Study of CP-violating asymmetries in B0→π+ π-, K+ π- decays -: art. no. 051502

被引:14
作者
Aubert, B [1 ]
Boutigny, D
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Robbe, P
Tisserand, V
Palano, A
Pompili, A
Chen, GP
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Clark, AR
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kral, JF
LeClerc, C
Levi, ME
Lynch, G
Oddone, PJ
Perazzo, A
Pripstein, M
Roe, NA
Romosan, A
Ronan, MT
Shelkov, VG
Telnov, AV
Wenzel, WA
Bright-Thomas, PG
Harrison, TJ
Hawkes, CM
Knowles, DJ
机构
[1] Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France
[2] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy
[3] Ist Nazl Fis Nucl, I-70126 Bari, Italy
[4] Inst High Energy Phys, Beijing 100039, Peoples R China
[5] Univ Bergen, Inst Phys, N-5007 Bergen, Norway
[6] Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[7] Univ Calif Berkeley, Berkeley, CA 94720 USA
[8] Univ Birmingham, Birmingham B15 2TT, W Midlands, England
[9] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany
[10] Univ Bristol, Bristol BS8 1TL, Avon, England
[11] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada
[12] Brunel Univ, Uxbridge UB8 3PH, Middx, England
[13] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[14] Univ Calif Irvine, Irvine, CA 92697 USA
[15] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[16] Univ Calif San Diego, La Jolla, CA 92093 USA
[17] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA
[18] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
[19] CALTECH, Pasadena, CA 91125 USA
[20] Univ Cincinnati, Cincinnati, OH 45221 USA
[21] Univ Colorado, Boulder, CO 80309 USA
[22] Colorado State Univ, Ft Collins, CO 80523 USA
[23] CEA Saclay, DAPNIA, F-91191 Gif Sur Yvette, France
[24] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany
[25] Ecole Polytech, F-91128 Palaiseau, France
[26] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland
[27] Elon Univ, Elon, NC 27244 USA
[28] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy
[29] Ist Nazl Fis Nucl, I-44100 Ferrara, Italy
[30] Florida A&M Univ, Tallahassee, FL 32307 USA
[31] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[32] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy
[33] Ist Nazl Fis Nucl, I-16146 Genoa, Italy
[34] Harvard Univ, Cambridge, MA 02138 USA
[35] Univ Iowa, Iowa City, IA 52242 USA
[36] Iowa State Univ, Ames, IA 50011 USA
[37] Lab Accelerateur Lineaire, F-91898 Orsay, France
[38] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[39] Univ Liverpool, Liverpool L69 3BX, Merseyside, England
[40] Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England
[41] Queen Mary Univ London, London E1 4NS, England
[42] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England
[43] Univ Louisville, Louisville, KY 40292 USA
[44] Univ Manchester, Manchester M13 9PL, Lancs, England
[45] Univ Maryland, College Pk, MD 20742 USA
[46] Univ Massachusetts, Amherst, MA 01003 USA
[47] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA
[48] McGill Univ, Montreal, PQ H3A 2T8, Canada
[49] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[50] Ist Nazl Fis Nucl, I-20133 Milan, Italy
关键词
D O I
10.1103/PhysRevD.65.051502
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the pi(+)pi(-) CP eigenstate, and an updated measurement of the charge asymmetry in B-0--> K+ pi(-) decays. In a sample of 33 million Y(4S) --> B (B) over bar decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65(-11)(+12) pi(+) pi(-) and 217+/-18 K+ pi(-) candidates and measure the asymmetry parameters S-pipi = 0.03(-0.56)(+0.53)+/-0.11, C-pipi = -0.25(-0.47)(+0.45)+/-0.14, and A(Kpi) = 0.07+/-0.08+/-0.02, where the first error is statistical and the second is systematic.
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页数:8
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