EVIDENCE FOR PENGUIN-DIAGRAM DECAYS - 1ST OBSERVATION OF B -] K-ASTERISK(892)GAMMA

被引：392

作者：

AMMAR, R

BALL, S

BARINGER, P

COPPAGE, D

COPTY, N

DAVIS, R

HANCOCK, N

KELLY, M

KWAK, N

LAM, H

KUBOTA, Y

LATTERY, M

NELSON, JK

PATTON, S

PERTICONE, D

POLING, R

SAVINOV, V

SCHRENK, S

WANG, R

ALAM, MS

KIM, IJ

NEMATI, B

ONEILL, JJ

SEVERINI, H

SUN, CR

ZOELLER, MM

CRAWFORD, G

DAUBENMEIR, M

FULTON, R

FUJINO, D

GAN, KK

HONSCHEID, K

KAGAN, H

KASS, R

LEE, J

MALCHOW, R

MORROW, F

SKOVPEN, Y

SUNG, M

WHITE, C

WHITMORE, J

WILSON, P

BUTLER, F

FU, X

KALBFLEISCH, G

LAMBRECHT, M

ROSS, WR

SKUBIC, P

SNOW, J

WANG, PL

机构：

[1] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[2] SUNY,ALBANY,NY 12222

[3] OHIO STATE UNIV,COLUMBUS,OH 43210

[4] UNIV OKLAHOMA,NORMAN,OK 73019

[5] PURDUE UNIV,W LAFAYETTE,IN 47907

[6] UNIV ROCHESTER,ROCHESTER,NY 14627

[7] SO METHODIST UNIV,DALLAS,TX 75275

[8] VANDERBILT UNIV,NASHVILLE,TN 37235

[9] CALTECH,PASADENA,CA 91125

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

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

[12] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213

[13] UNIV COLORADO,BOULDER,CO 80309

[14] CORNELL UNIV,ITHACA,NY 14853

[15] UNIV FLORIDA,GAINESVILLE,FL 32611

[16] HARVARD UNIV,CAMBRIDGE,MA 02138

[17] UNIV ILLINOIS,URBANA,IL 61801

[18] ITHACA COLL,ITHACA,NY 14850

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.71.674

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed the decays B0 --> K*(892)0gamma and B- --> K*(892)-gamma, which are evidence for the quark-level process b --> sgamma. The average branching fraction is (4.5 +/- 1.5 +/- 0.9) x 10(-5). This value is consistent with standard model predictions from electromagnetic penguin diagrams.

引用

页码：674 / 678

页数：5

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