Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/03/101
Keywords
cosmology of theories beyond the SM; dark matter theory; inflation; Lyman alpha forest
Funding
- Contrato de Atraccion de Talento (Modalidad 1) de la Comunidad de Madrid (Spain) [2017-T1/TIC5520]
- MINECO (Spain) [FPA2016-78022-P]
- MCIU (Spain) [PGC2018-096646-A-I00]
- Spanish Agencia Estatal de Investigacion [FPA2015-65929-P, PGC2018-095161-B-I00]
- Red Consolider MultiDark [FPA2017-90566-REDC]
- IFT Centro de Excelencia Severo Ochoa Grant [SEV2016-0597]
- Paris-Saclay Particle Symposium 2019
- P2IO Laboratory of Excellence [ANR-10-LABX-0038, ANR-11-IDEX-0003-01]
- CNRS
- Laboratoire de Physique des 2 Infinis Irene Joliot-Curie
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This study investigates the power spectrum of Non-Cold Dark Matter produced in a state out of thermal equilibrium, considering various sources of dark matter production. A mapping procedure is proposed to translate the WDM Lyman-alpha mass bound to NCDM scenarios, providing bounds on several NCDM possibilities. The results have implications for specific examples of dark matter scenarios.
We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out of thermal equilibrium. We consider dark matter production from the decay of scalar condensates (inflaton, moduli), the decay of thermalized and non-thermalized particles, and from thermal and non-thermal freeze-in. For each case, we compute the NCDM phase space distribution and the linear matter power spectrum, which features a cutoff analogous to that for Warm Dark Matter (WDM). This scale is solely determined by the equation of state of NCDM. We propose a mapping procedure that translates the WDM Lyman-alpha mass bound to NCDM scenarios. This procedure does not require expensive ad hoc numerical computations of the non-linear matter power spectrum. By applying it, we obtain bounds on several NCDM possibilities, ranging from m(DM) greater than or similar to EeV for DM production from inflaton decay with a low reheating temperature, to sub-keV values for non-thermal freeze-in. We discuss the phenomenological implications of these results for specific examples which include strongly-stabilized and non-stabilized supersymmetric moduli, gravitino production from inflaton decay, Z ' and spin-2 mediated freeze-in, and non-supersymmetric spin-3/2 DM.
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