Lepton-Flavor-Dependent Angular Analysis of B → Kℓ+ℓ-

Lepton-Flavor-Dependent Angular Analysis of B → Kℓ+ℓ-

Here, we present a measurement of angular observables and a test of lepton flavor universality in the B → K*ℓ+ℓ- decay, where ℓ is either e or μ . The analysis is performed on a data sample corresponding to an integrated luminosity of 711fb-1 containing 772×106 B B ¯ pairs, collected at the Υ ( 4S )...

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Veröffentlicht in:Physical review letters 2017-03, Vol.118 (11)
Hauptverfasser: Wehle, S., Niebuhr, C., Aihara, H., Asner, D. M., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bansal, V., Barberio, E., Bartel, W., Bhuyan, B., Biswal, J., Browder, T. E., Červenkov, D., Chekelian, V., Chilikin, K., Chistov, R., Cho, K., Cinabro, D., Doležal, Z., Epifanov, D., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Grzymkowska, O., Guido, E., Hara, T., Hayasaka, K., Hedges, M. T., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Jacobs, W. W., Jaegle, I., Jeon, H. B., Julius, T., Kang, K. H., Karyan, G., Kichimi, H., Kiesling, C., Kim, H. J., Kim, K. T., Kim, M. J., Korpar, S., Križan, P., Krokovny, P., Kulasiri, R., Kumita, T., Kwon, Y. -J., Lange, J. S., Li, L., Li Gioi, L., Libby, J., Mizuk, R., Mohanty, G. B., Mussa, R., Nakano, E., Nakao, M., Natkaniec, Z., Nayak, M., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Pakhlova, G., Park, H., Paul, S., Pesántez, L., Pulvermacher, C., Rauch, J., Sakai, Y., Sandilya, S., Sanuki, T., Schneider, O., Schwartz, A. J., Seon, O., Shen, C. P., Shibata, T. -A., Simon, F., Starič, M., Sumisawa, K., Uchida, M., Uglov, T., Uno, S., Vahsen, S. E., Vorobyev, V., Vossen, A., Wang, P., Watanabe, M., Widmann, E., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zhilich, V., Zhukova, V., Zupanc, A.
Format: Artikel
Sprache:eng
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PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Zusammenfassung:Here, we present a measurement of angular observables and a test of lepton flavor universality in the B → K*ℓ+ℓ- decay, where ℓ is either e or μ . The analysis is performed on a data sample corresponding to an integrated luminosity of 711fb-1 containing 772×106 B B ¯ pairs, collected at the Υ ( 4S ) resonance with the Belle detector at the asymmetric-energy e+e- collider KEKB. The finding is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ .
ISSN:0031-9007
DOI:10.1103/PhysRevLett.118.111801