Cosmological bounds on dark-matter-neutrino interactions

被引：108

作者：

Mangano, Gianpiero ^{[1
]}

Melchiorri, Alessandro

Serra, Paolo

Cooray, Asantha

Kamionkowski, Marc

机构：

[1] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy

[2] Univ Naples Federico II, Sez INFN, I-80126 Naples, Italy

[3] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[4] Univ Roma La Sapienza, Sez INFN, I-00185 Rome, Italy

[5] Univ Calif Irvine, Ctr Cosmol, Dept Phys & Astron, Irvine, CA 92697 USA

[6] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW D | 2006年 / 74卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.74.043517

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the cosmological effects of a neutrino interaction with cold dark-matter. We postulate a neutrino that interacts with a "neutrino-interacting dark-matter" (NIDM) particle with an elastic-scattering cross section that either decreases with temperature as T-2 or remains constant with temperature. The neutrino-dark-matter interaction results in a neutrino-dark-matter fluid with pressure, and this pressure results in diffusion-damped oscillations in the matter power spectrum, analogous to the acoustic oscillations in the baryon-photon fluid. We discuss the bounds from the Sloan Digital Sky Survey on the NIDM opacity (ratio of cross section to NIDM-particle mass) and compare with the constraint from observation of neutrinos from supernova 1987A. If only a fraction of the dark matter interacts with neutrinos, then NIDM oscillations may affect current cosmological constraints from measurements of galaxy clustering. We discuss how detection of NIDM oscillations would suggest a particle-antiparticle asymmetry in the dark-matter sector.

引用

页数：10

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