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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 first-order electroweak phase transitions in the real-singlet extended Standard Model, for which non-zero mixing between the Higgs and the singlet can efficiently strengthen the transitions. We perform large-scale parameter space…

High Energy Physics - Phenomenology · Physics 2024-08-29 Lauri Niemi , Tuomas V. I. Tenkanen

The electroweak phase transition is investigated by means of the perturbatively calculated high temperature effective potential. An analytic result to order $g^4,\lambda^2$ is presented for the Abelian Higgs model, the SU(2)-Higgs model and…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Hebecker

The Higgs potential of the standard model with an additional real Higgs singlet is studied in order to examine if it may allow the strongly first order electroweak phase transition. It is found that there are parameter values for which this…

High Energy Physics - Phenomenology · Physics 2011-08-23 S. W. Ham , Y. S. Jeong , S. K. Oh

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

We investigate the strongly first-order electroweak phase transition using an effective field theoretical approach. The standard effective field theory with finite number truncation of higher dimensional operators fails in the typical…

High Energy Physics - Phenomenology · Physics 2022-06-22 Shinya Kanemura , Ryo Nagai , Masanori Tanaka

In an extension of the Standard Model with a scalar color octet, the possibility of the strongly first-order electroweak phase transition is studied, by examining the finite-temperature effective Higgs potential at the one-loop level. It is…

High Energy Physics - Phenomenology · Physics 2010-04-14 S. W. Ham , Seong-a Shim , S. K. Oh

We present a detailed analysis of the phase transition in the standard model at finite temperature. Using an improved perturbation theory, where plasma masses are determined from a set of one-loop gap equations, we evaluate the effective…

High Energy Physics - Phenomenology · Physics 2016-08-14 W. Buchmüller , Z. Fodor T. Helbig , D. Walliser

We study twin Higgs models at non-zero temperature and discuss cosmological phase transitions as well as their implications on electroweak baryogenesis and gravitational waves. It is shown that the expectation value of the Higgs field at…

High Energy Physics - Phenomenology · Physics 2018-12-27 Kohei Fujikura , Kohei Kamada , Yuichiro Nakai , Masahide Yamaguchi

We compute the complete one-loop finite temperature effective potential for electroweak symmetry breaking in the Standard Model with a Higgs potential supplemented by higher dimensional operators as generated for instance in composite Higgs…

High Energy Physics - Phenomenology · Physics 2008-11-26 C. Delaunay , C. Grojean , J. D. Wells

We examine the nature of electroweak Baryogenesis when the Higgs boson's properties are modified by the effects of new physics. We utilize the effective potential to one loop (ring improving the finite temperature perturbative expansion)…

High Energy Physics - Phenomenology · Physics 2009-02-25 Benjamin Grinstein , Michael Trott

The electroweak phase transition in the Two-Higgs-Doublet Model is investigated. The Gibbs potential at finite temperature is computed with regard for the one-loop plus ring diagram contributions. The strong first-order phase transition…

High Energy Physics - Phenomenology · Physics 2011-07-12 Andrey Kozhushko , Vladimir Skalozub

Recent progress in the theory of the electroweak phase transition is discussed. For the Higgs boson mass smaller than the masses of W and Z bosons, the phase transition is of the first order. However, its strength is approximately 2/3 times…

High Energy Physics - Phenomenology · Physics 2007-05-23 Andrei Linde

We investigate the one-loop effect of new charged scalar bosons on the Higgs potential at finite temperatures in the supersymmetric standard model with four Higgs doublet chiral superfields as well as a pair of charged singlet chiral…

High Energy Physics - Phenomenology · Physics 2015-05-30 Shinya Kanemura , Eibun Senaha , Tetsuo Shindou

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

We study the possibility of a first-order electroweak phase transition (EWPT) due to a dimension-six operator in the effective Higgs potential. In contrast with previous attempts to make the EWPT strongly first-order as required by…

High Energy Physics - Phenomenology · Physics 2009-11-10 C. Grojean , G. Servant , J. Wells

The electroweak phase transition is studied at finite temperature. The effective action is given to higher orders, including wave function correction factors and the full $g^4,\lambda^2$ effective potential. An upper bound for the Higgs…

High Energy Physics - Phenomenology · Physics 2016-09-01 Z. FODOR

The effective potential of electroweak theory with two massless Higgs doublets at finite temperature is studied. We investigate phase structure and critical temperature in this model by numerical analysis without high-temperature expansion.…

High Energy Physics - Phenomenology · Physics 2017-02-01 K. Funakubo , A. Kakuto , K. Takenaga

We analyze the electroweak phase transition at finite temperature in a model of gauge-Higgs unification where the fermion mass hierarchy including top quark mass, a viable electroweak symmetry breaking and an observed Higgs mass are…

High Energy Physics - Phenomenology · Physics 2020-02-26 Yuki Adachi , Nobuhito Maru

The possibility of a strongly first-order electroweak phase transition by means of a dimension-six Higgs operator in the Higgs potential of the standard model is studied at finite temperature at the one-loop level. Exact calculation of the…

High Energy Physics - Phenomenology · Physics 2009-11-10 S. W. Ham , S. K. Oh
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