Evidence for $B^{+}\to h_c{K}^{+}$ and observation of ${\eta }_c\left(2S\right)\to p\overline{p}{\pi }^{+}{\pi }^{-}$

Journal Article · Wed Jul 10 00:00:00 EDT 2019 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.100.012001· OSTI ID:1532807

Chilikin, K.; Adachi, I.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bansal, V.; Behera, P.; Beleño, C.; Berger, M.; Bhardwaj, V.; Bilka, T.; Biswal, J.; Bobrov, A.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E. ; Campajola, M.; Cao, L.; Červenkov, D.; Chekelian, V.; Chen, A.; Cheon, B. G.; Cho, K.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Cunliffe, S.; Di Carlo, S.; Doležal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Giri, A.; Goldenzweig, P.; Grzymkowska, O.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hou, W. -S.; Hsu, C. -L.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jia, S.; Jin, Y.; Joffe, D.; Joo, K. K.; Julius, T.; Kaliyar, A. B.; Karyan, G.; Kato, Y.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, S. H.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Kroeger, R.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kwon, Y. -J.; Lalwani, K.; Lange, J. S.; Lee, J. K.; Lee, J. Y.; Lee, S. C.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lu, P. -C.; Luo, T.; MacNaughton, J.; MacQueen, C.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Mori, T.; Nakao, M.; Nath, K. J.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Nishimura, K.; Ono, H.; Onuki, Y.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Park, H.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Ritter, M.; Rostomyan, A.; Russo, G.; Sakai, Y.; Salehi, M.; Sandilya, S.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Strube, J. F.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uno, S.; Urquijo, P.; Usov, Y.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Wang, B.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, M.; Watanuki, S.; Won, E.; Yang, S. B.; Ye, H.; Yelton, J.; Yin, J. H.; Yuan, C. Z.; Zhang, J.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.

A search for the decays $B^{+}\to h_c{K}^{+}$ and $B^0\to h_c{K}_S^0$ is performed. Evidence for the decay $B^{+}\to h_c{K}^{+}$ is found; its significance is $4.8\sigma$. No evidence is found for $B^0\to h_c{K}_S^0$. The branching fraction for $B^{+}\to h_c{K}^{+}$ is measured to be $\left({3.7}_{-0.9}^{+1.0}{}_{-0.8}^{+0.8}\right)\times {10}^{-5}$; the upper limit for the $B^0\to h_c{K}_S^0$ branching fraction is $1.4\times {10}^{-5}$ at 90% C.L. In addition, a study of the $p\overline{p}{\pi }^{+}{\pi }^{-}$ invariant mass distribution in the channel $B^{+}\to \left(p\overline{p}{\pi }^{+}{\pi }^{-}\right)K^{+}$ results in the first observation of the decay ${\eta }_c\left(2S\right)\to p\overline{p}{\pi }^{+}{\pi }^{-}$ with $12.1\sigma$ significance. The analysis is based on the $711{\mathrm{fb}}^{-1}$ data sample collected by the Belle detector at the asymmetric-energy $e^{+}{e}^{-}$ collider KEKB at the $\mathrm{\gamma }\left(4S\right)$ resonance.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Univ. of Hawaii, Honolulu, HI (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); KEK, High Energy Accelerator Research Organization; Ministry of Education, Culture, Sports, Science and Technology
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0012704; AC05-76RL01830; SC0009973; SC0010504
• OSTI ID: 1532807
• Alternate ID(s): OSTI ID: 1542773; OSTI ID: 1568057; OSTI ID: 1593795
• Report Number(s): BNL-211874-2019-JAAM; PNNL-SA-147473; PRVDAQ; 012001
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Vol. 100 Journal Issue: 1; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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