The Low-Energy Frontier of Particle Physics

Jaeckel, Joerg; Ringwald, Andreas

doi:10.1146/annurev.nucl.012809.104433

Cited by 954 publications

(1,119 citation statements)

References 268 publications

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“…If the expansion of the Universe is adiabatic and the CMB spectrum was a black-body at the time it originated, this shape will be preserved with its temperature evolving as T (z) = T 0 (1 + z). This is a robust prediction of standard cosmology, but it is violated in many non-standard models, including string theory motivated scenarios where photons mix with other particles such as axions (see [2] for a recent review), and those where dimensionless couplings like the fine-structure constant vary [3].…”

Section: Introductionmentioning

confidence: 99%

Constraints on the CMB temperature-redshift dependence from SZ and distance measurements

Avgoustidis

Luzzi

Martins

et al. 2012

J. Cosmol. Astropart. Phys.

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Abstract. The relation between redshift and the CMB temperature, T CMB (z) = T 0 (1 + z) is a key prediction of standard cosmology, but is violated in many nonstandard models. Constraining possible deviations to this law is an effective way to test the ΛCDM paradigm and search for hints of new physics. We present state-ofthe-art constraints, using both direct and indirect measurements. In particular, we point out that in models where photons can be created or destroyed, not only does the temperature-redshift relation change, but so does the distance duality relation, and these departures from the standard behaviour are related, providing us with an opportunity to improve constraints. We show that current datasets limit possible deviations of the form T CMB (z) = T 0 (1 + z) 1−β to be β = 0.004 ± 0.016 up to a redshift z ∼ 3. We also discuss how, with the next generation of space and ground-based experiments, these constraints can be improved by more than one order of magnitude.

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Section: Introductionmentioning

confidence: 99%

Constraints on the CMB temperature-redshift dependence from SZ and distance measurements

Avgoustidis

Luzzi

Martins

et al. 2012

J. Cosmol. Astropart. Phys.

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“…Comprehensive reviews of the phenomenology associated with generalized-axion dark-matter candidates and the bounds on their masses, couplings, etc., can be found in Refs. [18,36,37,69].…”

Section: Discussionmentioning

confidence: 99%

“…Early vacuum-energy domination is known not to be a problem for light axions and axion-like particles (see Ref. [37] and references therein) in purely four-dimensional theories.…”

Section: J Vacuum Energy and Overclosurementioning

confidence: 99%

Phenomenological constraints on axion models of dynamical dark matter

Thomas

2012

Phys. Rev. D

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In two recent papers [1,2] we introduced "dynamical dark matter" (DDM), a new framework for dark-matter physics in which the requirement of stability is replaced by a delicate balancing between lifetimes and cosmological abundances across a vast ensemble of individual dark-matter components whose collective behavior transcends that normally associated with traditional darkmatter candidates. We also presented an explicit model involving axions in large extra spacetime dimensions, and demonstrated that this model has all of the features necessary to constitute a viable realization of the general DDM framework. In this paper, we complete our study by performing a general analysis of all phenomenological constraints which are relevant to this bulk-axion DDM model. Although the analysis in this paper is primarily aimed at our specific DDM model, many of our findings have important implications for bulk axion theories in general. Our analysis can also serve as a prototype for phenomenological studies of theories in which there exist large numbers of interacting and decaying particles.

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“…For small values of χ ≪ 1, one finds that |ǫ| ≪ 1 due to which the weakly interacting charge carriers are called MCPs. It is opportune to emphasize that the hidden-photons can, in general, acquire a mass term ∼ m 2 γ ′ w µ w µ through the Higgs mechanism leading to a break down of the initial hidden U(1)−symmetry [5][6][7][8]. With the change of basis that brings the kinetic-mixing term to a diagonal form, the visible photons become massive particles ∼ χ 2 m 2 γ ′ a µ a µ and the resulting Lagrangian density L is no longer gauge invariant.…”

Section: Kinetic Mixing and Effective Actionmentioning

confidence: 99%

Light dark matter candidates in intense laser pulses I: paraphotons and fermionic minicharged particles

Villalba-Chávez

Müller

2015

J. High Energ. Phys.

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Polarimetric experiments driven by the strong field of a circularly polarized laser wave can become a powerful tool to limit the parameter space of not yet detected hidden-photons and minicharged particles associated with extra U(1) gauge symmetries. We show how the absorption and dispersion of probe electromagnetic waves in the vacuum polarized by such a background are modified due to the coupling between the visible U(1)-gauge sector and these hypothetical degrees of freedom. The results of this analysis reveal that the regime close to the two-photon reaction threshold can be a sensititive probe of these hidden particles. Parameters of modern laser systems are used to estimate the projected sensitivities on the corresponding coupling constants in regions where experiments driven by dipole magnets are less constricted. The role played by a paraphoton field is analyzed via a comparison with a model in which the existence of minicharges is assumed only. For both scenarios is found that the most stringent exclusion limit occurs at the lowest threshold mass; this one being determined by a certain combination of the field frequencies and dictated by energy momentum balance of the photo-production of a pair of minicharged particles. The dependencies of the observables on the laser attributes as well as on the unknown particle parameters are also analyzed.

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The Low-Energy Frontier of Particle Physics

Cited by 954 publications

References 268 publications

Constraints on the CMB temperature-redshift dependence from SZ and distance measurements

Constraints on the CMB temperature-redshift dependence from SZ and distance measurements

Phenomenological constraints on axion models of dynamical dark matter

Light dark matter candidates in intense laser pulses I: paraphotons and fermionic minicharged particles

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