Dark matter models with suppressed dark matter nuclei elastic cross section

TL;DR

This paper introduces two generalized dark photon models that predict suppressed dark matter-nuclei elastic cross sections, potentially affecting direct detection experiments, while maintaining standard collider search signatures.

Contribution

It proposes two novel dark photon models with suppressed elastic cross sections, incorporating nonlocal interactions and additional vector bosons, expanding the theoretical landscape of dark matter interactions.

Findings

Models predict suppressed elastic scattering cross sections.

Collider signatures remain unaffected by the suppression.

Theoretical consistency with renormalizable field theories is maintained.

Abstract

We propose two generalizations of the dark photon model which predict the suppressed elastic dark matter nuclei cross section in comparison with the corresponding prediction of the dark photon model. In the first model the main difference from dark photon model is that the mixing parameter $\epsilon$ is nonlocal formfactor $\epsilon(q^2)= \frac{q^2}{\Lambda^2}V(\frac{q^2}{\Lambda^2}) $ depending on the square of the momentum transfer $q^2$. Here $V(\frac{q^2}{\Lambda^2})$ is an entire function of the growth $\rho \geq \frac{1}{2}$ and $\Lambda$ is nonlocal scale. In this model our world and dark world are described by renormalizable field theories while the communication between them is performed by nonlocal interaction. The second model is renormalizable model where besides dark photon field $A'$ additional vector boson $Z'$ interacts with $B - L$ current. The communication between our world and dark world is performed due to nonzero kinetic mixing between $Z'$ and $A'$ fields. The predictions of the models for the search for dark matter at the accelerators don't contain additional suppression factors.