymmetrydirectbellebranchingcharmlessfractionregionaddition

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

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