We present the results of a search for the rare flavor-changing neutral-current decays B→πℓ+ℓ− (π=π±, π0 and ℓ=e, μ) and B0→ηℓ+ℓ− using a sample of e+e−→Υ(4S)→BB¯¯¯ decays corresponding to 428 fb−1 of integrated luminosity collected by the BABAR detector. No significant signal is observed, and we set an upper limit on the isospin and lepton-flavor averaged branching fraction of B(B→πℓ+ℓ−)<5.9×10−8 and a lepton-flavor averaged upper limit of B(B0→ηℓ+ℓ−)<6.4×10−8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+→π+e+e−, B0→π0e+e−, B+→π+μ+μ−, B0→π0μ+μ−, B0→ηe+e−, and B0→ημ+μ−.
Search for the rare decays B→πℓ^{+}ℓ^{-} and B^{0}→ηℓ^{+}ℓ^{-} / J.P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L.T. Kerth, Y..G. Kolomensky, G. Lynch, H. Koch, T. Schroeder, C. Hearty, T.S. Mattison, J.A. Mckenna, R.Y. So, A. Khan, V.E. Blinov, A.R. Buzykaev, V.P. Druzhinin, V.B. Golubev, E.A. Kravchenko, A.P. Onuchin, S.I. Serednyakov, Y.I. Skovpen, E.P. Solodov, K.Y. Todyshev, A.N. Yushkov, D. Kirkby, A.J. Lankford, M. Mandelkern, B. Dey, J.W. Gary, O. Long, G.M. Vitug, C. Campagnari, M. Franco Sevilla, T.M. Hong, D. Kovalskyi, J.D. Richman, C.A. West, A.M. Eisner, W.S. Lockman, A.J. Martinez, B.A. Schumm, A. Seiden, D.S. Chao, C.H. Cheng, B. Echenard, K.T. Flood, D.G. Hitlin, P. Ongmongkolkul, F.C. Porter, R. Andreassen, Z. Huard, B.T. Meadows, M.D. Sokoloff, L. Sun, P.C. Bloom, W.T. Ford, A. Gaz, U. Nauenberg, J.G. Smith, S.R. Wagner, R. Ayad, W.H. Toki, B. Spaan, K.R. Schubert, R. Schwierz, D. Bernard, M. Verderi, S. Playfer, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, L. Piemontese, V. Santoro, R. Baldini Ferroli, A. Calcaterra, R. De Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I.M. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M.R. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, M. Morii, A. Adametz, U. Uwer, H.M. Lacker, P.D. Dauncey, U. Mallik, C. Chen, J. Cochran, W.T. Meyer, S. Prell, A.E. Rubin, A.V. Gritsan, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A.M. Lutz, B. Malaescu, P. Roudeau, A. Stocchi, G. Wormser, D.J. Lange, D.M. Wright, J.P. Coleman, J.R. Fry, E. Gabathuler, D.E. Hutchcroft, D.J. Payne, C. Touramanis, A.J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, J. Bougher, D.N. Brown, C.L. Davis, A.G. Denig, M. Fritsch, W. Gradl, K. Griessinger, A. Hafner, E. Prencipe, R.J. Barlow, G.D. Lafferty, E. Behn, R. Cenci, B. Hamilton, A. Jawahery, D.A. Roberts, R. Cowan, D. Dujmic, G. Sciolla, R. Cheaib, P.M. Patel, S.H. Robertson, P. Biassoni, N. Neri, F. Palombo, L. Cremaldi, R. Godang, P. Sonnek, D.J. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, M. Martinelli, G. Raven, C.P. Jessop, J.M. Losecco, K. Honscheid, R. Kass, J. Brau, R. Frey, N.B. Sinev, D. Strom, E. Torrence, E. Feltresi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben Haim, M. Bomben, G.R. Bonneaud, H. Briand, G. Calderini, J. Chauveau, P. Leruste, G. Marchiori, J. Ocariz, S. Sitt, M. Biasini, E. Manoni, S. Pacetti, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M.A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, A. Perez, G. Rizzo, J.J. Walsh, D. Lopes Pegna, J. Olsen, A.J.S. Smith, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, G. Piredda, C. Bünger, O. Grünberg, T. Hartmann, T. Leddig, C. Voß, R. Waldi, T. Adye, E.O. Olaiya, F.F. Wilson, S. Emery, G. Hamel De Monchenault, G. Vasseur, C. Yèche, F. Anulli, D. Aston, D.J. Bard, J.F. Benitez, C. Cartaro, M.R. Convery, J. Dorfan, G.P. Dubois Felsmann, W. Dunwoodie, M. Ebert, R.C. Field, B.G. Fulsom, A.M. Gabareen, M.T. Graham, C. Hast, W.R. Innes, P. Kim, M.L. Kocian, D.W.G.S. Leith, P. Lewis, D. Lindemann, B. Lindquist, S. Luitz, V. Luth, H.L. Lynch, D.B. Macfarlane, D.R. Muller, H. Neal, S. Nelson, M. Perl, T. Pulliam, B.N. Ratcliff, A. Roodman, A.A. Salnikov, R.H. Schindler, A. Snyder, D. Su, M.K. Sullivan, J. Va'Vra, A.P. Wagner, W.F. Wang, W.J. Wisniewski, M. Wittgen, D.H. Wright, H.W. Wulsin, V. Ziegler, W. Park, M.V. Purohit, R.M. White, J.R. Wilson, A. Randle Conde, S.J. Sekula, M. Bellis, P.R. Burchat, T.S. Miyashita, E.M.T. Puccio, M.S. Alam, J.A. Ernst, R. Gorodeisky, N. Guttman, D.R. Peimer, A. Soffer, S.M. Spanier, J.L. Ritchie, A.M. Ruland, R.F. Schwitters, B.C. Wray, J.M. Izen, X.C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, S. Zambito, L. Lanceri, L. Vitale, F. Martinez Vidal, A. Oyanguren, P. Villanueva Perez, H. Ahmed, J. Albert, S. Banerjee, F.U. Bernlochner, H.H.F. Choi, G.J. King, R. Kowalewski, M.J. Lewczuk, T. Lueck, I.M. Nugent, J.M. Roney, R.J. Sobie, N. Tasneem, T.J. Gershon, P.F. Harrison, T.E. Latham, H.R. Band, S. Dasu, Y. Pan, R. Prepost, S.L. Wu. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 88:3(2013), pp. 032012.1-032012.16. [10.1103/PhysRevD.88.032012]
Search for the rare decays B→πℓ^{+}ℓ^{-} and B^{0}→ηℓ^{+}ℓ^{-}
N. Neri;F. Palombo;
2013
Abstract
We present the results of a search for the rare flavor-changing neutral-current decays B→πℓ+ℓ− (π=π±, π0 and ℓ=e, μ) and B0→ηℓ+ℓ− using a sample of e+e−→Υ(4S)→BB¯¯¯ decays corresponding to 428 fb−1 of integrated luminosity collected by the BABAR detector. No significant signal is observed, and we set an upper limit on the isospin and lepton-flavor averaged branching fraction of B(B→πℓ+ℓ−)<5.9×10−8 and a lepton-flavor averaged upper limit of B(B0→ηℓ+ℓ−)<6.4×10−8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+→π+e+e−, B0→π0e+e−, B+→π+μ+μ−, B0→π0μ+μ−, B0→ηe+e−, and B0→ημ+μ−.
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