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 paper, the lifetime of the universe has been shown to last more than 1058 years, with 95% confidence, using phase diagrams in the mt/mh and mt/αs planes with uncertainty bands.
Abstract: In a classically scale-invariant quantum field theory, tunneling rates are infrared divergent due to the existence of instantons of any size. While one expects such divergences to be resolved by quantum effects, it has been unclear how higher-loop corrections can resolve a problem appearing already at one loop. With a careful power counting, we uncover a series of loop contributions that dominate over the one-loop result and sum all the necessary terms. We also clarify previously incomplete treatments of related issues pertaining to global symmetries, gauge fixing, and finite mass effects. In addition, we produce exact closed-form solutions for the functional determinants over scalars, fermions, and vector bosons around the scale-invariant bounce, demonstrating manifest gauge invariance in the vector case. With these problems solved, we produce the first complete calculation of the lifetime of our Universe: 10139 years. With 95% confidence, we expect our Universe to last more than 1058 years. The uncertainty is part experimental uncertainty on the top quark mass and on αs and part theory uncertainty from electroweak threshold corrections. Using our complete result, we provide phase diagrams in the mt/mh and the mt/αs planes, with uncertainty bands. To rule out absolute stability to 3σ confidence, the uncertainty on the top quark pole mass would have to be pushed below 250 MeV or the uncertainty on αs(mZ) pushed below 0.00025.
122 citations
TL;DR: In this article, the authors updated their analysis of the technicolor theories with techniquarks in higher dimensional representations of the group in the light of the new electroweak precision data on the $Z$ resonance.
Abstract: We update our analysis of technicolor theories with techniquarks in higher dimensional representations of the technicolor gauge group in the light of the new electroweak precision data on the $Z$ resonance.
122 citations
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TL;DR: In this paper, the weak mixing angle at energy scales relevant for present and future low energy electroweak measurements was determined, which is the electroweak analog of the electromagnetic fine structure constant.
Abstract: We determine the weak mixing angle at energy scales relevant for present and future low energy electroweak measurements. We discuss the renormalization group evolution in the MS-bar scheme, and argue that the uncertainty arising from the hadronic contribution is small compared to anticipated experimental errors. As a byproduct, we find a definition of the weak mixing angle which is the electroweak analog of the electromagnetic fine structure constant. Its value is given by sin^2 theta_W = 0.23867 +- 0.00016.
122 citations
TL;DR: In this article, the authors extended an earlier analysis of the non-supersymmetric two-Higgs-doublet model by allowing a more general potential for CP violation.
121 citations
TL;DR: In this article, two-loop corrections to the finite-temperature effective potential in the MSSM can have a dramatic effect on the strength of the electroweak phase transition, making it more strongly first order.
121 citations