MEASUREMENT OF THE CP-VIOLATION PARAMETER ETA+-GAMMA IN NEUTRAL KAON DECAYS

被引：20

作者：

RAMBERG, EJ

BOCK, GJ

COLEMAN, R

ENAGONIO, J

HSIUNG, YB

STANFIELD, K

TSCHIRHART, R

YAMANAKA, T

BARKER, AR

BRIERE, RA

GIBBONS, LK

MAKOFF, G

PAPADIMITRIOU, V

PATTERSON, JR

SOMALWAR, S

WAH, YW

WINSTEIN, B

WINSTON, R

WOODS, M

YAMAMOTO, H

SWALLOW, EC

BLAIR, G

GOLLIN, GD

KARLSSON, M

OKAMITSU, JK

DEBU, P

PEYAUD, B

TURLAY, R

VALLAGE, B

机构：

[1] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[2] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[3] ELMHURST COLL,DEPT PHYS,ELMHURST,IL 60126

[4] CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE

[5] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.70.2529

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Interference between K(S) and K(L) decays into the final state pi+pi-gamma has been observed in experiment 731 at Fermilab. By fitting the distribution of decays downstream of a regenerator, a new CP-violation parameter eta+-gamma, analogous to eta+-, has been measured, with its magnitude equal to (2.15 +/- 0.26 +/- 0.20) x 10(-3), and phi+-gamma, the associated phase angle, equal to (72 +/- 23 +/- 17)degrees. Assuming that any difference between this fit value for eta+-, and the previously measured value for eta+- can be attributed to direct CP violation in this decay, a limit of \epsilon'+-gamma\/epsilon < 0.3 at the 90% confidence level has been made.

引用

页码：2529 / 2532

页数：4

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