Measurement of the branching fraction of B+ →τ+ντ decays with the semileptonic tagging method

Date Issued
17-09-2015
Author(s)
Kronenbitter, B.
Heck, M.
Goldenzweig, P.
Kuhr, T.
Abdesselam, A.
Adachi, I.
Aihara, H.
Al Said, S.
Arinstein, K.
Asner, D. M.
Aushev, T.
Ayad, R.
Aziz, T.
Bakich, A. M.
Bansal, V.
Barberio, E.
Bhardwaj, V.
Bondar, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
ÄŒervenkov, D.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Chistov, R.
Cho, K.
Chobanova, V.
Choi, Y.
Cinabro, D.
Dalseno, J.
Danilov, M.
Dingfelder, J.
DoleŽal, Z.
Drásal, Z.
Drutskoy, A.
Dutta, D.
Eidelman, S.
Epifanov, D.
Farhat, H.
Fast, J. E.
Ferber, T.
Frost, O.
Fulsom, B. G.
Gaur, V.
Gabyshev, N.
Garmash, A.
Getzkow, D.
Gillard, R.
Glattauer, R.
Golob, B.
Grygier, J.
Hayasaka, K.
Hayashii, H.
He, X. H.
Heider, M.
Heller, A.
Horiguchi, T.
Huschle, M.
Iijima, T.
Inami, K.
Ishikawa, A.
Itoh, R.
Iwasaki, Y.
Jaegle, I.
Joo, K. K.
Julius, T.
Kang, K. H.
Kato, E.
Kim, D. Y.
Kim, H. J.
Kim, J. B.
Kim, J. H.
Kim, K. T.
Kim, M. J.
Kim, S. H.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Kodyš, P.
KriŽan, P.
Krokovny, P.
Kuzmin, A.
Kwon, Y. J.
Lange, J. S.
Lee, D. H.
Lee, I. S.
Lewis, P.
Li Gioi, L.
Indian Institute of Technology, Madras
Liventsev, D.
Lukin, P.
Matvienko, D.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Mohanty, S.
Moll, A.
DOI
Abstract
We report a measurement of the branching fraction of B+→τ+ντ decays using a data sample of 772×106BB¯ pairs, collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct the accompanying B meson in a semileptonic decay and detect the recoiling B candidate in the decay channel B+→τ+ντ. We obtain a branching fraction of B(B+→τ+ντ)=[1.25±0.28(stat.)±0.27(syst.)]×10-4. This result is in good agreement with previous measurements and the expectation from the calculation based on the Standard Model.
Volume
92