Cosmological and astrophysical bounds on a 33.9 MeV sterile neutrino

D. Semikoz
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Abstract

Abstract In this talk we discuss astrophysical and cosmological bounds on heavy sterile neutrino with mass mvs = 33.9MeV, which was suggested some time ago as a possible interpretation of KARMEN anomaly. Combine experimental data constrain lifetime of this particle in the window ∼ 10−1sec < TS < 150 sec. We show that SN 1987A completely excludes this range of vs lifetime. Nucleosynthesis bound permit a narrow window for the TS around 0.1 sec. If vs possesses an anomalous interaction with nucleons, the SN bounds may not apply, while the nucleosynthesis ones would remain valid.
33.9 MeV无菌中微子的宇宙学和天体物理学界限
本文讨论了质量为mvs = 33.9MeV的重惰性中微子的天体物理和宇宙学边界,这是前段时间提出的KARMEN异常的可能解释。结合实验数据将该粒子的寿命限定在窗口~ 10−1sec < TS < 150 sec。我们发现SN 1987A完全排除了这个vs寿命范围。核合成界允许TS的窄窗口在0.1秒左右。如果vs具有与核子的异常相互作用,SN界可能不适用,而核合成界仍然有效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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