Measurement of the (B)over-bar->Dl(nu)over-bar partial width and form factor parameters

被引：25

作者：

Athanas, M

Avery, P

Jones, CD

Lohner, M

Prescott, C

Yelton, J

Zheng, J

Brandenburg, G

Briere, RA

Ershov, A

Gao, YS

Kim, DYJ

Wilson, R

Yamamoto, H

Browder, TE

Li, F

Li, Y

Rodriguez, JL

Bergfeld, T

Eisenstein, BI

Ernst, J

Gladding, GE

Gollin, GD

Hans, RM

Johnson, E

Karliner, I

Marsh, MA

Palmer, M

Selen, M

Thaler, JJ

Edwards, KW

Bellerive, A

Janicek, R

MacFarlane, DB

Patel, PM

Sadoff, AJ

Ammar, R

Baringer, P

Bean, A

Besson, D

Coppage, D

Darling, C

Davis, R

Hancock, N

Kotov, S

Kravchenko, I

Kwak, N

Anderson, S

Kubota, Y

Lee, SJ

机构：

[1] HARVARD UNIV,CAMBRIDGE,MA 02138

[2] UNIV HAWAII MANOA,HONOLULU,HI 96822

[3] UNIV ILLINOIS,CHAMPAIGN,IL 61801

[4] CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA

[5] INST PARTICLE PHYS,OTTAWA,ON,CANADA

[6] MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA

[7] INST PARTICLE PHYS,MONTREAL,PQ,CANADA

[8] ITHACA COLL,ITHACA,NY 14850

[9] UNIV KANSAS,LAWRENCE,KS 66045

[10] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[11] SUNY ALBANY,ALBANY,NY 12222

[12] OHIO STATE UNIV,COLUMBUS,OH 43210

[13] UNIV OKLAHOMA,NORMAN,OK 73019

[14] PURDUE UNIV,W LAFAYETTE,IN 47907

[15] UNIV ROCHESTER,ROCHESTER,NY 14627

[16] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309

[17] SO METHODIST UNIV,DALLAS,TX 75275

[18] SYRACUSE UNIV,SYRACUSE,NY 13244

[19] VANDERBILT UNIV,NASHVILLE,TN 37235

[20] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061

[21] WAYNE STATE UNIV,DETROIT,MI 48202

[22] CALTECH,PASADENA,CA 91125

[23] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

[24] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[25] UNIV COLORADO,BOULDER,CO 80309

[26] CORNELL UNIV,ITHACA,NY 14853

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.79.2208

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the decay (B) over bar --> Dl<(nu)over bar>, where I = e or mu. From a fit to the differential decay rate d Gamma/dw we measure the rate normalization F-D (1)\V-cb\ and form factor slope <(rho)over cap>(2)(D), and, using measured values of tau(B), find Gamma(B --> Dl<(nu)over bar>) = (12.0 +/- 0.9 +/- 2.1) ns(-1). The resulting branching fractions are B((B) over bar(0) --> D(+)l(-)<(nu)over bar>) = (1.87 +/- 0.15 +/- 0.32)% and B(B- --> D(0)l(-)<(nu)over bar>) = (1.94 +/- 0.15 +/- 0.34)%. The form factor parameters are in agreement with those measured in B --> D*l<(nu)over bar> decays, as predicted by heavy quark effective theory.

引用

页码：2208 / 2212

页数：5

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