Measurement of the Branching Fractions of the Radiative Leptonic τ Decays τ → eγν[bar over ν] and τ → μγν[bar over ν] at BABAR

• Main Authors: Lees, J. P (Author), Poireau, V. (Author), Tisserand, V. (Author), Grauges, E. (Author), Palano, A. (Author), Eigen, G. (Author), Stugu, B. (Author), Brown, D. N (Author), Kerth, L. T (Author), Kolomensky, Yu. G (Author), Lee, M. J (Author), Lynch, G. (Author), Koch, H. (Author), Schroeder, T. (Author), Hearty, C. (Author), Mattison, T. S (Author), McKenna, J. A (Author), So, R. Y (Author), Khan, A. (Author), Blinov, V. E (Author), Buzykaev, A. R (Author), Druzhinin, V. P (Author), Golubev, V. B (Author), Kravchenko, E. A (Author), Onuchin, A. P (Author), Serednyakov, S. I (Author), Skovpen, Yu. I (Author), Solodov, E. P (Author), Todyshev, K. Yu (Author), Lankford, A. J (Author), Dey, B. (Author), Gary, J. W (Author), Long, O. (Author), Franco Sevilla, M. (Author), Hong, T. M (Author), Kovalskyi, D. (Author), Richman, J. D (Author), West, C. A (Author), Eisner, A. M (Author), Lockman, W. S (Author), Panduro Vazquez, W. (Author), Schumm, B. A (Author), Seiden, A. (Author), Chao, D. S (Author), Cheng, C. H (Author), Echenard, B. (Author), Flood, K. T (Author), Hitlin, D. G (Author), Miyashita, T. S (Author), Ongmongkolkul, P. (Author), Porter, F. C (Author), Röhrken, M. (Author), Andreassen, R. (Author), Huard, Z. (Author), Meadows, B. T (Author), Pushpawela, B. G (Author), Sokoloff, M. D (Author), Sun, L. (Author), Bloom, P. C (Author), Ford, W. T (Author), Gaz, A. (Author), Smith, J. G (Author), Wagner, S. R (Author), Ayad, R. (Author), Toki, W. H (Author), Spaan, B. (Author), Bernard, D. (Author), Verderi, M. (Author), Playfer, S. (Author), Bettoni, D. (Author), Bozzi, C. (Author), Calabrese, R. (Author), Cibinetto, G. (Author), Fioravanti, E. (Author), Garzia, I. (Author), Luppi, E. (Author), Piemontese, L. (Author), Santoro, V. (Author), Calcaterra, A. (Author), de Sangro, R. (Author), Finocchiaro, G. (Author), Martellotti, S. (Author), Patteri, P. (Author), Peruzzi, I. M (Author), Piccolo, M. (Author), Rama, M. (Author), Zallo, A. (Author), Contri, R. (Author), Monge, M. R (Author), Passaggio, S. (Author), Patrignani, C. (Author), Bhuyan, B. (Author), Prasad, V. (Author), Adametz, A. (Author), Uwer, U. (Author), Lacker, H. M (Author), Mallik, U. (Author), Chen, C. (Author), Cochran, J. (Author), Prell, S. (Author), Ahmed, H. (Author), Gritsan, A. V (Author), Arnaud, N. (Author), Davier, M. (Author), Derkach, D. (Author), Grosdidier, G. (Author), Le Diberder, F. (Author), Lutz, A. M (Author), Malaescu, B. (Author), Roudeau, P. (Author), Stocchi, A. (Author), Wormser, G. (Author), Lange, D. J (Author), Wright, D. M (Author), Coleman, J. P (Author), Fry, J. R (Author), Gabathuler, E. (Author), Hutchcroft, D. E (Author), Payne, D. J (Author), Touramanis, C. (Author), Bevan, A. J (Author), Di Lodovico, F. (Author), Sacco, R. (Author), Cowan, G. (Author), Davis, C. L (Author), Denig, A. G (Author), Fritsch, M. (Author), Gradl, W. (Author), Griessinger, K. (Author), Hafner, A. (Author), Schubert, K. R (Author), Barlow, R. J (Author), Lafferty, G. D (Author), Cenci, R. (Author), Hamilton, B. (Author), Jawahery, A. (Author), Roberts, D. A (Author), Cheaib, R. (Author), Patel, P. M (Author), Robertson, S. H (Author), Neri, N. (Author), Palombo, F. (Author), Cremaldi, L. (Author), Godang, R. (Author), Summers, D. J (Author), Simard, M. (Author), Taras, P. (Author), De Nardo, G. (Author), Onorato, G. (Author), Sciacca, C. (Author), Raven, G. (Author), Jessop, C. P (Author), LoSecco, J. M (Author), Honscheid, K. (Author), Kass, R. (Author), Margoni, M. (Author), Morandin, M. (Author), Posocco, M. (Author), Rotondo, M. (Author), Simi, G. (Author), Simonetto, F. (Author), Stroili, R. (Author), Akar, S. (Author), Ben-Haim, E. (Author), Bomben, M. (Author), Bonneaud, G. R (Author), Briand, H. (Author), Calderini, G. (Author), Chauveau, J. (Author), Leruste, Ph (Author), Marchiori, G. (Author), Ocariz, J. (Author), Biasini, M. (Author), Manoni, E. (Author), Rossi, A. (Author), Angelini, C. (Author), Batignani, G. (Author), Bettarini, S. (Author), Carpinelli, M. (Author), Casarosa, G. (Author), Chrzaszcz, M. (Author), Forti, F. (Author), Giorgi, M. A (Author), Lusiani, A. (Author), Oberhof, B. (Author), Paoloni, E. (Author), Rizzo, G. (Author), Walsh, J. J (Author), Lopes Pegna, D. (Author), Olsen, J. (Author), Smith, A. J. S (Author), Anulli, F. (Author), Faccini, R. (Author), Ferrarotto, F. (Author), Ferroni, F. (Author), Gaspero, M. (Author), Pilloni, A. (Author), Piredda, G. (Author), Bünger, C. (Author), Dittrich, S. (Author), Grünberg, O. (Author), Hess, M. (Author), Leddig, T. (Author), Voß, C. (Author), Waldi, R. (Author), Adye, T. (Author), Olaiya, E. O (Author), Wilson, F. F (Author), Emery, S. (Author), Vasseur, G. (Author), Aston, D. (Author), Bard, D. J (Author), Cartaro, C. (Author), Convery, M. R (Author), Dorfan, J. (Author), Dubois-Felsmann, G. P (Author), Dunwoodie, W. (Author), Ebert, M. (Author), Field, R. C (Author), Fulsom, B. G (Author), Graham, M. T (Author), Hast, C. (Author), Innes, W. R (Author), Kim, P. (Author), Leith, D. W. G. S (Author), Lindemann, D. (Author), Luitz, S. (Author), Luth, V. (Author), Lynch, H. L (Author), MacFarlane, D. B (Author), Muller, D. R (Author), Neal, H. (Author), Perl, M. (Author), Pulliam, T. (Author), Ratcliff, B. N (Author), Roodman, A. (Author), Schindler, R. H (Author), Snyder, A. (Author), Su, D. (Author), Sullivan, M. K (Author), Va'vra, J. (Author), Wisniewski, W. J (Author), Wulsin, H. W (Author), Purohit, M. V (Author), Wilson, J. R (Author), Randle-Conde, A. (Author), Sekula, S. J (Author), Bellis, M. (Author), Burchat, P. R (Author), Puccio, E. M. T (Author), Alam, M. S (Author), Ernst, J. A (Author), Gorodeisky, R. (Author), Guttman, N. (Author), Peimer, D. R (Author), Soffer, A. (Author), Spanier, S. M (Author), Ritchie, J. L (Author), Schwitters, R. F (Author), Izen, J. M (Author), Lou, X. C (Author), Bianchi, F. (Author), De Mori, F. (Author), Filippi, A. (Author), Gamba, D. (Author), Lanceri, L. (Author), Vitale, L. (Author), Martinez-Vidal, F. (Author), Oyanguren, A. (Author), Villanueva-Perez, P. (Author), Albert, J. (Author), Banerjee, Sw (Author), Beaulieu, A. (Author), Bernlochner, F. U (Author), Choi, H. H. F (Author), King, G. J (Author), Kowalewski, R. (Author), Lewczuk, M. J (Author), Lueck, T. (Author), Nugent, I. M (Author), Roney, J. M (Author), Sobie, R. J (Author), Tasneem, N. (Author), Gershon, T. J (Author), Harrison, P. F (Author), Latham, T. E (Author), Band, H. R (Author), Dasu, S. (Author), Pan, Y. (Author), Prepost, R. (Author), Wu, S. L (Author), Cowan, Ray Franklin (Contributor)
• Other Authors: Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2015-04-07T19:50:50Z.
• Subjects: Article
• Online Access: Get fulltext

We perform a measurement of the τ → lγν[bar over ν] (l = e,μ) branching fractions for a minimum photon energy of 10 MeV in the τ rest frame, using 431  fb[superscript -1] of e[superscript +]e[superscript -] collisions collected at the center-of-mass energy of the ϒ(4S) resonance with the BABAR detector at the PEP-II storage rings. We find B(τ → μγν[bar over ν]) = (3.69 ± 0.03 ± 0.10) × 10[superscript -3] and B(τ → eγν[bar over ν]) = (1.847 ± 0.015 ± 0.052) × 10[superscript -2], where the first quoted error is statistical and the second is systematic. These results are substantially more precise than previous measurements.
United States. Dept. of Energy
National Science Foundation (U.S.)
United States-Israel Binational Science Foundation
Alfred P. Sloan Foundation