Annihilation of Secluded Dark Matter into W+W- Enhanced by P-wave Sommerfeld Effect

TL;DR

This paper proposes a model where secluded dark matter annihilation into W+W- is enhanced by p-wave Sommerfeld effects, potentially explaining gamma-ray signals, with supersymmetry providing a minimal framework.

Contribution

It introduces a p-wave Sommerfeld enhancement mechanism for dark matter annihilation into W+W-, applicable within supersymmetric models.

Findings

Dark matter annihilation into W+W- can be significantly amplified by p-wave Sommerfeld effect.

Weak coupling to Higgs bosons facilitates loop-induced annihilation processes.

Supersymmetric models can naturally incorporate this enhanced annihilation mechanism.

Abstract

We propose that a pair of annihilation of the secluded dark matter may accommodate a source of the halo gamma ray signal reported recently, through the p-wave Sommerfeld enhancement. We show that given a weakly coupling of the dark sector to the Higgs bosons, the dark matter annihilation into W+W-, even though induced at 1-loop level, is desirably amplified. We also argue that the supersymmetric framework may readily embody such a model within rather minimal contents.