Mixing of photons with light pseudoscalars in time-dependent magnetic fields

Paola Arias,Ariel Arza,Jorge Gamboa

doi:10.1140/epjc/s10052-016-4483-0

Paola Arias, Ariel Arza + Show 1 more

Open Access

https://doi.org/10.1140/epjc/s10052-016-4483-0

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Abstract

The effects of an external time-dependent magnetic field in the conversion probability of photon-to-axion-like particles are studied. Our findings show that for a certain time regime, the amplitude of the produced axion-like field can be enlarged with respect to the static case, thus, enhancing the probability of conversion.

Highlights

Particles beyond the Standard Model (SM) are frequently invoked to solve some tensions or fine tuning issues of the model
The most iconic example is the absence of a dark matter candidate, where usually proposals like Weakly Interacting Massive Particles (WIMPs) and Weakly Interacting Slim Particles (WISPs) take the lead, but some other exotic options have been put forward
The most accepted solution to this problem is the existence of a new U(1) symmetry, the Peccei–Quinn symmetry, which is spontaneously broken at very high energies fa

Summary

Introduction

Particles beyond the Standard Model (SM) are frequently invoked to solve some tensions or fine tuning issues of the model. For instance in [6,7,8,9] it has been shown that every string theory has at least one zero-mode or axion-like particle (abbreviated ALP throughout) in the fourdimensional reduction These new (pseudo) scalar bosons (φ) can develop couplings such as the one in Eq (1), but they do not feature the a priori relationship between the coupling and the mass (mφ). New pseudoscalar bosons can be searched for exploiting the coupling to two photons, specially via the Primakoff effect: a photon beam is sent transversally to a region with a strong electric or magnetic field (sea of virtual photons) so the conversion (oscillation) of photons into ALPs can take place. In this paper we are interested in studying the effects of time-dependent magnetic fields on the conversion probability of new scalars that share the coupling to two photons given by Eq (1) via Primakoff effect.

Photon–ALP conversion in a time-dependent magnetic field

Discussion and outlook