Results 61 to 70 of about 238,715 (178)
Gravity with background fields and diffeomorphism breaking [PDF]
arXiv, 2016 Effective gravitational field theories with background fields break local Lorentz symmetry and diffeomorphism invariance. Examples include Chern-Simons gravity, massive gravity, and the Standard-Model Extension (SME). The physical properties and behavior of these theories depend greatly on whether the spacetime symmetry breaking is explicit or ...
arxiv
Designer Curved-Space Geometry for Relativistic Fermions in Weyl Metamaterials
Physical Review X, 2017 Weyl semimetals are recently discovered materials supporting emergent relativistic fermions in the vicinity of band-crossing points known as Weyl nodes.
Alex Westström, Teemu Ojanen
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SU(2) Higher-order effective quark interactions from polarization
Physics Letters B, 2016 Higher order quark effective interactions are found for SU(2) flavor by departing from a non-local quark–quark interaction. By integrating out a component of the quark field, the determinant is expanded in chirally symmetric and symmetry breaking ...
Fábio L. Braghin
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Inflaton as a pseudo-Nambu-Goldstone boson
Physics Letters B, 2023 In the realistic model of cosmic inflation the inflaton potential should be flat and stable under quantum corrections. It is natural to imagine that there is some symmetry behind and an idea of the inflaton as a Nambu-Goldstone boson of spontaneous ...
Noriaki Kitazawa
doaj
B−L as a gauged Peccei-Quinn symmetry
Journal of High Energy Physics, 2018 The gauged Peccei-Quinn (PQ) mechanism provides a simple prescription to embed the global PQ symmetry into a gauged U(1) symmetry. As it originates from the gauged PQ symmetry, the global PQ symmetry can be protected from explicit breaking by quantum ...
Masahiro Ibe +2 more
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Breaking of scaling symmetry by massless scalar on de Sitter
Physics Letters B, 2019 We study the response of a classical massless minimally coupled scalar to a static point scalar charge on de Sitter. By considering explicit solutions of the problem we conclude that – even though the dynamics formally admits dilatation (scaling ...
D. Glavan +3 more
doaj
Background Fields and Gravity [PDF]
arXiv, 2016 Gravitational theories with fixed background fields break diffeomorphism invariance. This breaking can be spontaneous or explicit. A brief summary of the main consequences of these types of breaking is presented.
arxiv
A Tale of Two Twin Higgses: Addressing Little Hierarchy in Natural 2HDM Framework [PDF]
arXiv, 2016 In original twin Higgs model, vacuum misalignment between electroweak and new physics scales is realized by adding explicit $\mathbb{Z}_2$ breaking term. Introducing additional twin Higgs could accommodate spontaneous $\mathbb{Z}_2$ breaking, which explains the origin of this misalignment. We introduce a class of two twin Higgs doublet models with most
arxiv
A simple holographic model for spontaneous breaking of translational symmetry
European Physical Journal C: Particles and Fields, 2019 It has been shown that holographic massive gravities can effectively realize spontaneous breaking of translational symmetry in homogenous manners. In this work, we consider a toy model of such category by adding a special gauge-axion coupling to the bulk
Wei-Jia Li, Jian-Pin Wu
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Spontaneous versus explicit breaking of a continuous global symmetry [PDF]
, 1990 M. Lusignoli, A. Masiero, M. Roncadelli
openalex +1 more source