COSMOLOGICAL CONSTRAINTS ON SUPERWEAK PARTICLES

被引：111

作者：

STEIGMAN, G

OLIVE, KA

SCHRAMM, DN

机构：

[1] STANFORD UNIV,INST PLASMA RES,STANFORD,CA 94305

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

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

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.43.239

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Previous work has used the primordial abundance of He4 to infer limits on the number of neutrinos with full-strength neutral-current weak interactions. By accounting for the quark-gluon constituents of hadrons, we extend the analysis to earlier times and higher temperatures and densities and, therefore, to considerably weaker interactions. The maximum number of new, superweakly interacting, light (a MeV) particles is between ∼1 and ∼20. © 1979 The American Physical Society.

引用

页码：239 / 242

页数：4

共 9 条

[1] QUARKS WITH COLOR AND FLAVOR [J].