Cosmological and astrophysical bounds on a heavy sterile neutrino and the KARMEN anomaly

被引：79

作者：

Dolgov, AD

Hansen, SH

Raffelt, G

Semikoz, DV

机构：

[1] Ist Nazl Fis Nucl, Sect Ferrara, I-44100 Ferrara, Italy

[2] Max Planck Inst Phys, Werner Heisenberg Inst, D-80805 Munich, Germany

[3] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[4] ITEP, Moscow 113259, Russia

来源：

NUCLEAR PHYSICS B | 2000年 / 580卷 / 1-2期

关键词：

KARMEN anomaly; sterile neutrino; supernova; nucleosynthesis;

D O I：

10.1016/S0550-3213(00)00203-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Constraints on the lifetime of the heavy sterile neutrino, that was proposed as a possible interpretation of the KARMEN anomaly, are derived from primordial nucleosynthesis and SN 1987A. Together with the recent experimental bounds on the nu(s), lifetime, SN 1987A completely excludes this interpretation. Nucleosynthesis. arguments permit a narrow window for the lifetime in the interval 0.1-0.2 s. If nu(s) possesses an anomalous interaction with nucleons, the SN bounds may not apply, while the nucleosynthesis ones would remain valid. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：331 / 351

页数：21

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