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We calculate the strength of the electroweak phase transition in a supersymmetric model with four chiral generations. The additional chiral fermions (and scalar partners) lower the critical temperature and thus strengthen the first-order…

High Energy Physics - Phenomenology · Physics 2008-11-26 Ricky Fok , Graham D. Kribs

We systematically investigate theoretical uncertainties in perturbative analyses of first-order electroweak phase transitions (EWPT). Utilizing the Standard Model Effective Field Theory (SMEFT) framework, we quantify the gauge dependence,…

High Energy Physics - Phenomenology · Physics 2025-03-26 Yongzhao Zhu , Jie Liu , Renhui Qin , Ligong Bian

A possible solution to the observed baryon asymmetry in the universe is described, based on the physics of the standard model of electroweak interactions. At temperatures high enough electroweak physics provides violation of baryon number,…

High Energy Physics - Phenomenology · Physics 2007-05-23 Nicholas Petropoulos

A first order electroweak phase transition probes physics beyond the Standard Model on multiple frontiers and therefore is of immense interest for theoretical exploration. We conduct a model-independent study of the effects of relevant…

High Energy Physics - Phenomenology · Physics 2024-08-20 Upalaparna Banerjee , Sabyasachi Chakraborty , Suraj Prakash , Shakeel Ur Rahaman

The dynamics of phase transitions (PT) in quantum field theories at finite temperature is most accurately described within the framework of dimensional reduction. In this framework, thermodynamic quantities are computed within the…

High Energy Physics - Phenomenology · Physics 2024-10-11 Mikael Chala , Juan Carlos Criado , Luis Gil , Javier López Miras

We show that two-loop corrections to the finite temperature effective potential in the MSSM can have a dramatic effect on the strength of the electroweak phase transition, making it more strongly first order. The change in the order…

High Energy Physics - Phenomenology · Physics 2009-10-28 J. R. Espinosa

We present the first end-to-end nonperturbative analysis of the gravitational wave power spectrum from a thermal first-order electroweak phase transition (EWPT), using the framework of dimensionally reduced effective field theory and…

High Energy Physics - Phenomenology · Physics 2019-12-18 Oliver Gould , Jonathan Kozaczuk , Lauri Niemi , Michael J. Ramsey-Musolf , Tuomas V. I. Tenkanen , David J. Weir

We study the electroweak phase transition in the alignment limit of the CP-conserving two-Higgs-doublet model (2HDM) of Type I and Type II. The effective potential is evaluated at one-loop, where the thermal potential includes Daisy…

High Energy Physics - Phenomenology · Physics 2018-07-04 Jérémy Bernon , Ligong Bian , Yun Jiang

Standard theories of electroweak interactions are based on the concept of a gauge symmetry broken by the Higgs mechanism. If they are placed in an environment with a sufficiently high temperature, the symmetry gets restored. It turns out…

High Energy Physics - Phenomenology · Physics 2017-08-23 M. Laine

We investigate the evolution of the electroweak phase transition, using a one-Higgs effective potential that can be regarded as an approximation for the Minimal Supersymmetric Standard Model. The phase transition occurs in a small interval…

High Energy Physics - Phenomenology · Physics 2009-10-31 Ariel Megevand

The basic tool for the study of the electroweak phase transition is $V_{eff} (\phi,T)$, the one-loop finite-temperature effective potential, improved by all-loop resummations of the most important infrared contributions. In this paper we…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. R. Espinosa , M. Quirós , F. Zwirner

Due to the infrared problem of high-temperature field theory, a robust study of the electroweak phase transition (EWPT) requires use of non-perturbative methods. We apply the method of high-temperature dimensional reduction to the two Higgs…

High Energy Physics - Phenomenology · Physics 2019-02-19 Tyler Gorda , Andreas Helset , Lauri Niemi , Tuomas V. I. Tenkanen , David J. Weir

New field content beyond that of the Standard Model of particle physics can alter the thermal history of electroweak symmetry breaking in the early universe. In particular, the symmetry breaking may have occurred through a sequence of…

High Energy Physics - Phenomenology · Physics 2021-05-12 Lauri Niemi , Michael J. Ramsey-Musolf , Tuomas V. I. Tenkanen , David J. Weir

It is well known that the electroweak phase transition (EWPhT) in extensions of the Standard Model with one real scalar singlet can be first-order for realistic values of the Higgs mass. We revisit this scenario with the most general…

High Energy Physics - Phenomenology · Physics 2015-05-28 Jose R. Espinosa , Thomas Konstandin , Francesco Riva

We investigate electroweak baryogenesis within the framework of the Standard Model Effective Field Theory. The Standard Model Lagrangian is supplemented by dimension-six operators that facilitate a strong first-order electroweak phase…

High Energy Physics - Phenomenology · Physics 2018-02-14 Jordy de Vries , Marieke Postma , Jorinde van de Vis , Graham White

Phase transitions induced by high temperatures and strong magnetic fields are investigated in the Standard model. The consistent effective potential including the one-loop and ring diagram contributions is calculated and investigated for…

High Energy Physics - Phenomenology · Physics 2007-05-23 V. Skalozub , M. Bordag

We study the electroweak phase transition dynamics with a three-dimensional standard model effective field theory under a gauge-invariant approach. We observe that, at the two-loop level, the phase transition parameters obtained with the…

High Energy Physics - Phenomenology · Physics 2024-08-20 Renhui Qin , Ligong Bian

The electroweak phase transition in the magnetic and hypermagnetic fields is studied in the Standard Model on the base of investigation of symmetry behaviour within the consistent effective potential of the scalar and magnetic fields at…

High Energy Physics - Theory · Physics 2007-05-23 V. Skalozub , V. Demchik

In many extensions of the Standard Model, finite temperature computations are complicated by a hierarchy of zero temperature mass scales, in addition to the usual thermal mass scales. We extend the standard thermal resummations to such a…

High Energy Physics - Phenomenology · Physics 2009-10-31 M. Laine , M. Losada

A first-order Electroweak Phase Transition (EWPT) could explain the observed baryon-antibaryon asymmetry and its dynamics could yield a detectable gravitational wave signature, while the underlying physics would be within the reach of…

High Energy Physics - Phenomenology · Physics 2021-10-20 José Eliel Camargo-Molina , Rikard Enberg , Johan Löfgren