Measurement of B→Xγ Decays and Determination of |Vtd/Vts|

被引：4

作者：

Aubert, B. ^{[1
]}

Bona, M. ^{[1
]}

Karyotakis, Y. ^{[1
]}

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

Poireau, V. ^{[1
]}

Prencipe, E. ^{[1
]}

Prudent, X. ^{[1
]}

Tisserand, V. ^{[1
]}

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
]}

Battaglia, M. ^{[6
]}

Brown, D. N. ^{[6
,45
]}

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

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

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

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

Lynch, G. ^{[6
]}

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

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

Tackmann, K. ^{[6
]}

Tanabe, T. ^{[6
]}

Hawkes, C. M. ^{[7
]}

Soni, N. ^{[7
]}

Watson, A. T. ^{[7
]}

Koch, H. ^{[8
]}

Schroeder, T. ^{[8
]}

Walker, D. ^{[9
]}

Asgeirsson, D. J. ^{[10
]}

Fulsom, B. G. ^{[10
]}

Hearty, C. ^{[10
]}

Mattison, T. S. ^{[10
]}

McKenna, J. A. ^{[10
]}

Barrett, M. ^{[11
]}

Khan, A. ^{[11
]}

Blinov, V. E. ^{[12
]}

Bukin, A. D. ^{[12
]}

Buzykaev, A. R. ^{[12
]}

Druzhinin, V. P. ^{[12
]}

Golubev, V. B. ^{[12
]}

Onuchin, A. P. ^{[12
]}

Serednyakov, S. I. ^{[12
]}

Skovpen, Yu. I. ^{[12
]}

Solodov, E. P. ^{[12
]}

机构：

[1] CNRS, Phys Particules Lab, IN2P3, 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] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

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

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

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

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

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

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

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

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

[15] Univ Calif Riverside, Riverside, CA 92521 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, 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] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

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

[25] Ecole Polytech, Lab Leprincce Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France

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

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

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

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

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

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

[32] Harvard Univ, Cambridge, MA 02138 USA

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

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

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

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

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

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

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

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

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

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

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

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

[45] Univ Louisville, Louisville, KY 40292 USA

[46] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

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

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

[49] Univ Massachusetts, Amherst, MA 01003 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

B-DECAYS; SUPERSYMMETRY; PHYSICS; MODEL;

D O I：

10.1103/PhysRevLett.102.161803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a sample of 383x10(6) BB events collected by the BABAR experiment, we measure sums of seven exclusive final states B -> X-d(s)gamma, where X-d(X-s) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8 GeV/c(2). After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b -> d gamma of (7.2 +/- 2.7(stat)+/- 2.3(syst))x10(-6). Taking the ratio of X-d to X-s we find Gamma(b -> d gamma)/Gamma(b -> s gamma)=0.033 +/- 0.013(stat)+/- 0.009(syst), from which we determine |V-td/V-ts|=0.177 +/- 0.043.

引用

页数：7

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