Joint statistics of cosmological constant and SUSY breaking in flux vacua with nilpotent Goldstino

Cicoli, Michele; Licheri, Matteo; Maharana, Anshuman; Singh, Kajal; Sinha, Kuver

doi:10.1007/jhep01(2023)013

Cited by 4 publications

(3 citation statements)

References 108 publications

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“…This case is particularly interesting since it can lead to the correct abundance of super-heavy neutralinos with mass of order m DM ∼ M soft ∼ m 3/2 ∼ 10 10−11 GeV thanks to two effects: (i) the initial production of neutralinos from the inflaton decay is tiny since the inflaton decays mainly into hidden sector degrees of freedom due to the geometric separation between τ inf and τ SM ; (ii) the decay of the volume mode dilutes the neutralinos produced from the inflaton decay without being able to reproduce them since m τ big < m DM . Such a super-heavy dark matter candidate is particularly interesting since statistical studies of the supersymmetry breaking scale in the landscape seem to prefer higher scales of supersymmetry breaking [789,790] (see however the recent results obtained in [791]). Moreover, if exponentially suppressed R-parity violating couplings are induced by non-perturbative effects, the decay of a dark matter particle with m DM ∼ 10 10−11 GeV could explain the recent observation of ultra-high-energy neutrinos by ANITA [792,793].…”

Section: Dark Matter and The Interplay Between Inflation And Post-inf...mentioning

confidence: 99%

“…A recent development in this direction is the incorporation of Kähler moduli stabilisation, thereby ensuring that the sampling is only over the minima of the moduli potential (see e.g. [790,791] and references therein). Constructions with as many as 10 272 000 vacua have been proposed [834], while F-theory models of dark energy have been proposed in [835,836].…”

Section: The Anthropic Principle and The String Theory Landscapementioning

confidence: 99%

“…It is not yet clear how to use this framework to make predictions. Any statistical approach (see [133,829,790,776,791] and [837] for a pedagogical review), by searching for those properties which have probability ∼ O(1) in the landscape (see [838,839] for discussions for and against our typicality) or identifying distinct low-energy features that are strongly correlated, would require an understanding of the measure on the space of vacua. Such a measure would need to include consideration of the dynamical mechanism that populates the landscape, which may prefer some vacua over others.…”

Section: Open Questions On the Landscapementioning

confidence: 99%

See 2 more Smart Citations

String Cosmology: from the Early Universe to Today

Cicoli¹,

Conlon²,

Maharana³

et al. 2023

Preprint

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We review applications of string theory to cosmology, from primordial times to the present-day accelerated expansion. Starting with a brief overview of cosmology and string compactifications, we discuss in detail moduli stabilisation, inflation in string theory, the impact of string theory on post-inflationary dynamics (reheating, moduli domination, kination), dark energy (the cosmological constant from a string landscape and models of quintessence) and various alternative scenarios (string/brane gases, the pre big-bang scenario, rolling tachyons, ekpyrotic/cyclic cosmologies, bubbles of nothing, S-brane and holographic cosmologies). The state of the art in string constructions is described in each topic and, where relevant, connections to swampland conjectures are made. The possibilities for novel particles and excitations (axions, moduli, cosmic strings, branes, solitons, oscillons and boson stars) are emphasised. Implications for the physics of the CMB, gravitational waves, dark matter and dark radiation are discussed along with potential observational signatures.

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Section: Dark Matter and The Interplay Between Inflation And Post-inf...mentioning

confidence: 99%

Section: The Anthropic Principle and The String Theory Landscapementioning

confidence: 99%

Section: Open Questions On the Landscapementioning

confidence: 99%

See 1 more Smart Citation

String Cosmology: from the Early Universe to Today

Cicoli¹,

Conlon²,

Maharana³

et al. 2023

Preprint

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Phenomenology of superheavy decaying dark matter from string theory

Allahverdi,

Arina,

Chianese

et al. 2024

J. High Energ. Phys.

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We study the phenomenology of superheavy decaying dark matter with mass around 1010 GeV which can arise in the low-energy limit of string compactifications. Generic features of string theory setups (such as high scale supersymmetry breaking and epochs of early matter domination driven by string moduli) can accommodate superheavy dark matter with the correct relic abundance. In addition, stringy instantons induce tiny R-parity violating couplings which make dark matter unstable with a lifetime well above the age of the Universe. Adopting a model-independent approach, we compute the flux and spectrum of high-energy gamma rays and neutrinos from three-body decays of superheavy dark matter and constrain its mass-lifetime plane with current observations and future experiments. We show that these bounds have only a mild dependence on the exact nature of neutralino dark matter and its decay channels. Applying these constraints to an explicit string model sets an upper bound of $$ \mathcal{O} $$ O (0.1) on the string coupling, ensuring that the effective field theory is in the perturbative regime.

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Flux vacua in type IIB compactifications on orbifolds: their finiteness and minimal string coupling

Antoniadis,

Guillen,

Lacombe

2024

J. High Energ. Phys.

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We perform a detailed study of (supersymmetric) moduli stabilisation in type IIB toroidal orientifolds with fluxes. We provide strong evidence towards exhaustion of the finite number of inequivalent vacua for a given total 3-form flux charge N flux. We also find that the minimal value of the string coupling g s is given in terms of N flux and present strong evidence for the asymptotic relation g s, min ∼ $$ c/{N}_{\textrm{flux}}^{\alpha } $$ c / N flux α , with α = 1, 2, valid for not too small N flux, where c is an order 1 coefficient and α depends on the orbifold. Imposing tadpole cancellation, N flux is bounded from the number of orientifold O3-planes. Combined with the flux quantisation, this forbids orientifold vacua without anti-brane charge. On the other hand, the presence of negative D3-brane charge induced by magnetised D7-branes breaks supersymmetry and relaxes the bound, allowing significantly smaller values for g s .

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Joint statistics of cosmological constant and SUSY breaking in flux vacua with nilpotent Goldstino

Cited by 4 publications

References 108 publications

String Cosmology: from the Early Universe to Today

String Cosmology: from the Early Universe to Today

Phenomenology of superheavy decaying dark matter from string theory

Flux vacua in type IIB compactifications on orbifolds: their finiteness and minimal string coupling

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