Phys. Rev. D
79,
091101(R)
(2009)
[9 pages]
Search for the rare leptonic decays B+→l+νl (l=e,μ)
B. Aubert et al. BABAR Collaboration
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B. Aubert1, Y. Karyotakis1, J. P. Lees1, V. Poireau1, E. Prencipe1, X. Prudent1, V. Tisserand1, J. Garra Tico2, E. Grauges2, M. Martinelli3a,3b, A. Palano3a,3b, M. Pappagallo3a,3b, G. Eigen4, B. Stugu4, L. Sun4, M. Battaglia5, D. N. Brown5, L. T. Kerth5, Yu. G. Kolomensky5, G. Lynch5, I. L. Osipenkov5, K. Tackmann5, T. Tanabe5, C. M. Hawkes6, N. Soni6, A. T. Watson6, H. Koch7, T. Schroeder7, D. J. Asgeirsson8, B. G. Fulsom8, C. Hearty8, T. S. Mattison8, J. A. McKenna8, M. Barrett9, A. Khan9, A. Randle-Conde9, V. E. Blinov10, A. D. Bukin10,*, A. R. Buzykaev10, V. P. Druzhinin10, V. B. Golubev10, A. P. Onuchin10, S. I. Serednyakov10, Yu. I. Skovpen10, E. P. Solodov10, K. Yu. Todyshev10, M. Bondioli11, S. Curry11, I. Eschrich11, D. Kirkby11, A. J. Lankford11, P. Lund11, M. Mandelkern11, E. C. Martin11, D. P. Stoker11, S. Abachi12, C. Buchanan12, H. Atmacan13, J. W. Gary13, F. Liu13, O. Long13, G. M. Vitug13, Z. Yasin13, L. Zhang13, V. Sharma14, C. Campagnari15, T. M. Hong15, D. Kovalskyi15, M. A. Mazur15, J. D. Richman15, T. W. Beck16, A. M. Eisner16, C. A. Heusch16, J. Kroseberg16, W. S. Lockman16, A. J. Martinez16, T. Schalk16, B. A. Schumm16, A. Seiden16, L. Wang16, L. O. Winstrom16, C. H. Cheng17, D. A. Doll17, B. Echenard17, F. Fang17, D. G. Hitlin17, I. Narsky17, T. Piatenko17, F. C. Porter17, R. Andreassen18, G. Mancinelli18, B. T. Meadows18, K. Mishra18, M. D. Sokoloff18, P. C. Bloom19, W. T. Ford19, A. Gaz19, J. F. Hirschauer19, M. Nagel19, U. Nauenberg19, J. G. Smith19, S. R. Wagner19, R. Ayad20,†, A. Soffer20,‡, W. H. Toki20, R. J. Wilson20, E. Feltresi21, A. Hauke21, H. Jasper21, T. M. Karbach21, J. Merkel21, A. Petzold21, B. Spaan21, K. Wacker21, M. J. Kobel22, R. Nogowski22, K. R. Schubert22, R. Schwierz22, A. Volk22, D. Bernard23, G. R. Bonneaud23, E. Latour23, M. Verderi23, P. J. Clark24, S. Playfer24, J. E. Watson24, M. Andreotti25a,25b, D. Bettoni25a, C. Bozzi25a, R. Calabrese25a,25b, A. Cecchi25a,25b, G. Cibinetto25a,25b, E. Fioravanti25a,25b, P. Franchini25a,25b, E. Luppi25a,25b, M. Munerato25a,25b, M. Negrini25a,25b, A. Petrella25a,25b, L. Piemontese25a, V. Santoro25a,25b, R. Baldini-Ferroli26, A. Calcaterra26, R. de Sangro26, G. Finocchiaro26, S. Pacetti26, P. Patteri26, I. M. Peruzzi26,§, M. Piccolo26, M. Rama26, A. Zallo26, R. Contri27a,27b, E. Guido27a,27b, M. Lo Vetere27a,27b, M. R. Monge27a,27b, S. Passaggio27a, C. Patrignani27a,27b, E. Robutti27a, S. Tosi27a,27b, K. S. Chaisanguanthum28, M. Morii28, A. Adametz29, J. Marks29, S. Schenk29, U. Uwer29, F. U. Bernlochner30, V. Klose30, H. M. Lacker30, D. J. Bard31, P. D. Dauncey31, M. Tibbetts31, P. K. Behera32, M. J. Charles32, U. Mallik32, J. Cochran33, H. B. Crawley33, L. Dong33, V. Eyges33, W. T. Meyer33, S. Prell33, E. I. Rosenberg33, A. E. Rubin33, Y. Y. Gao34, A. V. Gritsan34, Z. J. Guo34, N. Arnaud35, J. Béquilleux35, A. D’Orazio35, M. Davier35, D. Derkach35, J. Firmino da Costa35, G. Grosdidier35, F. Le Diberder35, V. Lepeltier35, A. M. Lutz35, B. Malaescu35, S. Pruvot35, P. Roudeau35, M. H. Schune35, J. Serrano35, V. Sordini35,**, A. Stocchi35, G. Wormser35, D. J. Lange36, D. M. Wright36, I. Bingham37, J. P. Burke37, C. A. Chavez37, J. R. Fry37, E. Gabathuler37, R. Gamet37, D. E. Hutchcroft37, D. J. Payne37, C. Touramanis37, A. J. Bevan38, C. K. Clarke38, F. Di Lodovico38, R. Sacco38, M. Sigamani38, G. Cowan39, S. Paramesvaran39, A. C. Wren39, D. N. Brown40, C. L. Davis40, A. G. Denig41, M. Fritsch41, W. Gradl41, A. Hafner41, K. E. Alwyn42, D. Bailey42, R. J. Barlow42, G. Jackson42, G. D. Lafferty42, T. J. West42, J. I. Yi42, J. Anderson43, C. Chen43, A. Jawahery43, D. A. Roberts43, G. Simi43, J. M. Tuggle43, C. Dallapiccola44, E. Salvati44, S. Saremi44, R. Cowan45, D. Dujmic45, P. H. Fisher45, S. W. Henderson45, G. Sciolla45, M. Spitznagel45, R. K. Yamamoto45, M. Zhao45, P. M. Patel46, S. H. Robertson46, M. Schram46, A. Lazzaro47a,47b, V. Lombardo47a, F. Palombo47a,47b, S. Stracka47a,47b, J. M. Bauer48, L. Cremaldi48, R. Godang48,††, R. Kroeger48, P. Sonnek48, D. J. Summers48, H. W. Zhao48, M. Simard49, P. Taras49, H. Nicholson50, G. De Nardo51a,51b, L. Lista51a, D. Monorchio51a,51b, G. Onorato51a,51b, C. Sciacca51a,51b, G. Raven52, H. L. Snoek52, C. P. Jessop53, K. J. Knoepfel53, J. M. LoSecco53, W. F. Wang53, L. A. Corwin54, K. Honscheid54, H. Kagan54, R. Kass54, J. P. Morris54, A. M. Rahimi54, J. J. Regensburger54, S. J. Sekula54, Q. K. Wong54, N. L. Blount55, J. Brau55, R. Frey55, O. Igonkina55, J. A. Kolb55, M. Lu55, R. Rahmat55, N. B. Sinev55, D. Strom55, J. Strube55, E. Torrence55, G. Castelli56a,56b, N. Gagliardi56a,56b, M. Margoni56a,56b, M. Morandin56a, M. Posocco56a, M. Rotondo56a, F. Simonetto56a,56b, R. Stroili56a,56b, C. Voci56a,56b, P. del Amo Sanchez57, E. Ben-Haim57, H. Briand57, J. Chauveau57, O. Hamon57, Ph. Leruste57, G. Marchiori57, J. Ocariz57, A. Perez57, J. Prendki57, S. Sitt57, L. Gladney58, M. Biasini59a,59b, E. Manoni59a,59b, C. Angelini60a,60b, G. Batignani60a,60b, S. Bettarini60a,60b, G. Calderini60a,60b,‡‡, M. Carpinelli60a,60b,a, A. Cervelli60a,60b, F. Forti60a,60b, M. A. Giorgi60a,60b, A. Lusiani60a,60c, M. Morganti60a,60b, N. Neri60a,60b, E. Paoloni60a,60b, G. Rizzo60a,60b, J. J. Walsh60a, D. Lopes Pegna61, C. Lu61, J. Olsen61, A. J. S. Smith61, A. V. Telnov61, F. Anulli62a, E. Baracchini62a,62b, G. Cavoto62a, R. Faccini62a,62b, F. Ferrarotto62a, F. Ferroni62a,62b, M. Gaspero62a,62b, P. D. Jackson62a, L. Li Gioi62a, M. A. Mazzoni62a, S. Morganti62a, G. Piredda62a, F. Renga62a,62b, C. Voena62a, M. Ebert63, T. Hartmann63, H. Schröder63, R. Waldi63, T. Adye64, B. Franek64, E. O. Olaiya64, F. F. Wilson64, S. Emery65, L. Esteve65, G. Hamel de Monchenault65, W. Kozanecki65, G. Vasseur65, Ch. Yèche65, M. Zito65, M. T. Allen66, D. Aston66, R. Bartoldus66, J. F. Benitez66, R. Cenci66, J. P. Coleman66, M. R. Convery66, J. C. Dingfelder66, J. Dorfan66, G. P. Dubois-Felsmann66, W. Dunwoodie66, R. C. Field66, A. M. Gabareen66, M. T. Graham66, P. Grenier66, C. Hast66, W. R. Innes66, J. Kaminski66, M. H. Kelsey66, H. Kim66, P. Kim66, M. L. Kocian66, D. W. G. S. Leith66, S. Li66, B. Lindquist66, S. Luitz66, V. Luth66, H. L. Lynch66, D. B. MacFarlane66, H. Marsiske66, R. Messner66,*, D. R. Muller66, H. Neal66, S. Nelson66, C. P. O’Grady66, I. Ofte66, M. Perl66, B. N. Ratcliff66, A. Roodman66, A. A. Salnikov66, R. H. Schindler66, J. Schwiening66, A. Snyder66, D. Su66, M. K. Sullivan66, K. Suzuki66, S. K. Swain66, J. M. Thompson66, J. Va’vra66, A. P. Wagner66, M. Weaver66, C. A. West66, W. J. Wisniewski66, M. Wittgen66, D. H. Wright66, H. W. Wulsin66, A. K. Yarritu66, K. Yi66, C. C. Young66, V. Ziegler66, X. R. Chen67, H. Liu67, W. Park67, M. V. Purohit67, R. M. White67, J. R. Wilson67, P. R. Burchat68, A. J. Edwards68, T. S. Miyashita68, S. Ahmed69, M. S. Alam69, J. A. Ernst69, B. Pan69, M. A. Saeed69, S. B. Zain69, S. M. Spanier70, B. J. Wogsland70, R. Eckmann71, J. L. Ritchie71, A. M. Ruland71, C. J. Schilling71, R. F. Schwitters71, B. C. Wray71, B. W. Drummond72, J. M. Izen72, X. C. Lou72, F. Bianchi73a,73b, D. Gamba73a,73b, M. Pelliccioni73a,73b, M. Bomben74a,74b, L. Bosisio74a,74b, C. Cartaro74a,74b, G. Della Ricca74a,74b, L. Lanceri74a,74b, L. Vitale74a,74b, V. Azzolini75, N. Lopez-March75, F. Martinez-Vidal75, D. A. Milanes75, A. Oyanguren75, J. Albert76, Sw. Banerjee76, B. Bhuyan76, H. H. F. Choi76, K. Hamano76, G. J. King76, R. Kowalewski76, M. J. Lewczuk76, I. M. Nugent76, J. M. Roney76, R. J. Sobie76, T. J. Gershon77, P. F. Harrison77, J. Ilic77, T. E. Latham77, G. B. Mohanty77, E. M. T. Puccio77, H. R. Band78, X. Chen78, S. Dasu78, K. T. Flood78, Y. Pan78, R. Prepost78, C. O. Vuosalo78, and S. L. Wu78 (BABAR Collaboration)
1Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France
2Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain
3aINFN Sezione di Bari, I-70126 Bari, Italy;
3bDipartimento di Fisica, Università di Bari, I-70126 Bari, Italy
4University of Bergen, Institute of Physics, N-5007 Bergen, Norway
5Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
6University of Birmingham, Birmingham, B15 2TT, United Kingdom
7Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany
8University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
9Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
10Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
11University of California at Irvine, Irvine, California 92697, USA
12University of California at Los Angeles, Los Angeles, California 90024, USA
13University of California at Riverside, Riverside, California 92521, USA
14University of California at San Diego, La Jolla, California 92093, USA
15University of California at Santa Barbara, Santa Barbara, California 93106, USA
16University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA
17California Institute of Technology, Pasadena, California 91125, USA
18University of Cincinnati, Cincinnati, Ohio 45221, USA
19University of Colorado, Boulder, Colorado 80309, USA
20Colorado State University, Fort Collins, Colorado 80523, USA
21Technische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, Germany
22Technische Universität Dresden, Institut für Kern- und Teilchenphysik, D-01062 Dresden, Germany
23Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, F-91128 Palaiseau, France
24University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
25aINFN Sezione di Ferrara, I-44100 Ferrara, Italy;
25bDipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, Italy
26INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
27aINFN Sezione di Genova, I-16146 Genova, Italy;
27bDipartimento di Fisica, Università di Genova, I-16146 Genova, Italy
28Harvard University, Cambridge, Massachusetts 02138, USA
29Universität Heidelberg, Physikalisches Institut, Philosophenweg 12, D-69120 Heidelberg, Germany
30Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, D-12489 Berlin, Germany
31Imperial College London, London, SW7 2AZ, United Kingdom
32University of Iowa, Iowa City, Iowa 52242, USA
33Iowa State University, Ames, Iowa 50011-3160, USA
34Johns Hopkins University, Baltimore, Maryland 21218, USA
35Laboratoire de l’Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d’Orsay, B.P. 34, F-91898 Orsay Cedex, France
36Lawrence Livermore National Laboratory, Livermore, California 94550, USA
37University of Liverpool, Liverpool L69 7ZE, United Kingdom
38Queen Mary, University of London, London, E1 4NS, United Kingdom
39University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom
40University of Louisville, Louisville, Kentucky 40292, USA
41Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany
42University of Manchester, Manchester M13 9PL, United Kingdom
43University of Maryland, College Park, Maryland 20742, USA
44University of Massachusetts, Amherst, Massachusetts 01003, USA
45Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA
46McGill University, Montréal, Québec, Canada H3A 2T8
47aINFN Sezione di Milano, I-20133 Milano, Italy;
47bDipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
48University of Mississippi, University, Mississippi 38677, USA
49Université de Montréal, Physique des Particules, Montréal, Québec, Canada H3C 3J7
50Mount Holyoke College, South Hadley, Massachusetts 01075, USA
51aINFN Sezione di Napoli, I-80126 Napoli, Italy;
51bDipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli, Italy
52NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, The Netherlands
53University of Notre Dame, Notre Dame, Indiana 46556, USA
54Ohio State University, Columbus, Ohio 43210, USA
55University of Oregon, Eugene, Oregon 97403, USA
56aINFN Sezione di Padova, I-35131 Padova, Italy;
56bDipartimento di Fisica, Università di Padova, I-35131 Padova, Italy
57Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France
58University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
59aINFN Sezione di Perugia, I-06100 Perugia, Italy;
59bDipartimento di Fisica, Università di Perugia, I-06100 Perugia, Italy
60aINFN Sezione di Pisa, I-56127 Pisa, Italy;
60bDipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy;
60cScuola Normale Superiore di Pisa, I-56127 Pisa, Italy
61Princeton University, Princeton, New Jersey 08544, USA
62aINFN Sezione di Roma, I-00185 Roma, Italy;
62bDipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy
63Universität Rostock, D-18051 Rostock, Germany
64Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
65CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France
66SLAC National Accelerator Laboratory, Stanford, California 94309 USA
67University of South Carolina, Columbia, South Carolina 29208, USA
68Stanford University, Stanford, California 94305-4060, USA
69State University of New York, Albany, New York 12222, USA
70University of Tennessee, Knoxville, Tennessee 37996, USA
71University of Texas at Austin, Austin, Texas 78712, USA
72University of Texas at Dallas, Richardson, Texas 75083, USA
73aINFN Sezione di Torino, I-10125 Torino, Italy;
73bDipartimento di Fisica Sperimentale, Università di Torino, I-10125 Torino, Italy
74aINFN Sezione di Trieste, I-34127 Trieste, Italy;
74bDipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy
75IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain
76University of Victoria, Victoria, British Columbia, Canada V8W 3P6
77Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
78University of Wisconsin, Madison, Wisconsin 53706, USA
Received 8 April 2009; published 28 May 2009
We have performed a search for the rare leptonic decays B+→ℓ+νℓ(l=e,μ), using data collected at the Υ(4S) resonance by the BABAR detector at the PEP-II storage ring. In a sample of 468×106 BB̅ pairs we find no evidence for a signal and set an upper limit on the branching fractions B(B+→μ+νμ)<1.0×10-6 and B(B+→e+νe)<1.9×10-6 at the 90% confidence level, using a Bayesian approach.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.79.091101
DOI:
10.1103/PhysRevD.79.091101
*Deceased. †Now at Temple University, Philadelphia, PA 19122, USA. ‡Now at Tel Aviv University, Tel Aviv, 69978, Israel. §Also with Università di Perugia, Dipartimento di Fisica, Perugia, Italy. **Also with Università di Roma La Sapienza, I-00185 Roma, Italy. ††Now at University of South Alabama, Mobile, AL 36688, USA. ‡‡Also with Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France. aAlso with Università di Sassari, Sassari, Italy.
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