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arXiv · 1507.00571

Dark matter and spin-1 milli-charged particles

Emidio Gabrielli·Luca Marzola·Martti Raidal·Hardi Veermäe
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Abstract

New physics scenarios beyond the Standard Model predict the existence of milli-charged particles. So far, only spin-1/2 and spin-0 milli-charged particles have been considered in literature, leaving out the interesting case of spin-1. We propose a minimal unitary and renormalizable model of massive milli-charged vector particles. Unitarity requires that these particles are gauge bosons of a non-abelian spontaneously broken gauge symmetry. The minimal scenario then consists of an extended Standard Model gauge group $SU(2)_L \times U(1)_Y \times SU(2)_D$ together with a $SU(2)_D$ dark Higgs boson responsible for the symmetry breaking in the dark sector. By imposing that the dark Higgs multiplet has a non-vanishing milli-hypercharge, stable milli-charged spin-1 fields arise thereby providing a potential dark matter candidate. We analyse the phenomenological constraints on this scenario and discuss their implications.

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Emidio Gabrielli, Luca Marzola, Martti Raidal, Hardi Veermäe. 2015-07-02. Dark matter and spin-1 milli-charged particles. https://arxiv.org/abs/1507.00571

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