Bounds on the CP asymmetry in b → sγ decays

被引：50

作者：

Coan, TE ^{[1
]}

Fadeyev, V

Maravin, Y

Narsky, I

Stroynowski, R

Ye, J

Wlodek, T

Artuso, M

Ayad, R

Boulahsuache, C

Bukin, K

Dambasuren, E

Karamov, S

Majumder, G

Moneti, GC

Mountain, R

Schuh, S

Skwarnicki, T

Stone, S

Viehhauser, G

Wang, JC

Wolf, A

Wu, J

Kopp, S

Mahmood, AH

Csorna, SE

Danko, I

McLean, KW

Xu, Z

Godang, R

Bonvicini, G

Cinabro, D

Dubrovin, M

McGee, S

Zhou, GJ

Lipeles, E

Pappas, SP

Schmidtler, M

Shapiro, A

Sun, WM

Weinstein, AJ

Würthwein, F

Jaffe, DE

Masek, G

Paar, HP

Potter, EM

Prell, S

Asner, DM

Eppich, A

Hill, TS

机构：

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

[2] Syracuse Univ, Syracuse, NY 13244 USA

[3] Univ Texas, Austin, TX 78712 USA

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

[5] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

[8] CALTECH, Pasadena, CA 91125 USA

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

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

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

[12] Univ Colorado, Boulder, CO 80309 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] Inst Particle Phys, Ottawa, ON, Canada

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

[20] Ithaca Coll, Ithaca, NY 14850 USA

[21] Univ Kansas, Lawrence, KS 66045 USA

[22] Univ Minnesota, Minneapolis, MN 55455 USA

[23] SUNY Albany, Albany, NY 12222 USA

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

[25] Univ Oklahoma, Norman, OK 73019 USA

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

[27] Univ Rochester, Rochester, NY 14627 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.86.5661

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the CP asymmetry A(CP) equivalent to [Gamma (b --> sy) - Gamma((b) over bar --> ($) over bar gamma)]/[Gamma (b --> s gamma) + Gamma((b) over bar --> (s) over bar gamma)] to be A(CP) = (-0.079 +/- 0.108 +/- 0.022)(1.0 +/- 0.030), implying that, at 90% confidence level, A(CP) lies between -0.27 and +/- 0.10. These limits rule out some extreme non-standard-model predictions, but are consistent with most, as well as with the standard model.

引用

页码：5661 / 5665

页数：5

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