Inclusive and exclusive measurements of B decays to χc1 and χc2 at Belle

We report inclusive and exclusive measurements for χc1 and χc2 production in B decays. We measure B(B → χc1X)= (3.03 ± 0.05(stat) ± 0.24(syst)) × 10$-$3 and B(B → χc2X)= (0.70 ± 0.06(stat) ± 0.10(syst)) × 10$-$3 . For the first time, χc2 production in exclusive B decays in the modes B0 → χc2π $-$K+...

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Veröffentlicht in:	Physical review. D 2016-03, Vol.93 (5)
Hauptverfasser:	Abdesselam, A., Adachi, I., Al Said, S., Aulchenko, V., Ayad, R., Badhrees, I., Bahinipati, S., Bala, A., Bansal, V., Barberio, E., Biswal, J., Bobrov, A., Bondar, A., Bozek, A., Browder, T. E., Chen, A., Cheon, B. G., Choi, S. -K., Choi, Y., Cinabro, D., Dalseno, J., Doležal, Z., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Frost, O., Gabyshev, N., Ganguly, S., Garmash, A., Gillard, R., Glattauer, R., Greenwald, D., Haba, J., Hayasaka, K., He, X. H., Hou, W. -S., Iijima, T., Inami, K., Itoh, R., Kato, E., Kim, S. H., Kinoshita, K., Kobayashi, N., Korpar, S., Kumar, R., Kuzmin, A., Lee, I. S., Li Gioi, L., Liventsev, D., Loos, A., Lukin, P., Masuda, M., Matvienko, D., Miyata, H., Mizuk, R., Mohanty, S., Nanut, T., Nisar, N. K., Ogawa, S., Pakhlova, G., Pal, B., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Pulvermacher, C., Ribežl, E., Rostomyan, A., Sahoo, H., Sakai, Y., Sato, Y., Savinov, V., Schnell, G., Seino, Y., Semmler, D., Senyo, K., Sevior, M. E., Shibata, T. -A., Shwartz, B., Simon, F., Sokolov, A., Starič, M., Sumihama, M., Tamponi, U., Uchida, M., Unno, Y., Usov, Y., Van Hulse, C., Varner, G., Vinokurova, A., Vorobyev, V., Wang, M. -Z., Watanabe, Y., Won, E., Yamaoka, J., Yashchenko, S., Yusa, Y., Zhang, Z. P., Zhilich, V., Zupanc, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Belle II, Belle, B Decays
Online-Zugang:	Volltext
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Zusammenfassung:	We report inclusive and exclusive measurements for χc1 and χc2 production in B decays. We measure B(B → χc1X)= (3.03 ± 0.05(stat) ± 0.24(syst)) × 10$-$3 and B(B → χc2X)= (0.70 ± 0.06(stat) ± 0.10(syst)) × 10$-$3 . For the first time, χc2 production in exclusive B decays in the modes B0 → χc2π $-$K+ and B+ → χc2π+π$-$K+ has been observed, along with first evidence for the B+ → χc2π+K$0\atop{S}$ decay mode. For χc1 production, we report the first observation in the B+ → χc1π+π$-$K+, B0 → χc1π+π$-$K$0\atop{S}$ and B0 → χc1π0π$-$K+ decay modes. Using these decay modes, we observe a difference in the production mechanism of χc2 in comparison to χc1 in B decays. In addition, we report searches for X(3872) and χc1(2P) in the B+ → (χc1π+π$-$)K+ decay 3 mode. The reported results use 772 × 106 B$\overline{B}$ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e$-$ collider.
ISSN:	2470-0010
DOI:	10.1103/PhysRevD.93.052016