Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Interaction with strong or short laser pulses III

A 40.7: Vortrag

Donnerstag, 20. März 2014, 15:30–15:45, BEBEL E34

Signatures of minicharged particles and paraphotons in a high-intensity laser field — •Selym Villalba Chavez and Carsten Müller — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf

Polarimetric experiments in the field of a high-intensity laser wave are illuminating scenarios from which the low energy frontiers of the standard model can be investigated. Particularly, the occurrence of extra U(1) symmetries implies the existence of both hidden-photons called paraphotons and light minicharged particles. We show how the absorption and dispersion of probe photons in the vacuum polarized by a high-intensity circularly polarized laser field are modified due to the coupling between the visible electromagnetic sector and these hypothetical degrees of freedom. The result of this analysis reveals that – in such a background – only the regime close to the two-photon reaction can be a sensitive probe of these hidden particles. Parameters of modern laser systems are used to impose stringent constraints on the respective coupling constants in regions where experiments driven by dipole magnets are less constricted.

[1] S. Villalba-Chavez and C. Müller, Ann. Phys. 339, 460 (2013).