Measurement of the decay rate of the radiative K-e3(0) decay

被引：10

作者：

Leber, F

Beier, T

Blumer, H

Coward, D

Kleinknecht, K

Renk, B

Sander, HG

Scheerer, F

Scheidt, J

Staeck, J

Wagner, A

Barr, GD

Buchholz, P

Doble, N

Gatignon, L

Grafstrom, P

Hagelberg, R

Wahl, H

Peach, KJ

Auge, E

Fournier, D

IconomidouFayard, L

Perdereau, O

Schaffer, AC

Serin, L

Calafiura, P

Carosi, R

Casali, R

Mannelli, I

Marzulli, VM

Nappi, A

Pierazzini, GM

机构：

[1] CERN,CH-1211 GENEVA 23,SWITZERLAND

[2] UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND

[3] UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,CNRS,IN2P3,F-91406 ORSAY,FRANCE

[4] SCUOLA NORMALE SUPER PISA,DIPARTIMENTO FIS,I-56100 PISA,ITALY

[5] IST NAZL FIS NUCL,I-56100 PISA,ITALY

来源：

PHYSICS LETTERS B | 1996年 / 369卷 / 01期

关键词：

D O I：

10.1016/0370-2693(95)01528-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Data from the NA31 experiment at CERN have been used to measure the decay K-L --> pi(+/-)e(-/+)v gamma (K-e3 gamma(0)). 1384 +/- 53 events of this decay type have been observed, The decay rate relative to K-e3(0) is found to be Gamma(K-e3 gamma(0), E(gamma)* greater than or equal to 30 MeV, Theta(e-gamma)* greater than or equal to 20 degrees)/Gamma(K-e3(0)) = (0.934 +/- 0.036(stat.)(-0.039)(+0.055)(syst.))% which corresponds to a branching ratio of BR(K-e3 gamma(0),E(gamma)* greater than or equal to 30 MeV, Theta(e-gamma)* greater than or equal to 20 degrees) = (0.361 +/- 0.014(stat.)(-0.015)(+0.021)(syst.))%. The result is in good agreement with theoretical predictions, The decay K-L --> pi(+/-)e(-/+)v gamma is found to be dominated by internal bremsstrahlung.

引用

页码：69 / 76

页数：8

共 12 条

[11] HADRONIC ZZ, W-W+, AND W+/-Z PRODUCTION WITH QCD CORRECTIONS AND LEPTONIC DECAYS [J].