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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 paper, the authors compute the contribution of order α-S^2\alpha^2$ to the cross section of a top-antitop pair in association with at least one heavy Standard Model boson (Z, W^\pm, and Higgs) by including all effects of QCD, QED, and weak origin.
Abstract: We compute the contribution of order $\alpha_S^2\alpha^2$ to the cross section of a top-antitop pair in association with at least one heavy Standard Model boson -- $Z$, $W^\pm$, and Higgs -- by including all effects of QCD, QED, and weak origin and by working in the automated MadGraph5_aMC@NLO framework. This next-to-leading order contribution is then combined with that of order $\alpha_S^3\alpha$, and with the two dominant lowest-order ones, $\alpha_S^2\alpha$ and $\alpha_S\alpha^2$, to obtain phenomenological results relevant to a 8, 13, and 100~TeV $pp$ collider.
131 citations
TL;DR: In this article, the authors study the possible origin of neutrino mass in such models, both at tree-level and radiatively, and show that the electroweak Higgs can be interpreted as the pseudo-Goldstone boson of broken scale invariance.
Abstract: Scale invariance may be a classical symmetry which is broken radiatively. This provides a simple way to stabilize the scale of electroweak symmetry breaking against radiative corrections. The simplest phenomenologically successful model of this type involves the addition of one real scalar field to the standard model. In this minimal model the electroweak Higgs can be interpreted as the pseudo-Goldstone boson of broken scale invariance. We study the possible origin of neutrino mass in such models, both at tree-level and radiatively.
131 citations
TL;DR: In this article, the authors show that the results from the ATLAS and CMS collaborations which observe an excess in the γγ and 4l ± search channels corresponding to a Higgs boson with a mass MH �125 GeV, cannot rule out the fourth generation possibility if the H!γγ decay rate is evaluated when naively implementing the leading O(GFm 2 ′) electroweak corrections.
131 citations
TL;DR: In this article, the authors apply the strategy of regions within dimensional regularization to find functions involved in evolution equations which govern the asymptotic dynamics of the Abelian form factor and four-fermion amplitude in the SU(N) gauge theory in the Sudakov limit up to the next-to-leading logarithmic approximation.
Abstract: We apply the strategy of regions within dimensional regularization to find functions involved in evolution equations which govern the asymptotic dynamics of the Abelian form factor and four-fermion amplitude in the SU(N) gauge theory in the Sudakov limit up to the next-to-leading logarithmic approximation. The results are used for the analysis of the dominant electroweak corrections to the fermion-antifermion pair production in the $e^+e^-$
annihilation at high energy.
131 citations
TL;DR: In this paper, a simple model of lepton masses and mixings in RS models based on the A4 non-abelian discrete symmetry was presented, and the minimal field content and symmetry breaking pattern necessary to obtain a successful model of this type was presented.
Abstract: In order to explain the non-hierarchical neutrino mixing angles and the absence of lepton flavor violating processes in the context of warped extra dimensions one needs to introduce bulk flavor symmetries. We present a simple model of lepton masses and mixings in RS models based on the A4 non-abelian discrete symmetry. The virtues of this choice are: (i) the natural appearance of the tri-bimaximal mixing pattern; (ii) the complete absence of tree-level flavor violations in the neutral sector; (iii) the absence of flavor gauge bosons; (iv) the hierarchies in the charged lepton masses are explained via wave-function overlaps. We present the minimal field content and symmetry breaking pattern necessary to obtain a successful model of this type. The bounds from electroweak precision measurements allow the KK mass scale to be as low as ∼ 3TeV. Tree-level lepton flavor violation is absent in this model, while the loop induced � → eγ branching fraction is safely below the experimental bound.
130 citations