Measurement of the B → Dlν branching fractions and form factor

被引：51

作者：

Bartelt, J

Csorna, SE

McLean, KW

Marka, S

Xu, Z

Godang, R

Kinoshita, K

Lai, IC

Pomianowski, P

Schrenk, S

Bonvicini, G

Cinabro, D

Greene, R

Perera, LP

Zhou, GJ

Chan, S

Eigen, G

Lipeles, E

Miller, JS

Schmidtler, M

Shapiro, A

Sun, WM

Urheim, J

Weinstein, AJ

Würthwein, F

Jaffe, DE

Masek, G

Paar, HP

Potter, EM

Prell, S

Sharma, V

Asner, DM

Gronberg, J

Hill, TS

Lange, DJ

Morrison, RJ

Nelson, HN

Nelson, TK

Roberts, D

Behrens, BH

Ford, WT

Gritsan, A

Krieg, H

Roy, J

Smith, JG

Alexander, JP

Baker, R

Bebek, C

Berger, BE

Berkelman, K

机构：

[1] Vanderbilt Univ, Nashville, TN 37235 USA

[2] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[3] Wayne State Univ, Detroit, MI 48202 USA

[4] CALTECH, Pasadena, CA 91125 USA

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

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

[7] Univ Colorado, Boulder, CO 80309 USA

[8] Cornell Univ, Ithaca, NY 14853 USA

[9] Univ Florida, Gainesville, FL 32611 USA

[10] Harvard Univ, Cambridge, MA 02138 USA

[11] Univ Hawaii Manoa, Honolulu, HI 96822 USA

[12] Univ Illinois, Urbana, IL 61801 USA

[13] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[14] Inst Particle Phys, Montreal, PQ, Canada

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

[16] Ithaca Coll, Ithaca, NY 14850 USA

[17] Univ Kansas, Lawrence, KS 66045 USA

[18] Univ Minnesota, Minneapolis, MN 55455 USA

[19] SUNY Albany, Albany, NY 12222 USA

[20] Ohio State Univ, Columbus, OH 43210 USA

[21] Univ Oklahoma, Norman, OK 73019 USA

[22] Purdue Univ, W Lafayette, IN 47907 USA

[23] Univ Rochester, Rochester, NY 14627 USA

[24] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[25] So Methodist Univ, Dallas, TX 75275 USA

[26] Syracuse Univ, Syracuse, NY 13244 USA

[27] Univ Cincinnati, Cincinnati, OH 45221 USA

[28] Univ Texas, Austin, TX 78712 USA

[29] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.82.3746

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a sample of 3.3 x 10(6) B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied B- --> D(0)l(-)<(nu)over bar> and (B) over bar(0) --> D(+)l(-)<(nu)over bar> decays, where l(-) can be either e(-) or mu(-). We distinguish B --> Dl nu from other B semileptonic decays by examining the net momentum and energy of the particles recoiling against D - l pairs. We find Gamma(B --> Dl nu) = (14.1 +/- 1.0 +/- 1.2) ns(-1) and derive branching fractions for B- --> D(0)l(-)<(nu)over bar> and (B) over bar(0) --> D(+)l(-)<(nu)over bar> of (2.32 +/- 0.17 +/- 0.20)% and (2.20 +/- 0.16 +/- 0.19)%, respectively, where the uncertainties are statistical and systematic. We also investigate the B --> Dl nu form factor and the implication of the result for \V-cb\.

引用

页码：3746 / 3750

页数：5

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