Measurements of the semileptonic decays (B)over-bar → Dl(ν)over-bar and (B)over-bar → D*l(ν)over-bar using a global fit to DXl(ν)over-bar final states

被引:65
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 ,41 ]
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. [86 ]
Soni, N. [86 ]
Watson, A. T. [86 ]
Koch, H. [7 ]
Schroeder, T. [7 ]
Walker, D. [87 ]
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 Livermore Natl Lab, Berkeley, CA 94704 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] CNRS, IN2P3, 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 | 2009年 / 79卷 / 01期
基金
英国科学技术设施理事会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
CB-VERTICAL-BAR; QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; B-MESON DECAYS; BRANCHING FRACTIONS; FORM-FACTORS; SYMMETRY; PHOTOS;
D O I
10.1103/PhysRevD.79.012002
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Semileptonic (B) over bar decays to DXl (nu) over bar (l = e or mu) are selected by reconstructing D(0)l and D(+)l combinations from a sample of 230 x 10(6) Y(4S) --> B (B) over bar decays recorded with the BABAR detector at the PEP-II e(+)e(-) collider at SLAC. A global fit to these samples in a three-dimensional space of kinematic variables is used to determine the branching fractions B(B- --> D(0)l (nu) over bar = (2.34 +/- 0.03 +/- 0.13)% and B(B- --> D*(0)l (nu) over bar) = (5.40 +/- 0.02 +/- 0.21)% where the errors are statistical and systematic, respectively. The fit also determines form-factor parameters in a parametrization based on heavy quark effective theory, resulting in rho(2)(D) = 1.20 +/- 0.04 +/- 0.07 for (B) over bar --> Dl (nu) over bar and rho(2)(D*) = 1.22 +/- 0.02 +/- 0.07 for (B) over bar --> D*(0)l (nu) over bar. These values are used to obtain the product of the Cabibbo-Kobayashi-Maskawa matrix element |V-cb| times the form factor at the zero recoil point for both (B) over bar --> Dl (nu) over bar decays, G(1)|V-cb| = (43.1 +/- 0.8 +/- 2.3) x 10(-3), and for (B) over bar --> D*l (nu) over bar decays, F(1)|V-cb| = (35.9) +/- 0.2 +/- 1.2) x 10(-3).
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