keV sterile neutrino dark matter from singlet scalar decays: basic concepts and subtle features

被引：108

作者：

Merle, Alexander ^{[1
]}

Totzauer, Maximilian ^{[1
]}

机构：

[1] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 06期

关键词：

particle physics - cosmology connection; dark matter theory; cosmological neutrinos; cosmology of theories beyond the SM; BIG-BANG NUCLEOSYNTHESIS; EMISSION-LINE; LIGHT; BBN; LEPTOGENESIS; PARTICLES; COSMOLOGY; RADIATION; ABUNDANCE; SPECTRUM;

D O I：

10.1088/1475-7516/2015/06/011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a detailed and illustrative study of the production of keV sterile neutrino Dark Matter (DM) by decays of singlet scalars in the early Universe. In the current study we focus on providing a clear and general overview of this production mechanism. For the first time we study all regimes possible on the level of momentum distribution functions, which we obtain by solving a system of Boltzmann equations. These quantities contain the full information about the production process, which allows us to not only track the evolution of the DM generation but to also take into account all bounds related to the spectrum, such as constraints from structure formation or from avoiding too much dark radiation. In particular we show that this simple production mechanism can, depending on the regime, lead to strongly non-thermal DM spectra which may even feature more than one peak in the momentum distribution. These cases could have particularly interesting consequences for cosmological structure formation, as their analysis requires more refined tools than the simplistic estimate using the free-streaming horizon. Here we present the mechanism including all concepts and subtleties involved, for now using the assumption that the effective number of relativistic degrees of freedom is constant during DM production, which is applicable in a significant fraction of the parameter space. This allows us to derive analytical results to back up our detailed numerical computations, thus leading to the most comprehensive picture of keV sterile neutrino DM production by singlet scalar decays that exists up to now.

引用

页数：39

共 98 条

[1] Dark matter in the minimal inverse seesaw mechanism [J].

Abada, Asmaa ;

Arcadi, Giorgio ;

Lucente, Michele .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2014, (10)

[2] Nonlinear cosmological matter power spectrum with massive neutrinos: The halo model [J].

Abazajian, K ;

Switzer, ER ;

Dodelson, S ;

Heitmann, K ;

Habib, S .

PHYSICAL REVIEW D, 2005, 71 (04) :043507-1

[3]

Abazajian K.N, ARXIV12045379

[4] Resonantly Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites [J].

Abazajian, Kevork N. .

PHYSICAL REVIEW LETTERS, 2014, 112 (16)

[5] Planck 2013 results. XVI. Cosmological parameters [J].

Ade, P. A. R. ;

Aghanim, N. ;

Armitage-Caplan, C. ;

Arnaud, M. ;

Ashdown, M. ;

Atrio-Barandela, F. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bobin, J. ;

Bock, J. J. ;

Bonaldi, A. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bridges, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cappellini, B. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chen, X. ;

Chiang, H. C. ;

Chiang, L. -Y ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. .

ASTRONOMY & ASTROPHYSICS, 2014, 571

[6] A fresh look at keV sterile neutrino dark matter from frozen-in scalars [J].

Adulpravitchai, Adisorn ;

Schmidt, Michael A. .

JOURNAL OF HIGH ENERGY PHYSICS, 2015, (01) :1-22

[7] Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS [J].

Agnese, R. ;

Anderson, A. J. ;

Asai, M. ;

Balakishiyeva, D. ;

Thakur, R. Basu ;

Bauer, D. A. ;

Beaty, J. ;

Billard, J. ;

Borgland, A. ;

Bowles, M. A. ;

Brandt, D. ;

Brink, P. L. ;

Bunker, R. ;

Cabrera, B. ;

Caldwell, D. O. ;

Cerdeno, D. G. ;

Chagani, H. ;

Chen, Y. ;

Cherry, M. ;

Cooley, J. ;

Cornell, B. ;

Crewdson, C. H. ;

Cushman, P. ;

Daal, M. ;

DeVaney, D. ;

Di Stefano, P. C. F. ;

Silva, E. Do Couto E. ;

Doughty, T. ;

Esteban, L. ;

Fallows, S. ;

Figueroa-Feliciano, E. ;

Godfrey, G. L. ;

Golwala, S. R. ;

Hall, J. ;

Hansen, S. ;

Harris, H. R. ;

Hertel, S. A. ;

Hines, B. A. ;

Hofer, T. ;

Holmgren, D. ;

Hsu, L. ;

Huber, M. E. ;

Jastram, A. ;

Kamaev, O. ;

Kara, B. ;

Kelsey, M. H. ;

Kenany, S. ;

Kennedy, A. ;

Kiveni, M. ;

Koch, K. .

PHYSICAL REVIEW LETTERS, 2014, 112 (24)

[8] First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility [J].

Akerib, D. S. ;

Araujo, H. M. ;

Bai, X. ;

Bailey, A. J. ;

Balajthy, J. ;

Bedikian, S. ;

Bernard, E. ;

Bernstein, A. ;

Bolozdynya, A. ;

Bradley, A. ;

Byram, D. ;

Cahn, S. B. ;

Carmona-Benitez, M. C. ;

Chan, C. ;

Chapman, J. J. ;

Chiller, A. A. ;

Chiller, C. ;

Clark, K. ;

Coffey, T. ;

Currie, A. ;

Curioni, A. ;

Dazeley, S. ;

de Viveiros, L. ;

Dobi, A. ;

Dobson, J. ;

Dragowsky, E. M. ;

Druszkiewicz, E. ;

Edwards, B. ;

Faham, C. H. ;

Fiorucci, S. ;

Flores, C. ;

Gaitskell, R. J. ;

Gehman, V. M. ;

Ghag, C. ;

Gibson, K. R. ;

Gilchriese, M. G. D. ;

Hall, C. ;

Hanhardt, M. ;

Hertel, S. A. ;

Horn, M. ;

Huang, D. Q. ;

Ihm, M. ;

Jacobsen, R. G. ;

Kastens, L. ;

Kazkaz, K. ;

Knoche, R. ;

Kyre, S. ;

Lander, R. ;

Larsen, N. A. ;

Lee, C. .

PHYSICAL REVIEW LETTERS, 2014, 112 (09)

[9]

Anderson M. E., ARXIV14084115

[10] Results on low mass WIMPs using an upgraded CRESST-II detector [J].

Angloher, G. ;

Bento, A. ;

Bucci, C. ;

Canonica, L. ;

Erb, A. ;

von Feilitzsch, F. ;

Iachellini, N. Ferreiro ;

Gorla, P. ;

Gutlein, A. ;

Hauff, D. ;

Huff, P. ;

Jochum, J. ;

Kiefer, M. ;

Kister, C. ;

Kluck, H. ;

Kraus, H. ;

Lanfranchi, J. -C. ;

Loebell, J. ;

Muenster, A. ;

Petricca, F. ;

Potzel, W. ;

Proebst, F. ;

Reindl, F. ;

Roth, S. ;

Rottler, K. ;

Sailer, C. ;

Schaffner, K. ;

Schieck, J. ;

Schmaler, J. ;

Scholl, S. ;

Schoenert, S. ;

Seidel, W. ;

von Sivers, M. ;

Stodolsky, L. ;

Strandhagen, C. ;

Strauss, R. ;

Tanzke, A. ;

Uffinger, M. ;

Ulrich, A. ;

Usherov, I. ;

Wawoczny, S. ;

Willers, M. ;

Wuestrich, M. ;

Zoeller, A. .

EUROPEAN PHYSICAL JOURNAL C, 2014, 74 (12)

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