Hadronic mass moments in inclusive semileptonic B meson decays -: art. no. 251808

被引：75

作者：

Cronin-Hennessy, D

Lyon, AL

Roberts, S

Thorndike, EH

Coan, TE

Fadeyev, V

Gao, YS

Maravin, Y

Narsky, I

Stroynowski, R

Ye, J

Wlodek, T

Artuso, M

Benslama, K

Boulahouache, C

Bukin, K

Dambasuren, E

Majumder, G

Mountain, R

Skwarnicki, T

Stone, S

Wang, JC

Wolf, A

Kopp, SP

Kostin, M

Mahmood, AH

Csorna, SE

Danko, I

McLean, KW

Xu, Z

Godang, R

Bonvicini, G

Cinabro, D

Dubrovin, M

McGee, S

Zhou, GJ

Bornheim, A

Lipeles, E

Pappas, SP

Shapiro, A

Sun, WM

Weinstein, AJ

Jaffe, DE

Mahapatra, R

Masek, G

Paar, HP

Asner, DM

Eppich, A

Hilt, TS

Morrison, RJ

机构：

[1] Univ Rochester, Rochester, NY 14627 USA

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

[3] Syracuse Univ, Syracuse, NY 13244 USA

[4] Univ Texas, Austin, TX 78712 USA

[5] Univ Texas Pan Amer, Edinburg, TX 78539 USA

[6] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

[9] CALTECH, Pasadena, CA 91125 USA

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

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

[12] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[13] Cornell Univ, Ithaca, NY 14853 USA

[14] Univ Florida, Gainesville, FL 32611 USA

[15] Harvard Univ, Cambridge, MA 02138 USA

[16] Univ Illinois, Urbana, IL 61801 USA

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

[18] Ithaca Coll, Ithaca, NY 14850 USA

[19] Univ Kansas, Lawrence, KS 66045 USA

[20] Univ Minnesota, Minneapolis, MN 55455 USA

[21] SUNY Albany, Albany, NY 12222 USA

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

[23] Univ Oklahoma, Norman, OK 73019 USA

[24] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.87.251808

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the first and second moments of the hadronic mass-squared distribution in B --> X(c)l nu, for P-lepton > 1.5 GeV/c. We find (M-x(2) - (M) over bar (2)(D)) = 0.251 +/- 0.066 GeV2, ((M-X(2) - (M-X(2))(2)) = 0.576 +/- 0.170 GeV4, where (M) over bar (D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b --> s gamma, we find the heavy quark effective theory parameter lambda (1) (in the modified minimal subtraction renormalization scheme, to order 1/M-B(3) and beta (o)alpha (2)(s)) to be -0.24 +/- 0.11 GeV2. Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain \V-cb\ = 0.0404 +/- 0.0013.

引用

页码：1 / 251808

页数：5

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