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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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Journal ArticleDOI
TL;DR: In this paper, the effects of the U(1) subgroup using lattice Monte Carlo techniques were studied. And they showed that the first order transition still disappears for mH > mH,c.

228 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that the successful Higgs inflation scenario can also take place if the SM vacuum is not absolutely stable, based on two effects that were overlooked previously: effective renormalization of the SM couplings at the energy scale M-P/xi and symmetry restoration after inflation due to high temperature effects.
Abstract: The measurements of the Higgs mass and top Yukawa coupling indicate that we live in a very special universe, at the edge of the absolute stability of the electroweak vacuum. If fully stable, the Standard Model (SM) can be extended all the way up to the inflationary scale and the Higgs field, nonminimally coupled to gravity with strength xi, can be responsible for inflation. We show that the successful Higgs inflation scenario can also take place if the SM vacuum is not absolutely stable. This conclusion is based on two effects that were overlooked previously. The first one is associated with the effective renormalization of the SM couplings at the energy scale M-P/xi, where M-P is the Planck scale. The second one is a symmetry restoration after inflation due to high temperature effects that leads to the (temporary) disappearance of the vacuum at Planck values of the Higgs field.

228 citations

Journal ArticleDOI
TL;DR: In this paper, the leading corrections to the properties of W and Z bosons induced at the one-loop level in the SU(5)/SO(5) Littlest Higgs model with T parity were computed and a global fit to precision electroweak data was performed to determine the constraints on the model parameters.
Abstract: We compute the leading corrections to the properties of W and Z bosons induced at the one-loop level in the SU(5)/SO(5) Littlest Higgs model with T parity, and perform a global fit to precision electroweak data to determine the constraints on the model parameters. We find that a large part of the model parameter space is consistent with data. Values of the symmetry breaking scale f as low as 500 GeV are allowed, indicating that no significant fine tuning in the Higgs potential is required. We identify a region within the allowed parameter space in which the lightest T-odd particle, the partner of the hypercharge gauge boson, has the correct relic abundance to play the role of dark matter. In addition, we find that a consistent fit to data can be obtained for large values of the Higgs mass, up to 800 GeV, due to the possibility of a partial cancellation between the contributions to the T parameter from Higgs loops and new physics.

228 citations

Journal ArticleDOI
TL;DR: In this article, the cosmon is assumed to be the Goldstone boson of dilatation and to be broken spontaneously near the Planck scale, which drives the cosmological constant to zero, provided that the energy-momentum trace is purely anomalous.

228 citations

Journal ArticleDOI
TL;DR: Applying high order perturbative QCD results originally derived for the Bjorken sum rule to the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element Vud from superallowed nuclear beta decays reduces the theoretical loop uncertainty by about a factor of 2 and gives Vud=0.97377.
Abstract: A new method for computing hadronic effects on electroweak radiative corrections to low-energy weak interaction semileptonic processes is described. It employs high order perturbative QCD results originally derived for the Bjorken sum rule along with a large $N$ QCD-motivated interpolating function that matches long- and short-distance loop contributions. Applying this approach to the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element ${V}_{ud}$ from superallowed nuclear beta decays reduces the theoretical loop uncertainty by about a factor of 2 and gives ${V}_{ud}=0.973\text{ }77(11)(15)(19)$. Implications for CKM unitarity are briefly discussed.

227 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023368
2022916
2021548
2020527
2019574
2018660