SEARCH FOR THE DECAY PI(0)-]GAMMA-X

被引：6

作者：

DREES, RM

WALTHAM, CE

BLEVIS, I

HASINOFF, M

VIRTUE, CJ

GUMPLINGER, P

STETZ, A

POUTISSOU, JM

机构：

[1] OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331

[2] TRIUMF,VANCOUVER V6T 2A3,BC,CANADA

[3] CERN,DIV EP,CH-1211 GENEVA,SWITZERLAND

[4] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[5] LAURENTIAN UNIV,DEPT PHYS,SUDBURY P3E 2C6,ONTARIO,CANADA

来源：

PHYSICAL REVIEW D | 1994年 / 49卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.49.4937

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a search for exotic bosons produced in the decay pi0 --> Xgamma. A low energy pi- beam at TRIUMF was stopped in a liquid hydrogen target to produce the reactions pi- p --> ngamma and pi-p --> npi0, pi0 --> gamma. The gamma rays from these reactions were detected in a sodium iodide crystal. From the energy distributions we extract a branching ratio limit for GAMMA(pi0 --> gammaX)/GAMMA(pi0 --> gammagamma) of (2-7) X 10(-3) for X masses of 25-100 MeV/c2 (90% C.L.). In contrast with other experimental limits this branching ratio limit is valid for an reasonable X lifetimes (> 10(-23) sec).

引用

页码：4937 / 4940

页数：4

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