Angular analysis of the low $K^{+}K^{-}$ invariant mass enhancement in $B^{+}\to K^{+}K^{-}\pi^{+}$ decays

A. B. Kaliyar; A. Bobrov; A. Bozek; A. Budano; A. Chen; A. Garmash; A. Giri; A. Ishikawa; A. Korobov; A. Kuzmin

arxiv: 2206.11445 · v2 · pith:JRGFQCBXnew · submitted 2022-06-23 · ✦ hep-ex

Angular analysis of the low K⁺K⁻ invariant mass enhancement in B⁺to K⁺K⁻π⁺ decays

Belle Collaboration: C.-L. Hsu , M. E. Sevior , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , V. Aulchenko

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T. Aushev R. Ayad V. Babu S. Bahinipati M. Bauer P. Behera K. Belous J. Bennett M. Bessner V. Bhardwaj B. Bhuyan T. Bilka J. Biswal T. Bloomfield A. Bobrov A. Bozek M. Bra\v{c}ko P. Branchini T. E. Browder A. Budano M. Campajola D. \v{C}ervenkov M.-C. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe S. Das N. Dash G. De Nardo G. De Pietro R. Dhamija F. Di Capua J. Dingfelder Z. Dole\v{z}al T. V. Dong D. Dossett S. Dubey D. Epifanov T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig E. Graziani T. Gu K. Gudkova C. Hadjivasiliou S. Halder T. Hara O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou K. Inami A. Ishikawa R. Itoh M. Iwasaki W. W. Jacobs E.-J. Jang S. Jia Y. Jin K. K. Joo A. B. Kaliyar K. H. Kang C. Kiesling C. H. Kim D. Y. Kim Y.-K. Kim T. D. Kimmel P. Kody\v{s} T. Konno A. Korobov S. Korpar E. Kovalenko P. Kri\v{z}an P. Krokovny T. Kuhr R. Kulasiri K. Kumara A. Kuzmin Y.-J. Kwon Y.-T. Lai J. S. Lange M. Laurenza S. C. Lee J. Li L. K. Li Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev C. MacQueen M. Masuda T. Matsuda D. Matvienko F. Meier M. Merola F. Metzner K. Miyabayashi R. Mizuk G. B. Mohanty M. Nakao Z. Natkaniec A. Natochii L. Nayak M. Nayak M. Niiyama N. K. Nisar S. Nishida S. Ogawa H. Ono Y. Onuki P. Oskin P. Pakhlov G. Pakhlova S. Pardi H. Park S.-H. Park A. Passeri S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik E. Prencipe M. T. Prim A. Rostomyan N. Rout G. Russo D. Sahoo S. Sandilya A. Sangal L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. Shapkin C. Sharma C. P. Shen J.-G. Shiu B. Shwartz A. Sokolov E. Solovieva M. Stari\v{c} Z. S. Stottler M. Sumihama K. Sumisawa T. Sumiyoshi M. Takizawa U. Tamponi K. Tanida Y. Tao F. Tenchini M. Uchida T. Uglov Y. Unno S. Uno R. van Tonder G. Varner K. E. Varvell A. Vinokurova E. Waheed C. H. Wang E. Wang X. L. Wang M. Watanabe S. Watanuki E. Won X. Xu B. D. Yabsley W. Yan S. B. Yang H. Ye J. Yelton J. H. Yin Z. P. Zhang V. Zhilich V. Zhukova

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keywords angularasymmetrybranchingdirectbinsdecaydifferentialdistribution

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We study the decay $B^{+} \to K^+ K^- \pi^+$ and investigate the angular distribution of $K^{+}K^{-}$ pairs with invariant mass below $1.1$ GeV/$c^2$. This region exhibits both a strong enhancement in signal and very large direct $CP$ violation. We construct a coherent sum model for the angular distribution of $S$- and $P$-wave, and report the ratio of their amplitudes, the relative phase and the forward-backward asymmetry. We also report absolute differential branching fractions and direct $CP$ asymmetry for the decay in bins of $M_{K^+K^-}$ and the differential branching fractions in bins of $M_{K^+\pi^-}$. 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 overall 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.

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Angular analysis of the low K⁺K⁻ invariant mass enhancement in B⁺to K⁺K⁻π⁺ decays

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