Asymptotic safety, string theory and the weak gravity conjecture

Alwis, S.P. de; Eichhorn, Astrid; Held, Aaron; Pawlowski, Jan M.; Schiffer, Marc; Versteegen, Fleur

doi:10.1016/j.physletb.2019.134991

Cited by 52 publications

(65 citation statements)

References 123 publications

(206 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quantum gravity is treated here as a fundamental non-perturbative QFT. In the case of a different embedding of the SM such as string theory, our results only hold if the asymptotically safe fixed point serves as an attractor of the RG flows [97].…”

Section: Discussion Of Uncertaintiesmentioning

confidence: 81%

Dark matter meets quantum gravity

Reichert

Smirnov

2020

Phys. Rev. D

View full text Add to dashboard Cite

We search for an extension of the Standard Model that contains a viable dark matter candidate and that can be embedded into a fundamental, asymptotically safe, quantum field theory with quantum gravity. Demanding asymptotic safety leads to boundary conditions for the non-gravitational couplings at the Planck scale. For a given dark matter model these translate into constraints on the mass of the dark matter candidate. We derive constraints on the dark matter mass and couplings in two minimal dark matter models: i) scalar dark matter coupled via the Higgs-portal in the B-L model; ii) fermionic dark matter in a U (1)X extension of the Standard Model, coupled via the new gauge boson. For scalar dark matter we find 56 GeV < MDM < 63 GeV, and for fermionic dark matter MDM ≤ 37 TeV. Within our framework, we identify three benchmark scenarios with distinct phenomenological consequences.

show abstract

Section: Discussion Of Uncertaintiesmentioning

confidence: 81%

Dark matter meets quantum gravity

Reichert

Smirnov

2020

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…The 4d stress-energy tensor is 48) and so, the variation of the matter part of the action (the last term in (3.47)) is 49) in terms of the four-dimensional stress-energy tensor T µν . Since…”

Section: Adiabatic Discharge: M 2 Qementioning

confidence: 99%

Festina lente:1 EFT constraints from charged black hole evaporation in de Sitter

Montero

Riet

Venken

2020

J. High Energ. Phys.

162

View full text Add to dashboard Cite

In the Swampland philosophy of constraining EFTs from black hole mechanics we study charged black hole evaporation in de Sitter space. We establish how the black hole mass and charge change over time due to both Hawking radiation and Schwinger pair production as a function of the masses and charges of the elementary particles in the theory. We find a lower bound on the mass of charged particles by demanding that large charged black holes evaporate back to empty de Sitter space, in accordance with the thermal picture of the de Sitter static patch. This bound is satisfied by the charged spectrum of the Standard Model. We discuss phenomenological implications for the cosmological hierarchy problem and inflation. Enforcing the thermal picture also leads to a heuristic remnant argument for the Weak Gravity Conjecture in de Sitter space, where the usual kinematic arguments do not work. We also comment on a possible relation between WGC and universal bounds on equilibration times. All in all, charged black holes in de Sitter should make haste to evaporate, but they should not rush it 2 .

show abstract

“…In view of the fact that the energy range associated with frustration of aymptotic freedom appears to lie well above the Planck mass (M P 10 19 GeV ) where gravitational effects must become important, one might question its physical relevance. However it may also be possible and would certainly be interesting to relate the behaviour of α S (M ) when M M P to models of quantum gravity constructed with appropriate running LSV parameters [28,29].…”

Section: Discussionmentioning

confidence: 99%

Lorentz symmetry violation in QCD and the frustration of asymptotic freedom

Drummond

2020

Phys. Rev. D

View full text Add to dashboard Cite

We study the effect of Lorentz symmetry violation (LSV) on the behaviour at high energy of SU(N) gauge theory with quarks in the fundamental representation. The approach is similar to that for QED treated in a previous paper. In contrast to QED, standard Lorentz invariant QCD is asymptotically free. Our aim is to explore the structure of the renormalisation group at high energy and hence weak coupling without requiring the Lorentz symmetry breaking to be small. The simplest type of LSV leaves the theory invariant under a subgroup of the Lorentz group that preserves a (time-like) 4-vector. We examine this case in detail and find that asymptotic freedom is frustrated. That is, at sufficiently high energy the running coupling constant attains a minimum value before increasing again, while the LSV parameter increases without bound. *

show abstract

Asymptotic safety, string theory and the weak gravity conjecture

Cited by 52 publications

References 123 publications

Dark matter meets quantum gravity

Dark matter meets quantum gravity

Festina lente:1 EFT constraints from charged black hole evaporation in de Sitter

Lorentz symmetry violation in QCD and the frustration of asymptotic freedom

Contact Info

Product

Resources

About