Relaxation of Higgs mass and cosmological constant with four-form fluxes and reheating
Sign Up to like & getrecommendations! Published in 2020 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2020)045
Abstract: We consider the most general effective action for the four-form fluxes in the Standard Model coupled to gravity. The Higgs mass parameter can be relaxed to a correct value due to the four-form coupling to… read more here.
Keywords: form; relaxation; form fluxes; cosmological constant ... See more keywords
The cosmological constant and the electroweak scale
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2019)212
Abstract: Abstract String theory has no parameter except the string scale, so a dynamically compactified solution to 4 dimensional spacetime should determine both the Planck scale and the cosmological constant Λ. In the racetrack Kähler uplift… read more here.
Keywords: electroweak scale; scale cosmological; cosmological constant; constant electroweak ... See more keywords
Large D gravity and charged membrane dynamics with nonzero cosmological constant
Sign Up to like & getrecommendations! Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2018)034
Abstract: A bstractIn this paper, we have found a class of dynamical charged ‘black-hole’ solutions to Einstein-Maxwell system with a non-zero cosmological constant in a large number of spacetime dimensions. We have solved up to the… read more here.
Keywords: cosmological constant; constant large; large gravity; charged membrane ... See more keywords
The Cosmological Constant From Planckian Fluctuations and the Averaging Procedure
Sign Up to like & getrecommendations! Published in 2019 at "Foundations of Physics"
DOI: 10.1007/s10701-019-00308-5
Abstract: In this paper I continue the investigation in \cite{1,1b} concerning my proposal on the nature of the cosmological constant. In particular, I study both mathematically and physically the quantum Planckian context and I provide, in… read more here.
Keywords: cosmological constant; fluctuations averaging; averaging procedure; constant planckian ... See more keywords
Ricci Flow Approach to the Cosmological Constant Problem
Sign Up to like & getrecommendations! Published in 2019 at "Foundations of Physics"
DOI: 10.1007/s10701-021-00405-4
Abstract: In order to resolve the cosmological constant problem, the notion of reference frame is re-examined at the quantum level. By using a quantum non-linear sigma model (Q-NLSM), a theory of quantum spacetime reference frame is… read more here.
Keywords: ricci flow; cosmological constant; geometry; constant problem ... See more keywords
Non-singular space-times with a negative cosmological constant: II. Static solutions of the Einstein–Maxwell equations
Sign Up to like & getrecommendations! Published in 2017 at "Letters in Mathematical Physics"
DOI: 10.1007/s11005-017-0955-x
Abstract: We construct infinite-dimensional families of non-singular static space-times, solutions of the vacuum Einstein–Maxwell equations with a negative cosmological constant. The families include an infinite-dimensional family of solutions with the usual AdS conformal structure at conformal… read more here.
Keywords: cosmological constant; negative cosmological; einstein maxwell; maxwell equations ... See more keywords
Low redshift constraints on scale-covariant models
Sign Up to like & getrecommendations! Published in 2022 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2022.100964
Abstract: The search for a physical model which explains the observed recent acceleration of the universe is a compelling task of modern fundamental cosmology. Recently Fernandes et al. presented low redshift observational constraints on a scale… read more here.
Keywords: constraints scale; redshift constraints; cosmological constant; low redshift ... See more keywords
On cosmological constant of generalized Robertson-Walker space-times
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Mathematical Physics"
DOI: 10.1063/1.4983134
Abstract: We classify (m + n)D warped product spaces (M¯,g¯) satisfying Einstein’s equation G¯=−Λ¯g¯. We show that the warping function f can determine not only the cosmological constant Λ¯ but also the cosmological constant Λ appearing… read more here.
Keywords: cosmological constant; generalized robertson; walker space; robertson walker ... See more keywords
Bianchi I solutions of the Einstein-Boltzmann system with a positive cosmological constant
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Mathematical Physics"
DOI: 10.1063/1.4985935
Abstract: In this paper, we study the future global existence and late-time behaviour of the Einstein-Boltzmann system with Bianchi I symmetry and a positive cosmological constant Λ>0. For the Boltzmann equation, we consider the scattering kernel… read more here.
Keywords: bianchi solutions; cosmological constant; positive cosmological; boltzmann system ... See more keywords
Evolving Black Holes in Inflation
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DOI: 10.1088/1361-6382/aacec2
Abstract: We present an analytic, perturbative solution to the Einstein equations with a scalar field that describes dynamical black holes in a slow-roll inflationary cosmology. We show that the metric evolves quasi-statically through a sequence of… read more here.
Keywords: cosmological constant; black holes; cosmology; holes inflation ... See more keywords
Bouncing unitary cosmology I. Mini-superspace general solution
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DOI: 10.1088/1361-6382/aaf823
Abstract: We offer a new proposal for cosmic singularity resolution based upon a quantum cosmology with a unitary bounce. This proposal is illustrated via a novel quantization of a mini-superspace model in which there can be… read more here.
Keywords: cosmological constant; mini superspace; cosmology; bounce ... See more keywords