Observation of the Decay Bs0 → K0 K ¯ 0

Observation of the Decay Bs0 → K0 K ¯ 0

We measure the decay B$^{0}_{s}$ → K0K¯0 using data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e– collider. The data sample used corresponds to an integrated luminosity of 121.4 fb–1. We measure a branching fraction B(B$^{0}_{s}$ → K0K¯0) = [19.6$^{+5.8}_{–5.1}$(stat.) ±...

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Veröffentlicht in:Physical review letters 2016-04, Vol.116 (16)
Hauptverfasser: Schwartz, A. J., Aihara, H., Ayad, R., Babu, V., Badhrees, I., Bahinipati, S., Bakich, A. M., Barberio, E., Behera, P., Bhuyan, B., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cheon, B. G., Cho, K., Chobanova, V., Drutskoy, A., Eidelman, S., Fast, J. E., Fulsom, B. G., Gaur, V., Gillard, R., Goh, Y. M., Goldenzweig, P., Grzymkowska, O., Hara, T., Hayashii, H., He, X. H., Inami, K., Ishikawa, A., Iwasaki, Y., Jacobs, W. W., Joffe, D., Julius, T., Kawasaki, T., Kim, H. J., Kim, K. T., Kinoshita, K., Križan, P., Krokovny, P., Kuhr, T., Kumar, R., Kumita, T., Li, H., Li, L., Li Gioi, L., Libby, J., Lukin, P., Luo, T., Masuda, M., Matvienko, D., Mizuk, R., Mohanty, G. B., Mohanty, S., Moll, A., Moon, H. K., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Pakhlov, P., Pakhlova, G., Park, H., Pedlar, T. K., Pesántez, L., Pestotnik, R., Rauch, J., Sahoo, H., Sakai, Y., Sanuki, T., Savinov, V., Schlüter, T., Schwanda, C., Seino, Y., Senyo, K., Shiu, J. -G., Simon, F., Stanič, S., Starič, M., Teramoto, Y., Trabelsi, K., Uno, S., Urquijo, P., Van Hulse, C., Varner, G., Vinokurova, A., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, X. L., Watanabe, M., Williams, K. M., Won, E., Yuan, C. Z., Yusa, Y., Zhilich, V., Zhulanov, V.
Format: Artikel
Sprache:eng
Schlagworte:
Bottom mesons, Kaons
Hadronic decays
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Beschreibung
Zusammenfassung:We measure the decay B$^{0}_{s}$ → K0K¯0 using data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e– collider. The data sample used corresponds to an integrated luminosity of 121.4 fb–1. We measure a branching fraction B(B$^{0}_{s}$ → K0K¯0) = [19.6$^{+5.8}_{–5.1}$(stat.) ± 1.0(sys.)±2.0(NB$^{0}_{s}$B¯$^{0}_{s}$)]×10–6 with a significance of 5.1 standard deviations. Here, this measurement constitutes the first observation of this decay.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.116.161801