STUDY OF THE DECAY K+-]PI+E+E-

被引：59

作者：

ALLIEGRO, C

CAMPAGNARI, C

CHALOUPKA, V

COOPER, PS

EGGER, J

GORDON, HA

HADLEY, NJ

HEROLD, WD

KASPAR, H

LEE, AM

LAZARUS, DM

LUBATTI, HJ

REHAK, P

ZELLER, ME

ZHAO, T

机构：

[1] FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510

[2] SWISS INST NUCL RES,PAUL SCHERRER INST,CH-5234 VILLIGEN,SWITZERLAND

[3] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

[4] YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.68.278

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of an experiment in which approximately 500 events of the decay K + --> pi+ e+ e-were observed. We have measured the branching ratio for K(pi-ee)+ to be (2.75 +/- 0.23 +/- 0.13) x 10(-7) assuming a vector interaction with a form factor of lambda = 0.105 +/- 0.035 +/- 0.015. We have also found the branching ratio times decay probability for K + --> pi+ X0, X0 --> e+ e- to be less than 1.5 x 10(-8) (99% C. L.) over an X0 invariant mass range from 150 to 340 MeV/c2.

引用

页码：278 / 281

页数：4

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