Measurements of branching fractions for B+ → ρ+γ, B0 → ρ0γ, and B0 → ωγ

被引：17

作者：

Aubert, B. ^{[1
,87
]}

Bona, M. ^{[1
,87
]}

Karyotakis, Y. ^{[1
,87
]}

Lees, J. P. ^{[1
,87
]}

Poireau, V. ^{[1
,87
]}

Prencipe, E. ^{[1
,87
]}

Prudent, X. ^{[1
,87
]}

Tisserand, V. ^{[1
,87
]}

Tico, J. Garra ^{[2
]}

Grauges, E. ^{[2
]}

Lopez, L. ^{[3
,4
]}

Palano, A. ^{[3
,4
]}

Pappagallo, M. ^{[3
,4
]}

Eigen, G. ^{[5
]}

Stugu, B. ^{[5
]}

Sun, L. ^{[5
]}

Abrams, G. S. ^{[6
,88
]}

Battaglia, M. ^{[6
,88
]}

Brown, D. N. ^{[6
,41
,88
]}

Cahn, R. N. ^{[6
,88
]}

Jacobsen, R. G. ^{[6
,88
]}

Kerth, L. T. ^{[6
,88
]}

Kolomensky, Yu. G. ^{[6
,88
]}

Lynch, G. ^{[6
,88
]}

Osipenkov, I. L. ^{[6
,88
]}

Ronan, M. T. ^{[6
,88
]}

Tackmann, K. ^{[6
,88
]}

Tanabe, T. ^{[6
,88
]}

Hawkes, C. M. ^{[89
]}

Soni, N. ^{[89
]}

Watson, A. T. ^{[89
]}

Koch, H. ^{[7
]}

Schroeder, T. ^{[7
]}

Walker, D. ^{[90
]}

Asgeirsson, D. J. ^{[8
]}

Fulsom, B. G. ^{[8
]}

Hearty, C. ^{[8
]}

Mattison, T. S. ^{[8
]}

McKenna, J. A. ^{[8
]}

Barrett, M. ^{[9
]}

Khan, A. ^{[9
]}

Blinov, V. E. ^{[10
]}

Bukin, A. D. ^{[10
]}

Buzykaev, A. R. ^{[10
]}

Druzhinin, V. P. ^{[10
]}

Golubev, V. B. ^{[10
]}

Onuchin, A. P. ^{[10
]}

Serednyakov, S. I. ^{[10
]}

Skovpen, Yu. I. ^{[10
]}

Solodov, E. P. ^{[10
]}

机构：

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

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

[3] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

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

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

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

[7] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

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

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

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

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

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

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

[14] Univ Calif San Diego, San Diego, CA 92093 USA

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

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

[17] CALTECH, Pasadena, CA 91125 USA

[18] Univ Cincinnati, Cincinnati, OH 45221 USA

[19] Univ Colorado, Boulder, CO 80309 USA

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

[21] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

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

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

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

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

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

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

[28] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

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

[30] Harvard Univ, Cambridge, MA 02138 USA

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

[32] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

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

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

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

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

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

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

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

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

[41] Univ Louisville, Louisville, KY 40292 USA

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

[43] Univ Massachusetts, Amherst, MA 01003 USA

[44] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[45] McGill Univ, Montreal, PQ H3A 2T8, Canada

[46] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[47] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[48] Univ Mississippi, University, MS 38677 USA

[49] Univ Montreal, Montreal, PQ H3C 3J7, Canada

[50] Mt Holyoke Coll, S Hadley, MA 01075 USA

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 11期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevD.78.112001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present branching fraction measurements for the radiative decays B+-> rho(+)gamma, B-0 -> rho(0)gamma, and B-0 -> omega gamma. The analysis is based on a data sample of 465 X 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B+ -> rho(+)gamma) = (1.20(-0.37)(+0.42) +/- 0.20) X 10(-6), B(B-0 -> rho(0)gamma) = (0.97(-0.22)(+0.24) +/- 0.06) X 10(-6), and a 90% C.L. upper limit B(B-0 -> omega gamma) < 0.9 X 10(-6), where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Gamma(B+ -> rho(+)gamma)/2 Gamma(B-0 -> rho(0)gamma) - 1 = -0.43 (+0.25)(-0.22) +/- 0.10.

引用

页数：11

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