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 present a solution to this problem that does not require an extension of the MSSM at the weak scale, and obtain rather sharp predictions on the spectrum.
194 citations
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TL;DR: In this article, the authors considered the theoretical and experimental constraints on two-Higgs-doublet models, focusing on the parameter space relevant to explain the present muon g-2 anomaly, Delta alpha(mu), in four different types of models, type I, II, lepton specific and flipped.
Abstract: We update the constraints on two-Higgs-doublet models (2HDMs) focusing on the parameter space relevant to explain the present muon g - 2 anomaly, Delta alpha(mu), in four different types of models, type I, II, ``lepton specific'' (or X) and ``flipped'' (or Y). We show that the strong constraints provided by the electroweak precision data on the mass of the pseudoscalar Higgs, whose contribution may account for Delta alpha(mu), are evaded in regions where the charged scalar is degenerate with the heavy neutral one and the mixing angles alpha and beta satisfy the Standard Model limit beta - alpha approximate to pi/2. We combine theoretical constraints from vacuum stability and perturbativity with direct and indirect bounds arising from collider and B physics. Possible future constraints from the electron g - 2 are also considered. If the 126 GeV resonance discovered at the LHC is interpreted as the light CP-even Higgs boson of the 2HDM, we find that only models of type X can satisfy all the considered theoretical and experimental constraints.
194 citations
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TL;DR: In this paper, a two-loop 10 × 10 anomalous dimension matrix O(� 2 ) involving current-current operators, QCD penguin operators, and electroweak penguin opera-tors was calculated for S = 1 weak non-leptonic decays, but also for B = 1 decays.
193 citations
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TL;DR: In this paper, an effective Lagrangian formalism for the calculation of flavour changing neutral and charged scalar currents in weak decays including SU(2)×U(1) symmetry breaking effects and the effects of the electroweak couplings g1 and g2 was presented.
193 citations
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TL;DR: In this paper, a composite Higgs version of the standard Higgs model based on the coset $SO(7)/SO(6) was proposed, where elementary fermions were embedded in appropriate representations of a coset and all dominant interactions were described by only three free effective parameters.
Abstract: A minimal extension of the Standard Model that provides both a dark matter candidate and a strong first-order electroweak phase transition (EWPT) consists of two additional Lorentz and gauge singlets. In this paper we work out a composite Higgs version of this scenario, based on the coset $SO(7)/SO(6)$. We show that by embedding the elementary fermions in appropriate representations of $SO(7)$, all dominant interactions are described by only three free effective parameters. Within the model dependencies of the embedding, the theory predicts one of the singlets to be stable and responsible for the observed dark matter abundance. At the same time, the second singlet introduces new $CP$-violation phases and triggers a strong first-order EWPT, making electroweak baryogenesis feasible. It turns out that this scenario does not conflict with current observations and it is promising for solving the dark matter and baryon asymmetry puzzles. The tight predictions of the model will be accessible at the forthcoming dark matter direct detection and gravitational wave experiments.
192 citations