CAN THE UPSILON DECAY INTO COSMIONS

被引：20

作者：

FAYET, P

KAPLAN, J

机构：

[1] UNIV PARIS 11,F-91405 ORSAY,FRANCE

[2] UNIV PARIS 06,PHYS THEOR & HAUTES ENERGIES LAB,F-75251 PARIS 05,FRANCE

[3] UNIV PARIS 07,CNRS,UA 280,F-75251 PARIS 05,FRANCE

来源：

PHYSICS LETTERS B | 1991年 / 269卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(91)91477-D

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate some constraints on cosmions from accelerator experiments. Searches for single photon events in e+e- annihilations show that cosmions can only be weakly coupled to electrons. As for their couplings to quarks, the bound on the decay UPSILON --> gamma + unobserved neutrals significantly reduces the allowed parameter space for axially coupled cosmions, whereas a reduction of the present bound on the branching ratio B(UPSILON --> unobserved neutrals) would allow one to test the higher cross-section window among the two remaining open for vectorially coupled cosmions.

引用

页码：213 / 219

页数：7

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