OBSERVATION OF THE DECAY KL-]PI-0-GAMMA-GAMMA

被引：48

作者：

BARR, GD

CAROSI, R

COWARD, D

CUNDY, D

DOBLE, N

GATIGNON, L

GIBSON, V

GRAFSTROM, P

HAGELBERG, R

KESSELER, G

VANDERLANS, J

NELSON, HN

WAHL, H

BLACK, R

CANDLIN, DJ

MUIR, J

PEACH, KJ

BLUMER, H

HEINZ, R

KLEINKNECHT, K

MAYER, P

PANZER, B

RENK, B

ROHRER, H

AUGE, E

FOURNIER, D

HEUSSE, P

ICONOMIDOUFAYARD, L

HARRUS, I

LUTZ, AM

PERDEREAU, O

SCHAFFER, AC

SERIN, L

BERTANZA, L

BIGI, A

CALAFIURA, P

CALVETTI, M

CASALI, R

CERRI, C

FANTECHI, R

MANNELLI, I

NAPPI, A

PIERAZZINI, GM

BURKHARDT, H

HOLDER, M

KREUTZ, A

QUAST, G

ROST, M

SANDER, HG

WEIHS, W

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,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE

[4] DIPARTIMENTO FIS,I-56100 PISA,ITALY

[5] IST NAZL FIS NUCL,PISA,ITALY

[6] UNIV GESAMTHSCH SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN 21,GERMANY

来源：

PHYSICS LETTERS B | 1990年 / 242卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(90)91806-M

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decay mode KL→π0γγ has been observed with a signal of 21 events and an expected background of 1.5±0.9 events. A branching ratio for decays with invariant γγ masses above 280 MeV of (2.1±0.6)×10-6 is calculated. This result is compared with the values estimated from theoretical models and has implications for the CP conserving contribution to KL→π0e+e- decay. © 1990.

引用

页码：523 / 530

页数：8

共 22 条

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