Planck satellite constraints on pseudo-Nambu-Goldstone boson quintessence

AbstractThe Higgs sector in neutral naturalness models provides a portal to the hidden sectors, and thus measurements of Higgs couplings at current and future colliders play a central role in constraining the parameter space of the model. We investigate a class of neutral naturalness models, in which the Higgs boson is a pseudo-Goldstone boson from the universal SO(N)/SO(N −1) coset structure. Integrating out the radial mode from the spontaneous global symmetry breaking, we obtain various dimension-six operators in the Standard Model effective field theory, and calculate the low energy Higgs effective potential with radiative corrections included. We perform aχ2fit to the Higgs coupling precision measurements at current and future colliders and show that the new physics scale could be explored up to 2.3 (2.4) TeV without (with) the Higgs invisible decay channels at future Higgs factories. The limits are comparable to the indirect constraints obtained via electroweak precision measurements.

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Structure of flavor changing Goldstone boson interactions

Journal of High Energy Physics ◽

10.1007/jhep04(2021)141 ◽

2021 ◽

Vol 2021 (4) ◽

Author(s):

Jin Sun ◽

Yu Cheng ◽

Xiao-Gang He

Keyword(s):

Symmetry Breaking ◽

Model Building ◽

Neutral Current ◽

Goldstone Boson ◽

New Physics ◽

Majorana Neutrino ◽

Neutrino Masses ◽

Type I ◽

Flavor Changing ◽

Flavor Changing Neutral Current

Abstract General flavor changing Goldstone boson (GB) interactions with fermions from a spontaneous global U(1)G symmetry breaking are discussed. This GB may be the Axion, solving the strong QCD CP problem, if there is a QCD anomaly for the assignments of quarks U(1)G charge. Or it may be the Majoron, producing seesaw Majorana neutrino masses by lepton number violation, if the symmetry breaking scale is much higher than the electroweak scale. It may also, in principle, play the roles of Axion and Majoron simultaneously as far as providing solution for the strong CP problem and generating a small Majorana neutrino masses are concerned. Great attentions have been focused on flavor conserving GB interactions. Recently flavor changing Axion and Majoron models have been studied in the hope to find new physics from rare decays in the intensity frontier. In this work, we will provide a systematic model building aspect study for flavor changing neutral current (FCNC) GB interactions in the fermion sectors, or separately in the quark, charged lepton and neutrino sectors and will identify in detail the sources of FCNC interactions in a class of beyond standard model with a spontaneous global U(1)G symmetry breaking. We also provide a general proof of the equivalence of using physical GB components and GB broken generators for calculating GB couplings to two gluons and two photons, and discuss some issues related to spontaneous CP violation models. Besides, we will also provide some details for obtaining FCNC GB interactions in several popular models, such as the Type-I, -II, -III seesaw and Left-Right symmetric models, and point out some special features in these models.

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Relaxing cosmological neutrino mass bounds with unstable neutrinos

Journal of High Energy Physics ◽

10.1007/jhep12(2020)119 ◽

2020 ◽

Vol 2020 (12) ◽

Author(s):

Miguel Escudero ◽

Jacobo Lopez-Pavon ◽

Nuria Rius ◽

Stefan Sandner

Keyword(s):

Neutrino Mass ◽

Particle Physics ◽

Goldstone Boson ◽

Mass Scale ◽

Simple Extension ◽

Type I ◽

Mass Generation ◽

Age Of The Universe ◽

Neutrino Mass Models ◽

The Right

Abstract At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model (ΛCDM), the Planck collaboration reports ∑mv< 0.12 eV at 95 % CL. This bound, taken at face value, excludes many neutrino mass models. However, unstable neutrinos, with lifetimes shorter than the age of the universe τν ≲ tU, represent a particle physics avenue to relax this constraint. Motivated by this fact, we present a taxonomy of neutrino decay modes, categorizing them in terms of particle content and final decay products. Taking into account the relevant phenomenological bounds, our analysis shows that 2-body decaying neutrinos into BSM particles are a promising option to relax cosmological neutrino mass bounds. We then build a simple extension of the type I seesaw scenario by adding one sterile state ν4 and a Goldstone boson ϕ, in which νi→ ν4ϕ decays can loosen the neutrino mass bounds up to ∑mv ∼ 1 eV, without spoiling the light neutrino mass generation mechanism. Remarkably, this is possible for a large range of the right-handed neutrino masses, from the electroweak up to the GUT scale. We successfully implement this idea in the context of minimal neutrino mass models based on a U(1)μ−τ flavor symmetry, which are otherwise in tension with the current bound on ∑mv.

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Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

Physics Letters B ◽

10.1016/s0370-2693(01)00622-0 ◽

2001 ◽

Vol 511 (1) ◽

pp. 33-39 ◽

Cited By ~ 111

Author(s):

R.F. Wagenbrunn ◽

S. Boffi ◽

W. Klink ◽

W. Plessas ◽

M. Radici

Keyword(s):

Quark Model ◽

Goldstone Boson ◽

Form Factors ◽

Electromagnetic Form Factors ◽

Boson Exchange

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Pair production of W and Z bosons and the goldstone boson equivalence theorem

Annals of Physics ◽

10.1016/s0003-4916(88)80016-2 ◽

1988 ◽

Vol 186 (1) ◽

pp. 15-42 ◽

Cited By ~ 9

Author(s):

Scott S.D. Willenbrock

Keyword(s):

Pair Production ◽

Goldstone Boson ◽

Z Bosons ◽

Equivalence Theorem

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125 GeV Higgs boson as a pseudo-Goldstone boson in supersymmetry with vectorlike matters

Physical Review D ◽

10.1103/physrevd.87.015014 ◽

2013 ◽

Vol 87 (1) ◽

Cited By ~ 13

Author(s):

Kyu Jung Bae ◽

Tae Hyun Jung ◽

Hyung Do Kim

Keyword(s):

Higgs Boson ◽

Goldstone Boson ◽

Pseudo Goldstone Boson

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Magnetophonons & type-B Goldstones from hydrodynamics to holography

Journal of High Energy Physics ◽

10.1007/jhep09(2020)037 ◽

2020 ◽

Vol 2020 (9) ◽

Cited By ~ 2

Author(s):

Matteo Baggioli ◽

Sebastian Grieninger ◽

Li Li

Keyword(s):

Magnetic Field ◽

2D Materials ◽

Goldstone Boson ◽

Quasinormal Modes ◽

Effective Field ◽

Zero Magnetic Field ◽

Type B ◽

Hydrodynamic Modes ◽

Pinning Mechanism ◽

The Magnetic Field

Abstract We perform a detailed analysis of a large class of effective holographic models with broken translations at finite charge density and magnetic field. We exhaustively discuss the dispersion relations of the hydrodynamic modes at zero magnetic field and successfully match them to the predictions from charged hydrodynamics. At finite magnetic field, we identify the presence of an expected type-B Goldstone boson Re[ω] ∼ k2, known as magnetophonon and its gapped partner — the magnetoplasmon. We discuss their properties in relation to the effective field theory and hydrodynamics expectations. Finally, we compute the optical conductivities and the quasinormal modes at finite magnetic field. We observe that the pinning frequency of the magneto-resonance peak increases with the magnetic field, in agreement with experimental data on certain 2D materials, revealing the quantum nature of the holographic pinning mechanism.

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