Measurement of the B± → ρ± π0 branching fraction and direct CP asymmetry

被引：15

作者：

Aubert, B. ^{[1
]}

Bona, M.

Boutigny, D.

Couderc, F.

Karyotakis, Y.

Lees, J. P.

Poireau, V.

Tisserand, V.

Zghiche, A.

Grauges, E.

Palano, A.

Chen, J. C.

Qi, N. D.

Rong, G.

Wang, P.

Zhu, Y. S.

Eigen, G.

Ofte, I.

Stugu, B.

Abrams, G. S.

Battaglia, M.

Brown, D. N.

Button-Shafer, J.

Cahn, R. N.

Charles, E.

Gill, M. S.

Groysman, Y.

Jacobsen, R. G.

Kadyk, J. A.

Kerth, L. T.

Kolomensky, Yu. G.

Kukartsev, G.

Lynch, G.

Mir, L. M.

Orimoto, T. J.

Pripstein, M.

Roe, N. A.

Ronan, M. T.

Wenzel, W. A.

Sanchez, P. del Amo

Barrett, M.

Ford, K. E.

Harrison, T. J.

Hart, A. J.

Hawkes, C. M.

Watson, A. T.

Held, T.

Koch, H.

Lewandowski, B.

Pelizaeus, M.

机构：

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

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

[3] Univ Bari, Dipartimento Fis, I-70126 Bari, Italy

[4] INFN, I-70126 Bari, Italy

[5] Inst High Energy Phys, Beijing 100030, Peoples R China

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

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

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

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

[10] Univ Birmingham, D-44780 Bochum, Germany

[11] Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany

[12] Univ Bristol, Bristol BS8 1TH, Avon, England

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

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

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

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

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

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

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

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

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

[22] CALTECH, Pasadena, CA 91125 USA

[23] Univ Cincinnati, Cincinnati, OH 45221 USA

[24] Univ Colorado, Boulder, CO 80309 USA

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

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

[27] Tech Univ Dresden, D-01062 Dresden, Germany

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

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

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

[31] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuer, F-91128 Palaiseau, France

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

[33] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[34] INFN, I-44100 Ferrara, Italy

[35] Tech Univ Dresden, Inst Kern, D-01062 Dresden, Germany

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

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

[38] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[39] Ist Nazl Fis Nucl, I-44100 Ferrara, Italy

[40] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

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

[42] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[43] Harvard Univ, Cambridge, MA 02138 USA

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

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

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

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

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

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

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

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 09期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevD.75.091103

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present improved measurements of the branching fraction and CP asymmetry for the process B-+/-->rho(+/-)pi(0). The data sample corresponding to 211 fb(-1) comprises 232x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The yield and CP asymmetry are measured using an extended maximum likelihood fitting method. The branching fraction and CP asymmetry are found to be B(B-+/-->rho(+/-)pi(0))=[10.2 +/- 1.4(stat)+/- 0.9(syst)]x10(-6) and A(CP)(B-+/-->rho(+/-)pi(0))=-0.01 +/- 0.13(stat)+/- 0.02(syst).

引用

页数：8

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