A modelindependent analysis of leptophilic dark matter at future electronpositron colliders in the monophoton and monoZ channels
Abstract
We consider the possibility that dark matter (DM) only interacts with the Standard Model leptons, but not quarks at treelevel, and analyze the future lepton collider prospects of such leptophilic DM in the monophoton and mono$Z$ (both leptonic and hadronic) channels. Adopting a modelindependent effective field theory framework, we consider all possible dimension6 operators of scalarpseudoscalar (SP), vectoraxialvector (VA) and tensoraxialtensor (TAT) types for a fermionic DM and derive the collider sensitivities on the effective cutoff scale $\Lambda$ as a function of the DM mass. As a concrete example, we take the beam configurations of the International Linear Collider with $\sqrt s=1$ TeV and 1000 fb$^{1}$ integrated luminosity, including the effect of beam polarization, and show that it can probe leptophilic DM at $3\sigma$ level up to $\Lambda$ values of 4.8 TeV, 6.5 TeV and 5.3 TeV for the SP, VA and TAT type operators respectively. This is largely complementary to the direct and indirect searches for leptophilic DM, and can potentially provide the bestever sensitivity in the lowmass DM regime.
 Publication:

arXiv eprints
 Pub Date:
 October 2021
 arXiv:
 arXiv:2110.06903
 Bibcode:
 2021arXiv211006903K
 Keywords:

 High Energy Physics  Phenomenology;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 High Energy Physics  Experiment
 EPrint:
 51 pages, 19 figures, 16 tables