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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, a new symmetry, denoted as T-parity, under which all heavy gauge bosons and scalar triplets are odd, can remove all the tree-level contributions to the electroweak observables and therefore make the little Higgs theories completely natural.
Abstract: Little Higgs theories are an attempt to address the ``little hierarchy problem,'' ie, the tension between the naturalness of the electroweak scale and the precision electroweak measurements showing no evidence for new physics up to 5 – 10 TeV In little Higgs theories, the Higgs mass-squareds are protected at one-loop order from the quadratic divergences This allows the cutoff of the theory to be raised up to ~ 10 TeV, beyond the scales probed by the current precision data However, strong constraints can still arise from the contributions of the new TeV scale particles which cancel the one-loop quadratic divergences from the standard model fields, and hence re-introduces the fine-tuning problem In this paper we show that a new symmetry, denoted as T-parity, under which all heavy gauge bosons and scalar triplets are odd, can remove all the tree-level contributions to the electroweak observables and therefore makes the little Higgs theories completely natural The T-parity can be manifestly implemented in a majority of little Higgs models by following the most general construction of the low energy effective theory a la Callan, Coleman, Wess and Zumino In particular, we discuss in detail how to implement the T-parity in the littlest Higgs model based on SU(5)/SO(5) The symmetry breaking scale f can be even lower than 500 GeV if the contributions from the higher dimensional operators due to the unknown UV physics at the cutoff are somewhat small The existence of T-parity has drastic impacts on the phenomenology of the little Higgs theories The T-odd particles need to be pair-produced and will cascade down to the lightest T-odd particle (LTP) which is stable A neutral LTP gives rise to missing energy signals at the colliders which can mimic supersymmetry It can also serve as a good dark matter candidate

407 citations

Journal ArticleDOI
A. Abada1, Marcello Abbrescia2, Marcello Abbrescia3, Shehu S. AbdusSalam4  +1501 moreInstitutions (239)
TL;DR: In this article, the physics opportunities of the Future Circular Collider (FC) were reviewed, covering its e+e-, pp, ep and heavy ion programs, and the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions.
Abstract: We review the physics opportunities of the Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.

407 citations

Journal ArticleDOI
TL;DR: In this article, general expressions for the oblique parameters S, T, U, V, W, and X in the SU(2)×U(1) electroweak model with an arbitrary number of scalar SU( 2) doublets, with hypercharge ± 1/2, and an arbitrary scalar singlets.

401 citations

Journal ArticleDOI
TL;DR: In this paper, the effective Lagrangian that describes a light Higgs-like boson was revisited to better clarify a few issues which were not exhaustively addressed in the previous literature.
Abstract: We reconsider the effective Lagrangian that describes a light Higgs-like boson and better clarify a few issues which were not exhaustively addressed in the previous literature. In particular we highlight the strategy to determine whether the dynamics responsible for the electroweak symmetry breaking is weakly or strongly interacting. We also discuss how the effective Lagrangian can be implemented into automatic tools for the calculation of Higgs decay rates and production cross sections.

398 citations

Journal ArticleDOI
TL;DR: The Fully Exclusive W and Z Production (FEWZ) simulation code as mentioned in this paper combines the Drell-Yan mechanism with the next-to-leading-order (NLO) electroweak corrections within the framework of the FEWZ simulation code.
Abstract: We combine the next-to-next-to-leading order QCD corrections to lepton-pair production through the Drell-Yan mechanism with the next-to-leading order (NLO) electroweak corrections within the framework of the Fully Exclusive W and Z Production (FEWZ) simulation code. Control over both sources of higher-order contributions is necessary for measurements where percent-level theoretical predictions are crucial and in phase-space regions where the NLO electroweak corrections grow large. The inclusion of both corrections in a single simulation code eliminates the need to separately incorporate such effects as final-state radiation and electroweak Sudakov logarithms when comparing many experimental results to theory. We recalculate the NLO electroweak corrections in the complex-mass scheme for both massless and massive final-state leptons, and modify the QCD corrections in the original FEWZ code to maintain consistency with the complex-mass scheme to the lowest order. We present phenomenological results for LHC studies that include both next-to-next-to-leading order QCD and NLO electroweak corrections. In addition, we study several interesting kinematics features induced by experimental cuts in the distribution of photon radiation at the LHC.

397 citations


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