Observation of the semileptonic decays B→D*τ-(ν)over-barτ and evidence for B→Dτ-(ν)over-barτ

被引：62

作者：

Aubert, B. ^{[1
]}

Bona, M. ^{[1
]}

Boutigny, D. ^{[1
]}

Karyotakis, Y. ^{[1
]}

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

Poireau, V.

Prudent, X. ^{[1
]}

Tisserand, V. ^{[1
]}

Zghiche, A. ^{[1
]}

Tico, J. Garra ^{[2
]}

Grauges, E. ^{[2
]}

Lopez, L. ^{[3
]}

Palano, A. ^{[3
]}

Pappagallo, M. ^{[3
]}

Eigen, G. ^{[4
]}

Stugu, B. ^{[4
]}

Sun, L. ^{[4
]}

Abrams, G. S. ^{[5
]}

Battaglia, M. ^{[5
]}

Brown, D. N. ^{[5
,41
]}

Button-Shafer, J. ^{[5
]}

Cahn, R. N. ^{[5
]}

Groysman, Y. ^{[5
]}

Jacobsen, R. G. ^{[5
]}

Kadyk, J. A. ^{[5
]}

Kerth, L. T. ^{[5
]}

Kolomensky, Yu. G. ^{[5
]}

Kukartsev, G. ^{[5
]}

Pegna, D. Lopes ^{[5
]}

Lynch, G. ^{[5
]}

Mir, L. M. ^{[5
]}

Orimoto, T. J. ^{[5
]}

Osipenkov, I. L. ^{[5
]}

Ronan, M. T. ^{[5
]}

Tackmann, K. ^{[5
]}

Tanabe, T. ^{[5
]}

Wenzel, W. A. ^{[5
]}

Sanchez, P. del Amo ^{[6
]}

Hawkes, C. M. ^{[6
]}

Watson, A. T. ^{[6
]}

Koch, H. ^{[7
]}

Schroeder, T. ^{[7
]}

Walker, D. ^{[8
]}

Asgeirsson, D. J. ^{[9
]}

Cuhadar-Donszelmann, T. ^{[9
]}

Fulsom, B. G. ^{[9
]}

Hearty, C. ^{[9
]}

Mattison, T. S. ^{[9
]}

McKenna, J. A. ^{[9
]}

Barrett, M. ^{[10
]}

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, E-08028 Barcelona, Spain

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

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

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

[7] Univ Calif Berkeley, Lawrence Berkeley Lab, 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 Riverside, Riverside, CA 92521 USA

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

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

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

[20] CALTECH, Pasadena, CA 91125 USA

[21] Univ Cincinnati, Cincinnati, OH 45221 USA

[22] Univ Colorado, Boulder, CO 80309 USA

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

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

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

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

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

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

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

[30] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, 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] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

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

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

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

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

[39] CNRS, IN2P3, Lab Accelerateur Lineaire, 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] Univ Manchester, Manchester M13 9PL, Lancs, England

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

[48] Univ Massachusetts, Amherst, MA 01003 USA

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

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100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.100.021801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of the semileptonic decays B--> D-0 tau(-)(nu) over bar (tau), B--> D-*0 tau(-)(nu) over bar (tau), (B) over bar (0)-> D+tau(-)(nu) over bar (tau), and (B) over bar (0)-> D*+tau(-)(nu) over bar (tau), which are potentially sensitive to non-standard model amplitudes. The data sample comprises 232x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector. From a combined fit to B- and (B) over bar (0) channels, we obtain the branching fractions B(B -> D tau(-)(nu) over bar (tau))=(0.86 +/- 0.24 +/- 0.11 +/- 0.06)% and B(B -> D-*tau(-)(nu) over bar (tau))=(1.62 +/- 0.31 +/- 0.10 +/- 0.05)% (normalized for the (B) over bar (0)), where the uncertainties are statistical, systematic, and normalization-mode-related.

引用

页数：7

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