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  • Evidence for B + → h c K + ...
    Adachi, I.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Bansal, V.; Beleño, C.; Berger, M.; Bhardwaj, V.; Biswal, J.; Bobrov, A.; Bračko, M.; Campajola, M.; Chekelian, V.; Chen, A.; Cheon, B. G.; Choi, S.-K.; Choi, Y.; Cunliffe, S.; Di Carlo, S.; Doležal, Z.; Dong, T. V.; Epifanov, D.; Fast, J. E.; Garg, R.; Gaur, V.; Gelb, M.; Giri, A.; Grzymkowska, O.; Ishikawa, A.; Iwasaki, Y.; Jia, S.; Joo, K. K.; Kaliyar, A. B.; Kiesling, C.; Kim, D. Y.; Kim, S. H.; Kinoshita, K.; Korpar, S.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kwon, Y.-J.; Lange, J. S.; Lee, J. Y.; Lee, S. C.; Liventsev, D.; Lu, P.-C.; MacNaughton, J.; MacQueen, C.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Mori, T.; Nakao, M.; Nath, K. J.; Nayak, M.; Nishimura, K.; Pakhlova, G.; Pal, B.; Paul, S.; Pedlar, T. K.; Piilonen, L. E.; Popov, V.; Sandilya, S.; Sanuki, T.; Schnell, G.; Schwanda, C.; Seino, Y.; Sevior, M. E.; Shiu, J.-G.; Shwartz, B.; Simon, F.; Starič, M.; Stottler, Z. S.; Strube, J. F.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tenchini, F.; Trabelsi, K.; Uno, S.; Urquijo, P.; Usov, Y.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Wang, B.; Wang, C. H.; Wang, M.-Z.; Wang, P.; Watanuki, S.; Yang, S. B.; Yelton, J.; Yin, J. H.; Yuan, C. Z.; Zhang, J.; Zhilich, V.

    Physical review. D, 07/2019, Volume: 100, Issue: 1
    Journal Article

    A search for the decays B+ → hcK+ and B0 → hcKS0 is performed. Evidence for the decay B+ → hcK+ is found; its significance is 4.8σ . No evidence is found for B0 → hcKS0 . The branching fraction for B+ → hcK+ is measured to be ( 3.7-0.9+1.0 -0.8+0.8 ) ×10-5 ; the upper limit for the B0 → hcKS0 branching fraction is 1.4×10-5 at 90% C.L. In addition, a study of the p p ¯ π+π- invariant mass distribution in the channel B+ → ( p p ¯ π+π- ) K+ results in the first observation of the decay ηc ( 2S ) → p p ¯ π+π- with 12.1σ significance. The analysis is based on the 711 fb-1 data sample collected by the Belle detector at the asymmetric-energy e+e- collider KEKB at the γ ( 4S ) resonance.