Asymmetric dark matter and effective number of neutrinos

被引：4

作者：

Kitabayashi, Teruyuki ^{[1
]}

Kurosawa, Yoshihiro ^{[1
]}

机构：

[1] Tokai Univ, Dept Phys, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 03期

关键词：

STABLE PARTICLES; ANNIHILATIONS; BARYON; LIMITS;

D O I：

10.1103/PhysRevD.93.033002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the effect of the MeV-scale asymmetric dark matter annihilation on the effective number of neutrinos N-eff at the epoch of the big bang nucleosynthesis. If the asymmetric dark matter chi couples more strongly to the neutrinos nu than to the photons gamma and electrons e(-), Gamma(chi gamma,chi e) << Gamma(chi nu), or Gamma(chi gamma,chi e) >> Gamma(chi nu), the lower mass limit on the asymmetric dark matter is about 18 MeV for N-eff similar or equal to 3.0.

引用

页数：14

共 81 条

[1]

Ade P. A. R., ARXIV150201589V2 PLA

[2] 3.55 keV line in minimal decaying dark matter scenarios [J].

Arcadi, Giorgio ;

Covi, Laura ;

Dradi, Federico .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2015, (07)

[3] Particle-Antiparticle Asymmetries from Annihilations [J].

Baldes, Iason ;

Bell, Nicole F. ;

Petraki, Kalliopi ;

Volkas, Raymond R. .

PHYSICAL REVIEW LETTERS, 2014, 113 (18)

[4] ELECTROWEAK FERMION NUMBER VIOLATION AND THE PRODUCTION OF STABLE PARTICLES IN THE EARLY UNIVERSE [J].

BARR, SM ;

CHIVUKULA, RS ;

FARHI, E .

PHYSICS LETTERS B, 1990, 241 (03) :387-391

[5] Gamma-ray constraint on galactic positron production by MeV dark matter [J].

Beacom, JF ;

Bell, NF ;

Bertone, G .

PHYSICAL REVIEW LETTERS, 2005, 94 (17)

[6] Stringent constraint on galactic positron production [J].

Beacom, John F. ;

Yuksel, Hasan .

PHYSICAL REVIEW LETTERS, 2006, 97 (07)

[7] Annihilating asymmetric dark matter [J].

Bell, Nicole F. ;

Horiuchi, Shunsaku ;

Shoemaker, Ian M. .

PHYSICAL REVIEW D, 2015, 91 (02)

[8] Asymmetric Dark Matter and Dark Radiation [J].

Blennow, Mattias ;

Martinez, Enrique Fernandez ;

Mena, Olga ;

Redondo, Javier ;

Serra, End Paolo .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, (07)

[9] Cosmology of fermionic dark matter [J].

Boeckel, Tillmann ;

Schaffner-Bielich, Juergen .

PHYSICAL REVIEW D, 2007, 76 (10)

[10] Light dark matter annihilations into two photons [J].

Boehm, C. ;

Orloff, J. ;

Salati, P. .

PHYSICS LETTERS B, 2006, 641 (3-4) :247-253

← 1 2 3 4 5 6 7 8 9 →