期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 3, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP03(2020)022
关键词
Beyond Standard Model; Cosmology of Theories beyond the SM; Higgs; Physics
资金
- Programa Atraccion de Talento de la Comunidad de Madrid [2017-T2/TIC-5455, 2017-T1/TIC-5202]
- Deutsche Forschungsgemeinschaft (DFG) through the Emmy Noether Grant [KA 4662/1-1]
- Collaborative Research Center [TRR 257]
- Spanish MINECO's Centro de Excelencia Severo Ochoa Programme [SEV-2016-0597]
- European Research Council under the European Union's Horizon 2020 program, ERC [648680]
- European Research Council (ERC) [648680] Funding Source: European Research Council (ERC)
Collider searches for long-lived particles yield a promising avenue to probe the freeze-in production of Dark Matter via the decay of a parent particle. We analyze the prospects of probing the parameter space of Dark Matter freeze-in from the decay of neutral parent particles at the LHC and beyond, taking as a case study a freeze-in Dark Matter scenario via the Standard Model Higgs. We obtain the projected sensitivity of the proposed MATHUSLA surface detector (for MATHUSLA100 and MATHUSLA200 configurations) for long-lived particle searches to the freeze-in Dark Matter parameter space, and study its complementarity to searches by ATLAS and CMS at HL-LHC, as well as the interplay with constraints from Cosmology: Big-Bang Nucleosynthesis and Lyman-alpha forest observations. We then analyze the improvement in sensitivity that would come from a forward detector within a future 100 TeV pp-collider. In addition, we discuss several technical aspects of the present Dark Matter freeze-in scenario: the role of the electroweak phase transition; the inclusion of thermal masses, which have been previously disregarded in freeze-in from decay studies; the impact of 2 -> 2 scattering processes on the Dark Matter relic abundance; and the interplay between freeze-in and super-WIMP Dark Matter production mechanisms.
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