Cold light dark matter in extended seesaw models

Boulebnane, Sami; Heeck, Julian; Nguyen, Anne; Teresi, Daniele

doi:10.1088/1475-7516/2018/04/006

Cited by 46 publications

(72 citation statements)

References 95 publications

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“…The most stringent limits in this case are Lyman-α forest observations by means of which, limits ranging from m DM 4.09 keV [82] up to m DM 5.3 keV [83] have been obtained for warm DM produced via conventional thermal freeze-out. An intermediate value m DM 4.65 keV [84,85] was used in [86,87] in order to translate this limit to the case of freeze-in DM produced via two-body decays of a parent particle in thermal equilibrium with the plasma . The corresponding limit reads…”

Section: Cosmological Boundsmentioning

confidence: 99%

LHC-friendly minimal freeze-in models

Bélanger

Desai

Goudelis

et al. 2019

J. High Energ. Phys.

136

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We propose simple freeze-in models where the observed dark matter abundance is explained via the decay of an electrically charged and/or coloured parent particle into Feebly Interacting Massive Particles (FIMP). The parent particle is long-lived and yields a 1 The HL-LHC is expected to produce ∼ 10 8 Higgs bosons. Typical freeze-in values for yχ lie in the O(10 −13 − 10 −7 ) range, would yield less than 10 −4 DM events at the HL-LHC in our scenario.2 Since, as we will see later on, the DM production at the LHC will occur via the Y Y final state, fermions will have slightly larger production cross-sections than scalars.3 See Ref.[57] for an exception to this, mostly focused on χ being a fermion (a gravitino in Gauge-Mediated Supersymmetry Breaking scenarios) and Y being a scalar lepton (a right-handed stau), but also considering the case of a scalar χ and a fermionic, right-handed Y .

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Section: Cosmological Boundsmentioning

confidence: 99%

LHC-friendly minimal freeze-in models

Bélanger

Desai

Goudelis

et al. 2019

J. High Energ. Phys.

136

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“…In this region of parameter space Majorons can form DM [27,29,[31][32][33][34][35][36], with a production mechanism that can be unrelated to the small decay couplings [10,27,93,94]. The defining signature of Majoron DM is a flux of neutrinos from DM decay with E ν m J /2 and a known flavor composition [10].…”

Section: B Comparison With Seesaw Observablesmentioning

confidence: 99%

Majoron at two loops

Heeck

Patel

2019

Phys. Rev. D

Self Cite

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We present singlet-Majoron couplings to Standard Model particles through two loops at leading order in the seesaw expansion, including couplings to gauge bosons as well as flavor-changing quark interactions. We discuss and compare the relevant phenomenological constraints on Majoron production as well as decaying Majoron dark matter. A comparison with standard seesaw observables in low-scale settings highlights the importance of searches for lepton-flavor-violating two-body decays → +Majoron in both the muon and tau sectors.

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“…For thermal warm dark matter (WDM) these observations place a lower limit on the DM mass in the range m DM 4.09 − 5.3 keV [66][67][68]. In two recent works [69,70] the Lyman-α limit for the case of freeze-in DM produced via two-body decays of a parent particle in thermal equilibrium with the plasma (which is precisely our scenario) has been estimated by comparing the suppression in the linear matter power spectrum from a thermal WDM scenario (with m DM given by the WDM Lyman-α limit, taken to be 4.65 keV [67,71]) to that of the freeze-in scenario. The Lyman-α bound in this case reads…”

Section: Constraints On Dark Matter Freeze-in From Cosmologymentioning

confidence: 99%

“…(3.4)), g i are the number of degrees of freedom of the parent particle A i , the parameter ∆ ij yields the mass splitting between the parent particle and the visible decay product in each channel (e.g. ∆ ij = 1 − m 2 Z /m 2 2 for the decay χ 2 → Zχ 1 ) and η 1.9 [70]. Assuming that freeze-in DM saturates the observed DM relic density, Figure 5 (right) shows the Lyman-α bound on m 1 in the present scenario.…”

Section: Constraints On Dark Matter Freeze-in From Cosmologymentioning

confidence: 99%

Probing dark matter freeze-in with long-lived particle signatures: MATHUSLA, HL-LHC and FCC-hh

Tunney

Zaldívar

2020

J. High Energ. Phys.

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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-α 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.1 The inverse processes are absent due to the small DM abundance w.r.t. equilibrium densities and to the feeble coupling between DM and the thermal bath.2 This is commonly known as infrared freeze-in. For other possibilities, see e.g. [20,21].3 See e.g. [22], although see [17,23,24] for recent phenomenological probes of freeze-in through a portal.

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Cold light dark matter in extended seesaw models

Cited by 46 publications

References 95 publications

LHC-friendly minimal freeze-in models

LHC-friendly minimal freeze-in models

Majoron at two loops

Probing dark matter freeze-in with long-lived particle signatures: MATHUSLA, HL-LHC and FCC-hh

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