Charge Asymmetric Cosmic Rays as a probe of Flavor Violating Asymmetric Dark Matter

TL;DR

This paper explores how charge asymmetries in cosmic rays can serve as indicators of asymmetric dark matter, linking observed lepton excesses to dark sector properties and flavor violation.

Contribution

It introduces models of asymmetric dark matter capable of producing charge asymmetric cosmic rays and connects charge asymmetry to lepton flavor violation.

Findings

Charge asymmetry in cosmic rays suggests dark matter is asymmetric.

Models with spin zero, one, and one-half dark matter can produce charge asymmetries.

Lepton flavor violation is necessary for charge asymmetry in cosmic ray excesses.

Abstract

The recently introduced cosmic sum rules combine the data from PAMELA and Fermi-LAT cosmic ray experiments in a way that permits to neatly investigate whether the experimentally observed lepton excesses violate charge symmetry. One can in a simple way determine universal properties of the unknown component of the cosmic rays. Here we attribute a potential charge asymmetry to the dark sector. In particular we provide models of asymmetric dark matter able to produce charge asymmetric cosmic rays. We consider spin zero, spin one and spin one-half decaying dark matter candidates. We show that lepton flavor violation and asymmetric dark matter are both required to have a charge asymmetry in the cosmic ray lepton excesses. Therefore, an experimental evidence of charge asymmetry in the cosmic ray lepton excesses implies that dark matter is asymmetric.