Details

Autor(en) / Beteiligte

• Grauges, E.
• Palano, A.
• Eigen, G.
• Stugu, B.
• Brown, D. N.
• Kerth, L. T.
• Lynch, G.
• Khan, A.
• Druzhinin, V. P.
• Kravchenko, E. A.
• Yushkov, A. N.
• Bondioli, M.
• Long, O.
• Richman, J. D.
• West, C. A.
• Lockman, W. S.
• Martinez, A. J.
• Seiden, A.
• Chao, D. S.
• Ongmongkolkul, P.
• Rakitin, A. Y.
• Ayad, R.
• Schwierz, R.
• Bernard, D.
• Verderi, M.
• Playfer, S.
• Bettoni, D.
• Bozzi, C.
• Luppi, E.
• Finocchiaro, G.
• Patteri, P.
• Piccolo, M.
• Contri, R.
• Monge, M. R.
• Passaggio, S.
• Bhuyan, B.
• Prasad, V.
• Morii, M.
• Uwer, U.
• Prell, S.
• Rubin, A. E.
• Arnaud, N.
• Davier, M.
• Derkach, D.
• Wright, D. M.
• Hutchcroft, D. E.
• Sigamani, M.
• Davis, C. L.
• Behn, E.
• Cenci, R.
• Cowan, R.
• Sonnek, P.
• Summers, D. J.
• Simard, M.
• Taras, P.
• De Nardo, G.
• Monorchio, D.
• Morandin, M.
• Akar, S.
• Ben-Haim, E.
• Briand, H.
• Hamon, O.
• Marchiori, G.
• Sitt, S.
• Carpinelli, M.
• Forti, F.
• Lusiani, A.
• Lopes Pegna, D.
• Olsen, J.
• Ferroni, F.
• Bünger, C.
• Voss, C.
• Hamel de Monchenault, G.
• Aston, D.
• Bard, D. J.
• Bartoldus, R.
• Convery, M. R.
• Field, R. C.
• Franco Sevilla, M.
• Gabareen, A. M.
• Kelsey, M. H.
• Kim, P.
• Leith, D. W. G. S.
• Muller, D. R.
• Neal, H.
• Snyder, A.
• Sullivan, M. K.
• Wagner, A. P.
• Wisniewski, W. J.
• Miyashita, T. S.
• Ernst, J. A.
• Gorodeisky, R.
• Spanier, S. M.
• Ruland, A. M.
• Izen, J. M.
• Gamba, D.
• Oyanguren, A.
• Lewczuk, M. J.
• Sobie, R. J.
• Pan, Y.

Titel

Evidence of B + → τ + ν decays with hadronic B tags

Ist Teil von

• Physical review. D, 2013-08, Vol.88 (3), Article 031102

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2013

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• We present a search for the decay B + → τ + ν using 467.8 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the SLAC PEP-II B -Factory. We select a sample of events with one completely reconstructed B − in the hadronic decay mode ( B − → D ( * ) 0 X − and B − → J / ψ X − ). We examine the rest of the event to search for a B + → τ + ν decay. We identify the τ + lepton in the following modes: τ + → e + ν ¯ ν , τ + → μ + ν ¯ ν , τ + → π + ¯ ν and τ + → ρ + ¯ ν . We find an excess of events with respect to the expected background, which excludes the null signal hypothesis at the level of 3.8 σ (including systematic uncertainties) and corresponds to a branching fraction value of B ( B + → τ + ν ) = ( 1.83 + 0.53 − 0.49 ( stat ) ± 0.24 ( syst ) ) × 10 − 4 .