Branching fraction and photon energy spectrum for b→sγ -: art. no. 251807

被引：433

作者：

Chen, S ^{[1
]}

Hinson, JW

Lee, J

Miller, DH

Pavlunin, V

Shibata, EI

Shipsey, LPJ

Cronin-Hennessy, D

Lyon, AL

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, S

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, SR

Shapiro, A

Sun, WM

Weinstein, AJ

Jaffe, DE

Mahapatra, R

机构：

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

[2] Univ Rochester, Rochester, NY 14627 USA

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

[4] Syracuse Univ, Syracuse, NY 13244 USA

[5] Univ Texas, Austin, TX 78712 USA

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

[7] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

[10] CALTECH, Pasadena, CA 91125 USA

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

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

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

[14] Cornell Univ, Ithaca, NY 14853 USA

[15] Univ Florida, Gainesville, FL 32611 USA

[16] Harvard Univ, Cambridge, MA 02138 USA

[17] Univ Illinois, Urbana, IL 61801 USA

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

[19] Ithaca Coll, Ithaca, NY 14850 USA

[20] Univ Kansas, Lawrence, KS 66045 USA

[21] Univ Minnesota, Minneapolis, MN 55455 USA

[22] SUNY Albany, Albany, NY 12222 USA

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

[24] Univ Oklahoma, Norman, OK 73019 USA

[25] Univ Pittsburgh, Pittsburgh, PA 15260 USA

来源：

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

关键词：

D O I：

10.1103/PhysRevLett.87.251807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the branching fraction and photon energy spectrum for the radiative penguin process b --> s gamma. We find B(b --> s gamma) = (3.21 +/- 0.43 +/- 0.27(-0.10)(+0.18)) x 10(-4), where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, (E gamma) = 2.346 +/- 0.032 +/- 0.011 GeV, and (E-gamma(2)) - (E-gamma)(2) = 0.0226 +/- 0.0066 +/- 0.0020 GeV2, where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M-B(3) and beta (o)alpha (2)(s)) the heavy quark effective theory parameter <(<Lambda>)over bar> = 0.35 +/- 0.08 +/- 0.10 GeV.

引用

页数：5

共 25 条

[1] O(ALPHA(S)) CALCULATION OF THE DECAYS B-]S+GAMMA AND B-]S+G [J].

ADEL, K ;

YAO, YP .

PHYSICAL REVIEW D, 1994, 49 (09) :4945-4948

[2] SQUARK PRODUCTION AT THE FERMILAB TEVATRON [J].

BEENAKKER, W ;

HOPKER, R ;

SPIRA, M ;

ZERWAS, PM .

PHYSICAL REVIEW LETTERS, 1995, 74 (15) :2905-2908

[3] A PROFILE OF THE FINAL-STATES IN B-]XS+GAMMA AND AN ESTIMATE OF THE BRANCHING RATIO BR(B-]K-STAR+GAMMA) [J].

ALI, A ;

GREUB, C .

PHYSICS LETTERS B, 1991, 259 (1-2) :182-190

[4] PHOTON ENERGY-SPECTRUM IN B-]X(S)+GAMMA AND COMPARISON WITH DATA [J].

ALI, A ;

GREUB, C .

PHYSICS LETTERS B, 1995, 361 (1-4) :146-154

[5]

ALI A, COMMUNICATION

[6] Corrections to moments of the photon spectrum in the inclusive decay B→Xsγ [J].

Bauer, C .

PHYSICAL REVIEW D, 1998, 57 (09) :5611-5619

[7] Weak radiative B-meson decay beyond leading logarithms [J].

Chetyrkin, K ;

Misiak, M ;

Munz, M .

PHYSICS LETTERS B, 1997, 400 (1-2) :206-219

[8] Hadronic mass moments in inclusive semileptonic B meson decays -: art. no. 251808 [J].

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 .

PHYSICAL REVIEW LETTERS, 2001, 87 (25) :1-251808

[9] Electroweak radiative corrections to b→sγ [J].

Czarnecki, A ;

Marciano, WJ .

PHYSICAL REVIEW LETTERS, 1998, 81 (02) :277-280

[10]

De Fazio F, 1999, J HIGH ENERGY PHYS

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