Cosmology seeking friendship with sterile neutrinos

被引：1

作者：

Hamann, J. ^{[1
]}

Hannestad, S. ^{[1
]}

Raffelt, G. G. ^{[2
]}

Tamborra, I. ^{[2
,3
,4
]}

Wong, Y. Y. Y. ^{[5
]}

机构：

[1] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

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

[3] Dipartimento Interateneo Fis Michelangelo Merlin, I-70126 Bari, Italy

[4] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[5] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, D-52056 Aachen, Germany

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2011年 / 217卷

关键词：

POLARIZATION; ABUNDANCE;

D O I：

10.1016/j.nuclphysbps.2011.04.072

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：

Precision cosmology and big-bang nucleosynthesis mildly favour extra radiation in the universe beyond photons and ordinary neutrinos, lending support to the existence of low-mass sterile neutrinos. We present bounds on the common mass scale m(s) and effective number N-s of thermally excited sterile neutrino states from the most recent cosmological data. Our results are compatible with the existence of one or perhaps two sterile neutrinos, as suggested by LSND and MiniBooNE, if m(s) is in the sub-eV range.

引用

页码：72 / 74

页数：3

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