MEASUREMENT OF THE BRANCHING RATIO AND A STUDY OF CP FOR THE LEPTONICDECAY KAPPA(L)-]E-E+E-(E)

Authors
GU P HAAS P HOGAN WP KIM SK MATTHES JN MYUNG SS SCHNETZER S THOMSON GB ZOU Y ARISAKA K ROBERTS D SLATER W WEAVER M BRIERE RA CHEU E HARRIS DA MCFARLAND KS ROODMAN A SCHWINGENHEUER B SOMALWAR SV WAH YW WINSTEIN B WINSTON R BARKER AR SWALLOW EC BOCK GJ COLEMAN R CRISLER M ENAGONIO J FORD R HSIUNG YB JENSEN DA RAMBERG E TSCHIRHART R COLLINS EM GOLLIN GD NAKAYA T YAMANAKA T
Citation
P. Gu et al., MEASUREMENT OF THE BRANCHING RATIO AND A STUDY OF CP FOR THE LEPTONICDECAY KAPPA(L)-]E-E+E-(E), Physical review letters, 72(19), 1994, pp. 3000-3003
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
19
Year of publication
1994
Pages
3000 - 3003
Database
ISI
SICI code
0031-9007(1994)72:19<3000:MOTBRA>2.0.ZU;2-Y
Abstract
We have determined the branching ratio of K(L) --> e+e-e+e-; based on the observation of 27 four-electron final state events with 0.36 estim ated background event, B(K(L) --> e+e-e+e-) = [3.96 +/- 0.78(stat) +/- 0.32(syst)] x 10(-8). Using the distribution of the angle between the e+e- pair decay planes, we find that the decay proceeds predominantly through the K2 (CP = -1) state.