Topic
Electroweak interaction
About: Electroweak interaction is a research topic. Over the lifetime, 16333 publications have been published within this topic receiving 468927 citations. The topic is also known as: electroweak force.
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TL;DR: In this article, the authors explore the consequences of placing the Standard Model gauge fields in the bulk of the recently proposed localized gravity model of Randall and Sundrum and find that the Kaluza-Klein excitations of these fields are necessarily strongly coupled and demonstrate that current precision electroweak data constrain the lowest states to lie above ≃23 TeV.
432 citations
TL;DR: In this paper, a CP-asymmetry is found in the reflection coefficients of quarks hitting the phase boundary created during the electroweak transition and a regular GIM behavior is found as intuitively expected.
Abstract: In CP arguments, we argue against a Standard Model explanation of the baryon asymmetry of the universe in the presence of a first order phase transition. A CP-asymmetry is found in the reflection coefficients of quarks hitting the phase boundary created during the electroweak transition. The problem is analyzed both in an academic zero temperature case and in the realistic finite temperature one. The building blocks are similar in both cases: Kobayashi-Maskawa CP-violation, CP-even phases in the reflection coefficients of quarks, and physical transitions due to fermion self-energies. In both cases an effect is present at order $\alpha_W^2 $ in rate. A regular GIM behavior is found as intuitively expected. In the finite temperature case, a crucial role is played by the damping rate of quasiparticles in a hot plasma, which is a relevant scale together with MW and the temperature. The effect is many orders of magnitude below what observation requires, and indicates that non-standard physics is indeed needed ...
430 citations
TL;DR: In this paper, the mass and the wave function of the radion were determined including the back reaction of the bulk stabilization field on the metric, giving a typical radion mass of the order of the weak scale.
Abstract: The dynamics of a stabilized radion in the Randall-Sundrum model with two branes is investigated, and the effects of the radion on electroweak precision observables are evaluated The radius is assumed to be stabilized using a bulk scalar field as suggested by Goldberger and Wise First the mass and the wave function of the radion is determined including the back reaction of the bulk stabilization field on the metric, giving a typical radion mass of the order of the weak scale This is demonstrated by a perturbative computation of the radion wave function A consequence of the background configuration for the scalar field is that after including the back reaction the Kaluza-Klein states of the bulk scalars couple directly to the standard model fields on the TeV brane Some cosmological implications are discussed, and in particular it is found that the shift in the radion at late times is in agreement with the four-dimensional effective theory result The effect of the radion on the oblique parameters is evaluated using an effective theory approach In the absence of a curvature-scalar Higgs mixing operator, these corrections are small and give a negative contribution to S In the presence of such a mixingmore » operator, however, the corrections can be sizable due to the modified Higgs and radion couplings« less
427 citations
TL;DR: In this paper, the authors review the phenomenology of models with flat, compactified extra dimensions where all of the Standard Model fields are allowed to propagate in the bulk, known as Universal Extra Dimensions (UED).
426 citations
TL;DR: In this paper, the anomalous baryon number nonconservation at high temperatures and in high energy collisions is reviewed and applications to electroweak baryogenesis are considered, and the current status of the problem of instanton-like processes at high energies is outlined.
Abstract: We review recent progress in the study of the anomalous baryon number non-conservation at high temperatures and in high energy collisions. Recent results on high temperature phase transitions are described, and applications to electroweak baryogenesis are considered. The current status of the problem of electroweak instanton-like processes at high energies is outlined. This paper is written on the occasion of Sakharov’s 75th anniversary and will appear in the memorial volume of Uspekhi (Usp. Fiz. Nauk, volume 166, No 5, May 1996).
424 citations