SIMULTANEOUS MEASUREMENT OF K(S) AND K(L) DECAYS INTO PI+PI-GAMMA

被引：52

作者：

RAMBERG, EJ

BOCK, GJ

COLEMAN, R

ENAGONIO, J

HSIUNG, YB

STANFIELD, K

TSCHIRHART, R

YAMANAKA, T

BARKER, A

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] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544

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

来源：

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

关键词：

D O I：

10.1103/PhysRevLett.70.2525

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With the E731 apparatus at Fermilab, we have simultaneously collected 6859 K(L) and K(S) decays into pi+pi-gamma. Using our sample of over 370000 pi+pi- decays for normalization we have determined that the ratio GAMMA(K0 --> pi+pi-gamma)/GAMMA(K0 --> pi+pi-) is (23.0 +/- 0.7) x 10(-3) for K(L) and (7.10 +/- 0.22) x 10(-3) for K(S), for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the K(L) is consistent with the presence of a vector meson propagator in the form factor.

引用

页码：2525 / 2528

页数：4

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