Measurement of branching fraction and search for CP violation in B →φφK

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. M. Aulchenko,T. Aushev,Tariq Aziz, V. Babu,Seema Bahinipati, P. K. Behera,Martin Florian Bessner, V. Bhardwaj,T. Bilka,Jyoti Prakash 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, Somnath 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. K. 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,Motoki Iwasaki,W. W. Jacobs,H. B. Jeon, S. Jia,Ya-Qiu Jin, K. K. Joo, K. H. Kang, G. Karyan, B. H. Kim, C. H. Kim,D. Y. Kim,Seok Kim,Yongsun Kim,K. Kinoshita,Peter Kodys, T. Konno, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, R. Kulasiri,Mukesh Kumar,Rahul Kumar, K. Kumara,Y. J. Kwon, K. Lalwani,Shih-Chang Lee, J. Li,L. K. Li, Y. B. Li,L. Li Gioi, J. Libby,Z. J. Liptak, D. Liventsev, C. MacQueen, M. Masuda

Physical Review D（2021）

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摘要

We report the measurement of branching fractions and CP-violation asymmetries in B→φφK decays based on a 711 fb-1 data sample containing 772×106 BB¯ events. The data were recorded at the I(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For B+→φφK+, the branching fraction and CP-violation asymmetry measured below the ηc threshold (mφφ<2.85 GeV/c2) are [3.43-0.46+0.48(stat)±0.22(syst)]×10-6 and -0.02±0.11(stat)±0.01(syst), respectively. Similarly, the branching fraction obtained for B0→φφK0 below the ηc threshold is [3.02-0.66+0.75(stat)±0.20(syst)]×10-6. We also measure the CP-violation asymmetry for B+→φφK+ within the ηc region (mφφ[2.94,3.02] GeV/c2) to be +0.12±0.12(stat)±0.01(syst).

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