Constraints on dark matter-neutrino scattering from the Milky-Way satellites and subhalo modeling for dark acoustic oscillations

被引：12
|
作者：
Akita, Kensuke [1 ]
Ando, Shin'ichiro [2 ,3 ]
机构：
[1] Inst Basic Sci IBS, Ctr Theoret Phys Universe, Particle Theory & Cosmol Grp, Daejeon 34126, South Korea
[2] Univ Amsterdam, GRAPPA Inst, NL-1098 XH Amsterdam, Netherlands
[3] Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, WPI, Kashiwa, Chiba 2778583, Japan
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 11期
关键词：
dark matter theory; neutrino properties; particle physics-cosmology connection; dwarfs galaxies; RADIATION INTERACTIONS; ACCRETION HISTORY; MASS FUNCTIONS; LAMBDA-CDM; HALOES; COLD; SUBSTRUCTURE; POPULATION; GALAXIES; I;
D O I：
10.1088/1475-7516/2023/11/037
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The elastic scattering between dark matter (DM) and radiation can potentially explain small-scale observations that the cold dark matter faces as a challenge, as damping density fluctuations via dark acoustic oscillations in the early universe erases small-scale structure. We study a semi-analytical subhalo model for interacting dark matter with radiation, based on the extended Press-Schechter formalism and subhalos' tidal evolution prescription. We also test the elastic scattering between DM and neutrinos using observations of Milky-Way satellites from the Dark Energy Survey and PanSTARRS1. We conservatively impose strong constraints on the DM-neutrino scattering cross section of sigma(DM-nu,n) proportional to E-nu(n) (n = 0,2,4) at 95% confidence level (CL), sigma(DM-nu,0) < 10(-32) cm(2) (m(DM)/ GeV), sigma(DM-nu,2) < 10(-43) cm(2) (m(DM)/ GeV)(E-nu/E-nu(0))(2) and sigma(DM-nu,4) < 10(-54) cm(2) (m(DM)/GeV)(E-nu/E-nu(0))(4), where E-nu(0) is the neutrino energy and E-nu(0) is the average momentum of relic cosmic neutrinos today, E-nu(0) similar or equal to 6.1 K. By imposing a satellite forming condition, we obtain the strongest upper bounds on the DM-neutrino cross section at 95% CL, sigma(DM-nu,0) < 4 <bold>x</bold> 10(-34) cm(2) (m(DM)/ GeV), sigma(DM-nu,2) < 10(-46) cm(2) (m(DM)/ GeV)(E-nu/E-nu(0))(2) and sigma(DM-nu,4) < 7 <bold>x</bold> 10(-59) cm(2) (m(DM)/GeV)(E-nu/E-nu(0))(4).
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页数：27
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