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: The charge transport mechanism of electroweak baryogenesis in a realistic two-Higgs-doublet model is quantitatively study and concludes that it is marginally strong enough to produce the observed baryon asymmetry of the universe.
Abstract: We quantitatively study the charge transport mechanism of electroweak baryogenesis in a realistic two-Higgs-doublet model, comparing the contributions from quarks and leptons reflecting from electroweak do-main walls, and comparing the exact profile of the $\mathrm{CP}$-violating phase with a commonly used ansatz. We note that the phenomenon of spontaneous $\mathrm{CP}$ violation at high temperature can occur in this model, even when there is no $\mathrm{CP}$ violation at zero temperature. We include all known effects which are likely to influence the baryon production rate, including strong sphalerons, the nontrivial dispersion relations of the quasiparticles in the plasma, and Debye screening of gauged charges. We confirm the claim of Joyce, Prokopec, and Turok that the reflection of $\ensuremath{\tau}$ leptons from the wall gives the dominant effect. We conclude that this mechanism is at best marginally capable of producing the observed baryon asymmetry of the universe, and we discuss some ways in which it might be enhanced.
161 citations
TL;DR: In this paper, the authors present a calculation of the full next-to-leading order QCD corrections to the scattering process p p → t t t ¯ Z, which is used to measure the t t¯ Z electroweak couplings at the Large Hadron Collider.
160 citations
TL;DR: In this article, the authors compute the Higgs mass and demonstrate that the mass is naturally in a range that varies between values close to the LEP experimental limit and about 160 GeV.
Abstract: of large corrections to the T parameter and the coupling of the Z to the bottom quark. We demonstrate that electroweak symmetry breaking may be realized, with proper generation of the top and bottom quark masses for the same region of bulk mass parameters that lead to good agreement with precision electroweak data in the presence of a light Higgs. We compute the Higgs mass and demonstrate that for the range of parameters for which the Higgs boson has Standard Model-like properties, the Higgs mass is naturally in a range that varies between values close to the LEP experimental limit and about 160 GeV. This mass range may be probed at the Tevatron and at the LHC. We analyze the KK spectrum and briey discuss the phenomenology of the light resonances arising in our model.
160 citations
TL;DR: A consistent picture of the {ital q{bar q}} system emerges which should allow a reliable treatment of electroweak phenomena in the heavy-meson sector also.
Abstract: We investigate the predictive power of a relativistic constituent-quark model of electroweak properties of pseudoscalar and vector mesons in the {ital u}-, {ital d}-, {ital s}-quark sector. The rates for radiative and weak decay processes and electromagnetic form factors for charged and neutral pseudoscalar mesons are calculated and compared with experiment. This analysis determines the values of the angles for {eta}-{eta}{prime} and {omega}-{phi} mixing, and also the Kobayashi-Maskawa matrix element {ital V}{sub {ital u}{ital s}}. A consistent picture of the {ital q{bar q}} system emerges which should allow a reliable treatment of electroweak phenomena in the heavy-meson sector also.
160 citations
TL;DR: In this article, the authors considered the minimal supersymmetric standard model with universal boundary conditions and "asymptotic" Yukawa unification, and calculated the relic abundance of the light-est super-particle (bino) by including its coannihilations with the next-to-lightest superpartner (lightest stau).
Abstract: The minimal supersymmetric standard model with universal boundary conditions and "asymptotic" Yukawa unification is considered. The full one-loop effective potential for radiative electroweak symmetry breaking as well as the one-loop corrections to the charged Higgs boson, b-quark and tau lepton masses are included. The CP-even Higgs boson masses are corrected to two-loops. The relic abundance of the lightest supersymmetric particle (bino) is calculated by including its coannihilations with the next-to-lightest supersymmetric particle (lightest stau) consistently with Yukawa unification. The branching ratio of b --> s gamma is evaluated by incorporating all the applicable next-to-leading order QCD corrections. The bino-stau coannihilations reduce the bino relic abundance below the upper bound from cold dark matter considerations in a sizable fraction of the parameter space allowed by b --> s gamma for mu>0. Thus, the mu>0 case, which also predicts an acceptable b-quark mass, is perfectly compatible with data.
160 citations