80 citations · 459 across the 20 of their papers we have counts for
20 papers · 1 filter
Scalar damping in cosmological phase transitions
Andreas Ekstedt, Thomas Konstandin, Jorinde van de Vis
We outline how to calculate the scalar damping term during a cosmological phase transition from kinetic theory. We determine the scalar damping rate from top quarks and weak gauge…
Bubble-wall speed with loop corrections
Andrii Dashko, Andreas Ekstedt
In this paper, we investigate the dynamics of the nucleating scalar field during the first-order phase transitions by incorporating one-loop corrections of classical fluctuations.…
How fast does the WallGo? A package for computing wall velocities in first-order phase transitions
Andreas Ekstedt, Oliver Gould, Joonas Hirvonen +4
WallGo is an open source software for the computation of the bubble wall velocity in first-order cosmological phase transitions. It also computes the energy budget available for th…
Cosmological phase transitions at three loops: the final verdict on perturbation theory
Andreas Ekstedt, Philipp Schicho, Tuomas V. I. Tenkanen
We complete the perturbative program for equilibrium thermodynamics of cosmological first-order phase transitions by determining the finite-temperature effective potential of gauge…
BubbleDet: A Python package to compute functional determinants for bubble nucleation
Andreas Ekstedt, Oliver Gould, Joonas Hirvonen
We present a Python package, BubbleDet, for computing one-loop functional determinants around spherically symmetric background fields. This gives the next-to-leading order correcti…
Propagation of gauge fields in hot and dense plasmas at higher orders
Andreas Ekstedt
Thermal field theory is indispensable for describing hot and dense systems. Yet perturbative calculations are often stymied by a host of energy scales, and tend to converge slowly.…
Two-loop hard thermal loops for any model
Andreas Ekstedt
Hard thermal loops describe how soft gauge fields are screened and damped in hot plasmas. As such they are used to calculate transport coefficients, Sphaleron rates, equations of s…
DRalgo: a package for effective field theory approach for thermal phase transitions
Andreas Ekstedt, Philipp Schicho, Tuomas V. I. Tenkanen
DRalgo is an algorithmic implementation that constructs an effective, dimensionally reduced, high-temperature field theory for generic models. The corresponding Mathematica package…
Convergence of the nucleation rate for first-order phase transitions
Andreas Ekstedt
This paper investigates the importance of radiative corrections for first-order phase transitions, with particular focus on the bubble-nucleation rate. All calculations are done wi…
Radiative first-order phase transitions to next-to-next-to-leading order
Andreas Ekstedt, Oliver Gould, Johan Löfgren
We develop new perturbative tools to accurately study radiatively-induced first-order phase transitions. Previous perturbative methods have suffered internal inconsistencies and be…
Bubble Nucleation to All Orders
Andreas Ekstedt
This paper extends classical results by Langer and Kramers and combines them with modern methods from high-temperature field theory. Assuming Langevin dynamics, the end-product is…
Higher-Order Corrections to the Bubble-Nucleation Rate at Finite Temperature
Andreas Ekstedt
In this paper I discuss how to consistently incorporate higher-order corrections to the bubble-nucleation rate at finite temperature. Doing so I examine the merits of different app…
A natural mechanism for approximate Higgs alignment in the 2HDM
Patrick Draper, Andreas Ekstedt, Howard E. Haber
The 2HDM possesses a neutral scalar interaction eigenstate whose tree-level properties coincide with the Standard Model (SM) Higgs boson. In light of the LHC Higgs data which sugge…
Flavorgenesis
Andreas Ekstedt, Renato M. Fonseca, Michal Malinský
We present a model where all fermions are contained in a single irreducible representation of an SU(19) gauge symmetry group. If there is only one scalar field, Yukawa interactions…
A Critical Look at the Electroweak Phase Transition
Andreas Ekstedt, Johan Löfgren
The electroweak phase transition broke the electroweak symmetry. Perturbative methods used to calculate observables related to this phase transition suffer from severe problems suc…
On the relationship between gauge dependence and IR divergences in the -expansion of the effective potential
Andreas Ekstedt, Johan Löfgren
Perturbative calculations of the effective potential evaluated at a broken minimum, , are plagued by difficulties. It is hard to get a finite and gauge invariant…
Nucleon parton distributions from hadronic quantum fluctuations
Andreas Ekstedt, Hazhar Ghaderi, Gunnar Ingelman +1
A physical model is presented for the non-perturbative parton distributions in the nucleon. This is based on quantum fluctuations of the nucleon into baryon-meson pairs convoluted…
Minimal anomalous theories and collider phenomenology
Andreas Ekstedt, Rikard Enberg, Gunnar Ingelman +2
We study the collider phenomenology of a neutral gauge boson arising in minimal but anomalous extensions of the Standard Model (SM). To retain gauge invariance…
Hard color singlet BFKL exchange and gaps between jets at the LHC
Andreas Ekstedt, Rikard Enberg, Gunnar Ingelman
We explore the perturbative QCD dynamics of hard parton-parton scattering through the exchange of a color singlet two-gluon ladder as described by the BFKL equation, resulting in a…
Constraining minimal anomaly free extensions of the Standard Model
Andreas Ekstedt, Rikard Enberg, Gunnar Ingelman +2
We consider a class of minimal anomaly free extensions of the Standard Model with three generations of right-handed neutrinos and a complex scalar. Using electrowea…