Results 11 to 20 of about 238,715 (178)
Breaking rotations without violating the KSS viscosity bound
Journal of High Energy Physics, 2023 We revisit the computation of the shear viscosity to entropy ratio in a holographic p-wave superfluid model, focusing on the role of rotational symmetry breaking.
Matteo Baggioli +4 more
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Symmetry Breaking Soliton, Breather, and Lump Solutions of a Nonlocal Kadomtsev–Petviashvili System
Complexity, 2020 The Kadomtsev–Petviashvili equation is one of the well-studied models of nonlinear waves in dispersive media and in multicomponent plasmas. In this paper, the coupled Alice-Bob system of the Kadomtsev–Petviashvili equation is first constructed via the ...
Hong-Yu Wu +4 more
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Dark Energy, QCD Axion, and Trans-Planckian-Inflaton Decay Constant
Universe, 2017 Pseudoscalars appear frequently in particle spectra. They can be light if they appear as pseudo-Goldstone bosons from some spontaneously broken global symmetries with the decay constant f.
Jihn E. Kim
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Cosmology of the Twin Higgs without explicit ℤ2 breaking
Journal of High Energy Physics, 2021 The cosmology of the Twin Higgs requires the breaking of the ℤ2 symmetry, but it is still an open question whether this breaking needs to be explicit.
Hugues Beauchesne, Yevgeny Kats
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Non-conformal entanglement entropy
Journal of High Energy Physics, 2018 We explore the behaviour of renormalized entanglement entropy in a variety of holographic models: non-conformal branes; the Witten model for QCD; UV conformal RG flows driven by explicit and spontaneous symmetry breaking and Schrödinger geometries ...
Marika Taylor, William Woodhead
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Abundant Symmetry-Breaking Solutions of the Nonlocal Alice–Bob Benjamin–Ono System
Complexity, 2020 The Benjamin–Ono equation is a useful model to describe the long internal gravity waves in deep stratified fluids. In this paper, the nonlocal Alice–Bob Benjamin–Ono system is induced via the parity and time-reversal symmetry reduction. By introducing an
Wang Shen +4 more
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No-go for tree-level R-symmetry breaking
European Physical Journal C: Particles and Fields, 2017 We show that in gauge mediation models with tree-level R-symmetry breaking where supersymmetry and R-symmetries are broken by different fields, the gaugino mass either vanishes at one loop or finds a contribution from loop-level R-symmetry breaking. Thus
Feihu Liu, Muyang Liu, Zheng Sun
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The effective action of superrotation modes
Journal of High Energy Physics, 2021 Starting from an analysis of four-dimensional asymptotically flat gravity in first order formulation, we show that superrotation reparametrization modes are governed by an Alekseev-Shatashvili action on the celestial sphere.
Kévin Nguyen, Jakob Salzer
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Gravity Theories with Background Fields and Spacetime Symmetry Breaking [PDF]
Symmetry 9, 230 (2017), 2017 An overview is given of effective gravitational field theories with fixed background fields that break spacetime symmetry. The behavior of the background fields and the types of excitations that can occur depend on whether the symmetry breaking is explicit or spontaneous.
arxiv +1 more source
$$ \mu -\tau $$ μ-τ reflection symmetry embedded in minimal seesaw
European Physical Journal C: Particles and Fields, 2018 We embed $$\mu -\tau $$ μ-τ reflection symmetry into the minimal seesaw formalism, where two right-handed neutrinos are added to the Standard Model of particle physics. Assuming that both the left- and right-handed neutrino fields transform under $$\mu -\
Newton Nath, Zhi-zhong Xing, Jue Zhang
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