Observation of CP violation in B0→K+π- and B0→π+π-

被引：57

作者：

Aubert, B. ^{[1
]}

Bona, M.

Boutigny, D.

Karyotakis, Y.

Lees, J. P.

Poireau, V.

Prudent, X.

Tisserand, V.

Zghiche, A.

Tico, J. Garra

Grauges, E.

Lopez, L.

Palano, A.

Eigen, G.

Ofte, I.

Stugu, B.

Sun, L.

Abrams, G. S.

Battaglia, M.

Brown, D. N.

Button-Shafer, J.

Cahn, R. N.

Groysman, Y.

Jacobsen, R. G.

Kadyk, J. A.

Kerth, L. T.

Kolomensky, Yu. G.

Kukartsev, G.

Pegna, D. Lopes

Lynch, G.

Mir, L. M.

Orimoto, T. J.

Pripstein, M.

Roe, N. A.

Ronan, M. T.

Tackmann, K.

Wenzel, W. A.

del Amo Sanchez, P.

Hawkes, C. M.

Watson, A. T.

Held, T.

Koch, H.

Lewandowski, B.

Pelizaeus, M.

Schroeder, T.

Steinke, M.

Cottingham, W. N.

Walker, D.

Asgeirsson, D. J.

Cuhadar-Donszelmann, T.

机构：

[1] CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France

[2] Univ Savoie, F-74941 Annecy Le Vieux, France

[3] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain

[4] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy

[5] Univ Bari, INFN, I-70126 Bari, Italy

[6] Univ Bergen, Inst Phys, N-5007 Bergen, Norway

[7] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[8] Univ Calif Berkeley, Berkeley, CA 94720 USA

[9] Univ Birmingham, Birmingham B15 2TT, W Midlands, England

[10] Ruhr Univ Bochum, Inst Experimentalphys, D-44780 Bochum, Germany

[11] Univ Bristol, Bristol BS8 1TL, Avon, England

[12] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada

[13] Brunel Univ, Uxbridge UB8 3PH, Middx, England

[14] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[15] Univ Calif Irvine, Irvine, CA 92697 USA

[16] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[17] Univ Calif Riverside, Riverside, CA 92521 USA

[18] Univ Calif San Diego, La Jolla, CA 92093 USA

[19] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[20] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[21] CALTECH, Pasadena, CA 91125 USA

[22] Univ Cincinnati, Cincinnati, OH 45221 USA

[23] Univ Colorado, Boulder, CO 80309 USA

[24] Colorado State Univ, Ft Collins, CO 80523 USA

[25] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

[26] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[27] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France

[28] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[29] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy

[30] Univ Ferrara, INFN, I-44100 Ferrara, Italy

[31] Lab Nacl Frascati INFN, I-00044 Frascati, Italy

[32] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[33] Univ Genoa, INFN, I-16146 Genoa, Italy

[34] Harvard Univ, Cambridge, MA 02138 USA

[35] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[36] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

[37] Univ Iowa, Iowa City, IA 52242 USA

[38] Iowa State Univ, Ames, IA 50011 USA

[39] Johns Hopkins Univ, Baltimore, MD 21218 USA

[40] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany

[41] CNRS, IN2P3, Accelerateur Lineaire Lab, F-91898 Orsay, France

[42] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France

[43] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[44] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[45] Univ London, London E1 4NS, England

[46] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England

[47] Univ Louisville, Louisville, KY 40292 USA

[48] Univ Manchester, Manchester M13 9PL, Lancs, England

[49] Univ Maryland, College Pk, MD 20742 USA

[50] Univ Massachusetts, Amherst, MA 01003 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.021603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report observations of CP violation in the decays B-0 -> K+pi(-) and B-0 ->pi(+)pi(-) in a sample of 383 x 10(6) Upsilon(4S)-> B (B) over bar events. We find 4372 +/- 82 B-0 -> K+pi(-) decays and measure the direct CP-violating charge asymmetry A(K pi)=-0.107 +/- 0.018(stat)(-0.004)(+0.007)(syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139 +/- 49 B-0 ->pi(+)pi(-) decays and measure the CP-violating asymmetries S-pi pi=-0.60+/-0.11(stat) +/- 0.03(syst) and C-pi pi=-0.21 +/- 0.09(stat) +/- 0.02(syst). CP conservation in B-0 ->pi(+)pi(-) (S-pi pi=C-pi pi=0) is excluded at a confidence level 1-C.L.=8 x 10(-8), corresponding to 5.4 standard deviations.

引用

页数：7

共 29 条

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