A MEASUREMENT OF THE DECAY KL -]PI-0-GAMMA-GAMMA

被引：39

作者：

BARR, GD

BUCHHOLZ, P

CAROSI, R

COWARD, D

CUNDY, D

DOBLE, N

GATIGNON, L

GRAFSTROM, P

HAGELBERG, R

NELSON, HN

WAHL, H

PEACH, KJ

BLUMER, H

HEINZ, R

KLEINKNECHT, K

MAYER, P

PANZER, B

RENK, B

ROHRER, H

WAGNER, A

AUGE, E

FOURNIER, D

ICONOMIDOUFAYARD, L

HARRUS, I

PERDEREAU, O

SCHAFFER, AC

SERIN, L

BERTANZA, L

BIGI, A

CALAFIURA, P

CALVETTI, M

CASALI, R

MANNELLI, IG

MARZULLI, VM

NAPPI, A

PIERAZZINI, G

HOLDER, M

KREUTZ, A

ROST, M

WERTHENBACH, R

机构：

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

[2] UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY

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

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

[5] UNIV SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN,GERMANY

来源：

PHYSICS LETTERS B | 1992年 / 284卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)90458-G

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The full data set of the experiment NA31 at CERN has been used to analyse the decay mode K(L) --> pi-0-gamma-gamma. A signal of 63 events has been observed with an estimated background of 6.0+/-1.7 events, corresponding to a branching ratio of (1.7+/-0.3) x 10(-6) consistent with our previous result based on partial statistics. The invariant mass spectrum of the two photons is found to be consistent with chiral perturbation theory, and the decay is dominated by the J=0 two-photon state.

引用

页码：440 / 447

页数：8