Phys. Rev. Lett.
89,
281802
(2002)
[7 pages]
Measurements of Branching Fractions and CP-Violating Asymmetries in B0→π+π-, K+π-, K+K- Decays
B. Aubert et al. BABAR Collaboration
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B. Aubert1, D. Boutigny1, J.-M. Gaillard1, A. Hicheur1, Y. Karyotakis1, J. P. Lees1, P. Robbe1, V. Tisserand1, A. Zghiche1, A. Palano2, A. Pompili2, J. C. Chen3, N. D. Qi3, G. Rong3, P. Wang3, Y. S. Zhu3, G. Eigen4, I. Ofte4, B. Stugu4, G. S. Abrams5, A. W. Borgland5, A. B. Breon5, D. N. Brown5, J. Button-Shafer5, R. N. Cahn5, E. Charles5, M. S. Gill5, A. V. Gritsan5, Y. Groysman5, R. G. Jacobsen5, R. W. Kadel5, J. Kadyk5, L. T. Kerth5, Yu. G. Kolomensky5, J. F. Kral5, C. LeClerc5, M. E. Levi5, G. Lynch5, L. M. Mir5, P. J. Oddone5, T. J. Orimoto5, M. Pripstein5, N. A. Roe5, A. Romosan5, M. T. Ronan5, V. G. Shelkov5, A. V. Telnov5, W. A. Wenzel5, T. J. Harrison6, C. M. Hawkes6, D. J. Knowles6, S. W. O’Neale6, R. C. Penny6, A. T. Watson6, N. K. Watson6, T. Deppermann7, K. Goetzen7, H. Koch7, B. Lewandowski7, K. Peters7, H. Schmuecker7, M. Steinke7, N. R. Barlow8, W. Bhimji8, J. T. Boyd8, N. Chevalier8, P. J. Clark8, W. N. Cottingham8, C. Mackay8, F. F. Wilson8, K. Abe9, C. Hearty9, T. S. Mattison9, J. A. McKenna9, D. Thiessen9, S. Jolly10, A. K. McKemey10, V. E. Blinov11, A. D. Bukin11, A. R. Buzykaev11, V. B. Golubev11, V. N. Ivanchenko11, A. A. Korol11, E. A. Kravchenko11, A. P. Onuchin11, S. I. Serednyakov11, Yu. I. Skovpen11, A. N. Yushkov11, D. Best12, M. Chao12, D. Kirkby12, A. J. Lankford12, M. Mandelkern12, S. McMahon12, D. P. Stoker12, C. Buchanan13, S. Chun13, H. K. Hadavand14, E. J. Hill14, D. B. MacFarlane14, H. Paar14, S. Prell14, Sh. Rahatlou14, G. Raven14, U. Schwanke14, V. Sharma14, J. W. Berryhill15, C. Campagnari15, B. Dahmes15, P. A. Hart15, N. Kuznetsova15, S. L. Levy15, O. Long15, A. Lu15, M. A. Mazur15, J. D. Richman15, W. Verkerke15, J. Beringer16, A. M. Eisner16, M. Grothe16, C. A. Heusch16, W. S. Lockman16, T. Pulliam16, T. Schalk16, R. E. Schmitz16, B. A. Schumm16, A. Seiden16, M. Turri16, W. Walkowiak16, D. C. Williams16, M. G. Wilson16, E. Chen17, G. P. Dubois-Felsmann17, A. Dvoretskii17, D. G. Hitlin17, F. C. Porter17, A. Ryd17, A. Samuel17, S. Yang17, S. Jayatilleke18, G. Mancinelli18, B. T. Meadows18, M. D. Sokoloff18, T. Barillari19, P. Bloom19, W. T. Ford19, U. Nauenberg19, A. Olivas19, P. Rankin19, J. Roy19, J. G. Smith19, W. C. van Hoek19, L. Zhang19, J. L. Harton20, T. Hu20, M. Krishnamurthy20, A. Soffer20, W. H. Toki20, R. J. Wilson20, J. Zhang20, D. Altenburg21, T. Brandt21, J. Brose21, T. Colberg21, M. Dickopp21, R. S. Dubitzky21, A. Hauke21, E. Maly21, R. Müller-Pfefferkorn21, S. Otto21, K. R. Schubert21, R. Schwierz21, B. Spaan21, L. Wilden21, D. Bernard22, G. R. Bonneaud22, F. Brochard22, J. Cohen-Tanugi22, S. Ferrag22, S. T’Jampens22, Ch. Thiebaux22, G. Vasileiadis22, M. Verderi22, A. Anjomshoaa23, R. Bernet23, A. Khan23, D. Lavin23, F. Muheim23, S. Playfer23, J. E. Swain23, J. Tinslay23, M. Falbo24, C. Borean25, C. Bozzi25, L. Piemontese25, A. Sarti25, E. Treadwell26, F. Anulli27,*, R. Baldini-Ferroli27, A. Calcaterra27, R. de Sangro27, D. Falciai27, G. Finocchiaro27, P. Patteri27, I. M. Peruzzi27,*, M. Piccolo27, A. Zallo27, S. Bagnasco28, A. Buzzo28, R. Contri28, G. Crosetti28, M. Lo Vetere28, M. Macri28, M. R. Monge28, S. Passaggio28, F. C. Pastore28, C. Patrignani28, E. Robutti28, A. Santroni28, S. Tosi28, S. Bailey29, M. Morii29, R. Bartoldus30, G. J. Grenier30, U. Mallik30, J. Cochran31, H. B. Crawley31, J. Lamsa31, W. T. Meyer31, E. I. Rosenberg31, J. Yi31, M. Davier32, G. Grosdidier32, A. Höcker32, H. M. Lacker32, S. Laplace32, F. Le Diberder32, V. Lepeltier32, A. M. Lutz32, T. C. Petersen32, S. Plaszczynski32, M. H. Schune32, L. Tantot32, S. Trincaz-Duvoid32, G. Wormser32, R. M. Bionta33, V. Brigljević33, D. J. Lange33, K. van Bibber33, D. M. Wright33, A. J. Bevan34, J. R. Fry34, E. Gabathuler34, R. Gamet34, M. George34, M. Kay34, D. J. Payne34, R. J. Sloane34, C. Touramanis34, M. L. Aspinwall35, D. A. Bowerman35, P. D. Dauncey35, U. Egede35, I. Eschrich35, G. W. Morton35, J. A. Nash35, P. Sanders35, D. Smith35, G. P. Taylor35, J. J. Back36, G. Bellodi36, P. Dixon36, P. F. Harrison36, R. J. L. Potter36, H. W. Shorthouse36, P. Strother36, P. B. Vidal36, G. Cowan37, H. U. Flaecher37, S. George37, M. G. Green37, A. Kurup37, C. E. Marker37, T. R. McMahon37, S. Ricciardi37, F. Salvatore37, G. Vaitsas37, M. A. Winter37, D. Brown38, C. L. Davis38, J. Allison39, R. J. Barlow39, A. C. Forti39, F. Jackson39, G. D. Lafferty39, A. J. Lyon39, N. Savvas39, J. H. Weatherall39, J. C. Williams39, A. Farbin40, A. Jawahery40, V. Lillard40, D. A. Roberts40, J. R. Schieck40, G. Blaylock41, C. Dallapiccola41, K. T. Flood41, S. S. Hertzbach41, R. Kofler41, V. B. Koptchev41, T. B. Moore41, H. Staengle41, S. Willocq41, B. Brau42, R. Cowan42, G. Sciolla42, F. Taylor42, R. K. Yamamoto42, M. Milek43, P. M. Patel43, F. Palombo44, J. M. Bauer45, L. Cremaldi45, V. Eschenburg45, R. Kroeger45, J. Reidy45, D. A. Sanders45, D. J. Summers45, C. Hast46, P. Taras46, H. Nicholson47, C. Cartaro48, N. Cavallo48, G. De Nardo48, F. Fabozzi48, C. Gatto48, L. Lista48, P. Paolucci48, D. Piccolo48, C. Sciacca48, J. M. LoSecco49, J. R. G. Alsmiller50, T. A. Gabriel50, J. Brau51, R. Frey51, M. Iwasaki51, C. T. Potter51, N. B. Sinev51, D. Strom51, E. Torrence51, F. Colecchia52, A. Dorigo52, F. Galeazzi52, M. Margoni52, M. Morandin52, M. Posocco52, M. Rotondo52, F. Simonetto52, R. Stroili52, C. Voci52, M. Benayoun53, H. Briand53, J. Chauveau53, P. David53, Ch. de la Vaissière53, L. Del Buono53, O. Hamon53, Ph. Leruste53, J. Ocariz53, M. Pivk53, L. Roos53, J. Stark53, P. F. Manfredi54, V. Re54, V. Speziali54, L. Gladney55, Q. H. Guo55, J. Panetta55, C. Angelini56, G. Batignani56, S. Bettarini56, M. Bondioli56, F. Bucci56, G. Calderini56, E. Campagna56, M. Carpinelli56, F. Forti56, M. A. Giorgi56, A. Lusiani56, G. Marchiori56, F. Martinez-Vidal56, M. Morganti56, N. Neri56, E. Paoloni56, M. Rama56, G. Rizzo56, F. Sandrelli56, G. Triggiani56, J. Walsh56, M. Haire57, D. Judd47, K. Paick57, L. Turnbull57, D. E. Wagoner57, J. Albert58, N. Danielson58, P. Elmer58, C. Lu58, V. Miftakov58, J. Olsen58, S. F. Schaffner58, A. J. S. Smith58, A. Tumanov58, E. W. Varnes58, F. Bellini59, G. Cavoto58,59, D. del Re59, R. Faccini14,59, F. Ferrarotto59, F. Ferroni59, E. Leonardi59, M. A. Mazzoni59, S. Morganti59, G. Piredda59, F. Safai Tehrani59, M. Serra59, C. Voena59, S. Christ60, G. Wagner60, R. Waldi60, T. Adye61, N. De Groot61, B. Franek61, N. I. Geddes61, G. P. Gopal61, S. M. Xella61, R. Aleksan62, S. Emery62, A. Gaidot62, P.-F. Giraud62, G. Hamel de Monchenault62, W. Kozanecki62, M. Langer62, G. W. London62, B. Mayer62, G. Schott62, B. Serfass62, G. Vasseur62, Ch. Yeche62, M. Zito62, M. V. Purohit63, A. W. Weidemann63, F. X. Yumiceva63, I. Adam64, D. Aston64, N. Berger64, A. M. Boyarski64, M. R. Convery64, D. P. Coupal64, D. Dong64, J. Dorfan64, W. Dunwoodie64, R. C. Field64, T. Glanzman64, S. J. Gowdy64, E. Grauges64, T. Haas64, T. Hadig64, V. Halyo64, T. Himel64, T. Hryn’ova64, M. E. Huffer64, W. R. Innes64, C. P. Jessop64, M. H. Kelsey64, P. Kim64, M. L. Kocian64, U. Langenegger64, D. W. G. S. Leith64, S. Luitz64, V. Luth64, H. L. Lynch64, H. Marsiske64, S. Menke64, R. Messner64, D. R. Muller64, C. P. O’Grady64, V. E. Ozcan64, A. Perazzo64, M. Perl64, S. Petrak64, H. Quinn64, B. N. Ratcliff64, S. H. Robertson64, A. Roodman64, A. A. Salnikov64, T. Schietinger64, R. H. Schindler64, J. Schwiening64, G. Simi64, A. Snyder64, A. Soha64, S. M. Spanier64, J. Stelzer64, D. Su64, M. K. Sullivan64, H. A. Tanaka64, J. Va’vra64, S. R. Wagner64, M. Weaver64, A. J. R. Weinstein64, W. J. Wisniewski64, D. H. Wright64, C. C. Young64, P. R. Burchat65, C. H. Cheng65, T. I. Meyer65, C. Roat65, R. Henderson66, W. Bugg67, H. Cohn67, J. M. Izen68, I. Kitayama68, X. C. Lou68, F. Bianchi69, M. Bona69, D. Gamba69, L. Bosisio70, G. Della Ricca70, S. Dittongo70, L. Lanceri70, P. Poropat70, L. Vitale70, G. Vuagnin70, R. S. Panvini71, S. W. Banerjee72, C. M. Brown72, D. Fortin72, P. D. Jackson72, R. Kowalewski72, J. M. Roney72, H. R. Band73, S. Dasu73, M. Datta73, A. M. Eichenbaum73, H. Hu73, J. R. Johnson73, R. Liu73, F. Di Lodovico73, A. Mohapatra73, Y. Pan73, R. Prepost73, I. J. Scott73, S. J. Sekula73, J. H. von Wimmersperg-Toeller73, J. Wu73, S. L. Wu73, Z. Yu73, and H. Neal74 (BABAR Collaboration)
1Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France
2Università di Bari, Dipartimento di Fisica and INFN, I-70126 Bari, Italy
3Institute of High Energy Physics, Beijing 100039, China
4University of Bergen, Institute of Physics, N-5007 Bergen, Norway
5Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720
6University of Birmingham, Birmingham B15 2TT, United Kingdom
7Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany
8University of Bristol, Bristol BS8 1TL, United Kingdom
9University of British Columbia, Vancouver, BC, Canada V6T 1Z1
10Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
11Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
12University of California at Irvine, Irvine, California 92697
13University of California at Los Angeles, Los Angeles, California 90024
14University of California at San Diego, La Jolla, California 92093
15University of California at Santa Barbara, Santa Barbara, California 93106
16University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064
17California Institute of Technology, Pasadena, California 91125
18University of Cincinnati, Cincinnati, Ohio 45221
19University of Colorado, Boulder, Colorado 80309
20Colorado State University, Fort Collins, Colorado 80523
21Technische Universität Dresden, Institut für Kern-und Teilchenphysik, D-01062 Dresden, Germany
22Ecole Polytechnique, LLR, F-91128 Palaiseau, France
23University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
24Elon University, Elon University, North Carolina 27244-2010
25Università di Ferrara, Dipartimento di Fisica and INFN, I-44100 Ferrara, Italy
26Florida A&M University, Tallahassee, Florida 32307
27Laboratori Nazionali di Frascati dell’INFN, I-00044 Frascati, Italy
28Università di Genova, Dipartimento di Fisica and INFN, I-16146 Genova, Italy
29Harvard University, Cambridge, Massachusetts 02138
30University of Iowa, Iowa City, Iowa 52242
31Iowa State University, Ames, Iowa 50011-3160
32Laboratoire de l’Accélérateur Linéaire, F-91898 Orsay, France
33Lawrence Livermore National Laboratory, Livermore, California 94550
34University of Liverpool, Liverpool L69 3BX, United Kingdom
35University of London, Imperial College, London SW7 2BW, United Kingdom
36Queen Mary, University of London, London E1 4NS, United Kingdom
37University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom
38University of Louisville, Louisville, Kentucky 40292
39University of Manchester, Manchester M13 9PL, United Kingdom
40University of Maryland, College Park, Maryland 20742
41University of Massachusetts, Amherst, Massachusetts 01003
42Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139
43McGill University, Montréal, QC, Canada H3A 2T8
44Università di Milano, Dipartimento di Fisica and INFN, I-20133 Milano, Italy
45University of Mississippi, University, Mississippi 38677
46Université de Montréal, Laboratoire René J. A. Lévesque, Montréal, QC, Canada H3C 3J7
47Mount Holyoke College, South Hadley, Massachusetts 01075
48Università di Napoli Federico II, Dipartimento di Scienze Fisiche and INFN, I-80126, Napoli, Italy
49University of Notre Dame, Notre Dame, Indiana 46556
50Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
51University of Oregon, Eugene, Oregon 97403
52Università di Padova, Dipartimento di Fisica and INFN, I-35131 Padova, Italy
53Universités Paris VI et VII, Lab de Physique Nucléaire H. E., F-75252 Paris, France
54Università di Pavia, Dipartimento di Elettronica and INFN, I-27100 Pavia, Italy
55University of Pennsylvania, Philadelphia, Pennsylvania 19104
56Università di Pisa, Scuola Normale Superiore and INFN, I-56010 Pisa, Italy
57Prairie View A&M University, Prairie View, Texas 77446
58Princeton University, Princeton, New Jersey 08544
59Università di Roma La Sapienza, Dipartimento di Fisica and INFN, I-00185 Roma, Italy
60Universität Rostock, D-18051 Rostock, Germany
61Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
62DAPNIA, Commissariat à l’Energie Atomique/Saclay, F-91191 Gif-sur-Yvette, France
63University of South Carolina, Columbia, South Carolina 29208
64Stanford Linear Accelerator Center, Stanford, California 94309
65Stanford University, Stanford, California 94305-4060
66TRIUMF, Vancouver, BC, Canada V6T 2A3
67University of Tennessee, Knoxville, Tennessee 37996
68University of Texas at Dallas, Richardson, Texas 75083
69Università di Torino, Dipartimento di Fisica Sperimentale and INFN, I-10125 Torino, Italy
70Università di Trieste, Dipartimento di Fisica and INFN, I-34127 Trieste, Italy
71Vanderbilt University, Nashville, Tennessee 37235
72University of Victoria, Victoria, BC, Canada V8W 3P6
73University of Wisconsin, Madison, Wisconsin 53706
74Yale University, New Haven, Connecticut 06511
Received 23 July 2002; published 31 December 2002
We present measurements of branching fractions and CP-violating asymmetries for two-body neutral B̅ meson decays to charged pions and kaons based on a sample of about 88×106 ϒ(4S)→BB̅ decays. From a time-independent fit we measure the charge-averaged branching fractions B(B0→π+π-)=(4.7±0.6±0.2)×10-6, B(B0→K+π-)=(17.9±0.9±0.7)×10-6, and the direct CP-violating charge asymmetry AKπ=-0.102±0.050±0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B0→π+π- CP-violating parameters Sππ=0.02±0.34±0.05 [-0.54,+0.58] and Cππ=-0.30±0.25±0.04 [-0.72,+0.12].
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.281802
DOI:
10.1103/PhysRevLett.89.281802
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh
*Also with Università di Perugia, I-06100 Perugia, Italy.
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