Superheavy dark matter from string theory

Allahverdi, Rouzbeh; Bröckel, Igor; Cicoli, Michele; Osiński, Jacek K.

doi:10.1007/jhep02(2021)026

Cited by 16 publications

(17 citation statements)

References 79 publications

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“…In the absence of sequestering effects for orientifolded quivers [38], soft terms JHEP08(2021)109 are of order the gravitino mass which can be either around 10 10 GeV or at the TeV-scale, depending on the tuning allowed on the flux superpotential. Interestingly, if the gravitino mass is at intermediate scales, our models have all the required features to provide a viable description of the cosmological evolution of our universe, from inflation [39] to the post-reheating epoch [40,41] involving non-thermal dark matter [42], Affleck-Dine baryogenesis [43] and axionic dark radiation [44][45][46].…”

Section: Jhep08(2021)109mentioning

confidence: 99%

“…When τ b decays it dilutes everything that has been produced before. This dilution mechanism can be very useful to have viable super-heavy dark matter scenarios [42] and Affleck-Dine baryogenesis [43] that would otherwise lead to an overproduction of either WIMP dark matter or matterantimatter asymmetry. Moreover, the decay of the volume mode tends to produce axionic dark radiation [44][45][46] which can be within observational constraints and can represent an interesting experimental signature of these constructions.…”

Section: Cosmologymentioning

confidence: 99%

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The Standard Model quiver in de Sitter string compactifications

Cicoli

García-Etxebarria

Quevedo³

et al. 2021

J. High Energ. Phys.

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We argue that the Standard Model quiver can be embedded into compact Calabi-Yau geometries through orientifolded D3-branes at del Pezzo singularities dPn with n ≥ 5 in a framework including moduli stabilisation. To illustrate our approach, we explicitly construct a local dP5 model via a combination of Higgsing and orientifolding. This procedure reduces the original dP5 quiver gauge theory to the Left-Right symmetric model with three families of quarks and leptons as well as a Higgs sector to further break the symmetries to the Standard Model gauge group. We embed this local model in a globally consistent Calabi-Yau flux compactification with tadpole and Freed-Witten anomaly cancellations. The model features closed string moduli stabilisation with a de Sitter minimum from T-branes, supersymmetry broken by the Kähler moduli, and the MSSM as the low energy spectrum. We further discuss phenomenological and cosmological implications of this construction.

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Section: Jhep08(2021)109mentioning

confidence: 99%

Section: Cosmologymentioning

confidence: 99%

The Standard Model quiver in de Sitter string compactifications

Cicoli

García-Etxebarria

Quevedo³

et al. 2021

J. High Energ. Phys.

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“…1. While the universe remains radiation dominated at very early epochs, an intermediate matter domination phase MD1 arises when N 1 , after its freeze-out, behaves like non-relativistic matter [24]. The intermediate N 1 dominated phase is clearly visible in Fig.…”

Section: Miracle-less Wimp Dark Mattermentioning

confidence: 91%

Probing Miracle-less WIMP Dark Matter via Gravitational Waves Spectral Shapes

Borah,

Das,

Saha

et al. 2022

Preprint

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We propose a novel probe of weakly interacting massive particle (WIMP) dark matter candidates of a wide mass range which fall short of the required annihilation rates to satisfy correct thermal relic abundance, dubbed as Miracle-less WIMP. If the dark matter (DM) interactions are mediated by an Abelian gauge boson like B-L, its annihilation rates typically remain smaller than the WIMP ballpark for very high scale B-L symmetry breaking. The thermally overproduced WIMP DM is brought within correct relic limits via late entropy dilution from one of the three right handed neutrinos (RHN) present for keeping the model anomaly free and generate light neutrino masses. Such late entropy injection leads to peculiar spectral shapes of gravitational waves (GW) generated by cosmic strings, formed as a result of B-L symmetry breaking. We find interesting correlation between DM mass and turning frequency of the GW spectrum with the latter being within reach of future experiments. The two other RHNs play major role in generating light neutrino masses and baryon asymmetry of the universe via leptogenesis. Successful leptogenesis with Miracle-less WIMP together restrict the turning frequencies to lie only within the sensitivity limits of future GW experiments like Cosmic Explorer and Einstein Telescope.

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“…( 18), obtaining the observed relic abundance requires a very small value of n DM /s, which could pose a challenge to any production mechanism of superheavy DM. However, entropy release by N decay can dilute the existing DM density by a few orders of magnitude thereby enlarging the parameter space of any model with extremely heavy DM candidates (for example, see [41]).…”

Section: Other Considerationsmentioning

confidence: 99%

Early Matter Domination from Long-Lived Particles in the Visible Sector

Allahverdi,

Osiński

2021

Preprint

Self Cite

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We show that a nonstandard cosmological history with a period of early matter domination driven by a sub-TeV visible-sector particle can arise rather naturally. This scenario involves a long-lived standard model singlet that acquires a thermal abundance at high temperatures from decays and inverse decays of a parent particle with SM charge(s), and subsequently dominates the energy density of the Universe as a frozen species. Entropy generation at the end of early matter domination dilutes the abundance of dangerous relics (such as gravitinos) by a factor as large as 10 4 . The scenario can accommodate the correct dark matter relic abundance for cases with σannv f ≶ 3 × 10 −26 cm 3 s −1 . More importantly, the allowed parameter space can be directly probed by proposed searches for neutral long-lived particles at the energy frontier, allowing us to use particle physics experiments to reconstruct the cosmological history just prior to big bang nucleosynthesis. I. INTRODUCTIONDespite various lines of evidence for the existence of dark matter (DM) [1], its identity remains a major problem at the interface of cosmology and particle physics. The relic abundance of DM depends on its particle physics origin as well as the thermal history of the early Universe. Thermal freeze-out in a radiation-dominated (RD) Universe can explain the DM content of the Universe if the thermally averaged annihilation rate takes the nominal value σ ann v f = 3 × 10 −26 cm 3 s −1 at the time of freeze-out, when T = T f . However, the correct relic abundance can also be obtained for much larger or smaller values of σ ann v f if the Universe is not in a RD phase at the time of freeze-out [2]. An epoch of early matter domination (EMD), which is a generic feature of early Universe models from string theory constructions [3], provides an important such example. EMD is driven by a matter-like species that comes to dominate the energy density of the Universe and decays to establish RD prior to big bang nucleosynthesis (BBN). Various production mechanisms during EMD can yield the correct DM abundance for both σ ann v f ≶ 3 × 10 −26 cm 3 s −1 .A component whose equation of state is the same as matter can lead to an EMD phase in the postinflationary Universe if it constitutes a sizeable fraction of the total energy density and is sufficiently long lived. In the context of string theory, this can arise from coherent oscillations of string moduli that are displaced from the minimum of their potential during inflation. Modulus fields have long lifetimes due to their gravitationally suppressed couplings to other fields. An EMD era may also be driven by long-lived nonrelativistic quanta that are produced in the postinflationary Universe and dominate the energy density before decaying. This can happen, for example, in models that involve hidden sectors [5][6][7][8]. Scenarios with EMD have interesting observable predictions that can be tested via cosmological observations and DM indirect detection searches [9][10][11][12][13]. A natural question that arises i...

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Superheavy dark matter from string theory

Cited by 16 publications

References 79 publications

The Standard Model quiver in de Sitter string compactifications

The Standard Model quiver in de Sitter string compactifications

Probing Miracle-less WIMP Dark Matter via Gravitational Waves Spectral Shapes

Early Matter Domination from Long-Lived Particles in the Visible Sector

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