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We propose a version of a gravitational theory with the torsion field, induced by the chameleon field. Following Hojman et al. Phys. Rev. D17, 3141 (1976) the results, obtained in Phys. Rev. D90, 045040 (2014), are generalised by extending…

General Relativity and Quantum Cosmology · Physics 2015-04-23 A. N. Ivanov , M. Wellenzohn

We explore the possibility of modeling electroweak physics in a warped extra dimension with a soft wall. The infrared boundary is replaced with a smoothly varying dilaton field that provides a dynamical spacetime cutoff. We analyze gravity,…

High Energy Physics - Phenomenology · Physics 2008-12-30 Brian Batell , Tony Gherghetta , Daniel Sword

In these lectures we give a discussion of the structure of the electroweak standard model and its quantum corrections for tests of the electroweak theory. The predictions for the vector boson masses, neutrino scattering cross sections and…

High Energy Physics - Phenomenology · Physics 2007-05-23 W. Hollik

We review the empirical evidence for the validity of the Standard Electroweak Theory in nature. The experimental data are interpreted in terms of an effective Lagrangian for Z physics, allowing for potential sources of SU(2) violation and…

High Energy Physics - Phenomenology · Physics 2007-05-23 Dieter Schildknecht

It is possible to construct models based on warped extra dimensions in which electroweak symmetry breaking takes place without the introduction of any Higgs fields. This breaking can occur through the judiciuous choice of boundary…

High Energy Physics - Phenomenology · Physics 2007-05-23 Thomas G. Rizzo

We consider a class of simplified models of dynamical electroweak symmetry breaking built in terms of their five-dimensional weakly-coupled gravity duals, in the spirit of bottom-up holography. The sigma-model consists of two abelian gauge…

High Energy Physics - Phenomenology · Physics 2015-12-09 Daniel Elander , Robert Lawrance , Maurizio Piai

Whether the Standard Model electroweak vacuum is stable, metastable or unstable depends crucially on the top mass (and, to a lesser extent, on other measurable quantities). These topics are reviewed and updated by taking into account the…

High Energy Physics - Phenomenology · Physics 2018-01-10 Alberto Salvio

Nowadays the field of searching for a new physics became a very interesting subject in a light meson decays due to a recent results from KTeV collaboration which found the 3.3\sigma\ disagreement between Standard Model theory and their…

Nuclear Experiment · Physics 2013-01-28 Marcin Berlowski

In many strongly-interacting models of electroweak symmetry breaking the lowest-lying observable particle is a pseudo-Goldstone boson of approximate scale symmetry, the pseudo-dilaton. Its interactions with Standard Model particles can be…

High Energy Physics - Phenomenology · Physics 2015-06-03 Bruce A. Campbell , John Ellis , Keith A. Olive

The extension of the Standard Model by a spontaneously broken abelian gauge group based on the L(mu)-L(tau) lepton number can resolve the longstanding discrepancy between experimental and theoretical values for the magnetic moment of the…

High Energy Physics - Phenomenology · Physics 2011-10-11 Julian Heeck , Werner Rodejohann

We suggest an appealing strategy to probe a large class of scenarios beyond the Standard Model simultaneously explaining the recent CDF II measurement of the $W$ boson mass and predicting first-order phase transitions (FOPT) testable in…

High Energy Physics - Phenomenology · Physics 2023-03-14 Andrea Addazi , Antonino Marciano , António P. Morais , Roman Pasechnik , Hao Yang

A massless electroweak theory for leptons is formulated in a Weyl space, W_4, yielding a Weyl invariant gauge dynamics allowing for conformal rescalings of the metric and all fields with nonvanishing Weyl weight together with the…

General Relativity and Quantum Cosmology · Physics 2022-10-12 Wolfgang Drechsler

The measurements of electroweak sector of the Standard Model are presented, including most recent results from LEP, Tevatron and HERA colliders. The robustness of the Standard Model is illustrated with the precision measurements, the…

High Energy Physics - Experiment · Physics 2009-11-11 Cristinel Diaconu

A new dynamical symmetry breaking model of electroweak interactions is proposed based on interacting fermions. Two fermions of different SU_{L}(2) representations form a symmetry breaking condensate and generate the lepton and quark masses.…

High Energy Physics - Phenomenology · Physics 2009-01-07 G. Cynolter , E. Lendvai , G. Pocsik

Gauge boson masses for a minimal $SU(4)_{EW} \otimes U(1)_{B-l}$ model]{Following the general procedure of spontaneous symmetry breaking of a $SU(4)_{EW} \otimes U(1)_{B-l}$ electroweak gauge group with left-right symmetry, we obtain the…

High Energy Physics - Phenomenology · Physics 2009-11-10 Alex E. Bernardini

The lack of deviations from the Standard Model at the current level of experimental precision can be explained systematically in suitable models of dynamical electro-weak symmetry breaking. The key ingredient is dynamics which produces a…

High Energy Physics - Phenomenology · Physics 2016-09-06 M. Lindner

We consider electroweak symmetry breaking in supersymmetric models with an extra non-anomalous U(1)' gauge symmetry and an extra standard-model singlet scalar S. For appropriate charges the U(1)' forbids an elementary mu term, but an…

High Energy Physics - Phenomenology · Physics 2014-11-17 M. Cvetic , D. A. Demir , J. R. Espinosa , L. Everett , P. Langacker

The precise measurement of physics observables and the test of their consistency within the standard model (SM) are an invaluable approach, complemented by direct searches for new particles, to determine the existence of physics beyond the…

We present a model that unites the electroweak interaction with general relativity without specifying a space-time metric. This is made possible by embedding the kinetic terms for gravity and electroweak theory using one $\SL$ connection…

High Energy Physics - Theory · Physics 2007-07-02 Stephon H. S. Alexander

Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon asymmetry of the universe and the spectrum of gravitational…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-23 Marek Lewicki , Marco Merchand , Mateusz Zych