A model-independent analysis of leptophilic dark matter at future electron-positron colliders in the mono-photon and mono-Z channels. (arXiv:2110.06903v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Kundu_S/0/1/0/all/0/1">Saumyen Kundu</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Guha_A/0/1/0/all/0/1">Atanu Guha</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Das_P/0/1/0/all/0/1">Prasanta Kumar Das</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Dev_P/0/1/0/all/0/1">P. S. Bhupal Dev</a>

We consider the possibility that dark matter (DM) only interacts with the
Standard Model leptons, but not quarks at tree-level, and analyze the future
lepton collider prospects of such leptophilic DM in the mono-photon and
mono-$Z$ (both leptonic and hadronic) channels. Adopting a model-independent
effective field theory framework, we consider all possible dimension-6
operators of scalar-pseudoscalar (S-P), vector-axialvector (V-A) and
tensor-axialtensor (T-AT) types for a fermionic DM and derive the collider
sensitivities on the effective cut-off 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 $3sigma$ level up to $Lambda$ values of 4.8
TeV, 6.5 TeV and 5.3 TeV for the S-P, V-A and T-AT type operators respectively.
This is largely complementary to the direct and indirect searches for
leptophilic DM, and can potentially provide the best-ever sensitivity in the
low-mass DM regime.

We consider the possibility that dark matter (DM) only interacts with the
Standard Model leptons, but not quarks at tree-level, and analyze the future
lepton collider prospects of such leptophilic DM in the mono-photon and
mono-$Z$ (both leptonic and hadronic) channels. Adopting a model-independent
effective field theory framework, we consider all possible dimension-6
operators of scalar-pseudoscalar (S-P), vector-axialvector (V-A) and
tensor-axialtensor (T-AT) types for a fermionic DM and derive the collider
sensitivities on the effective cut-off 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 $3sigma$ level up to $Lambda$ values of 4.8
TeV, 6.5 TeV and 5.3 TeV for the S-P, V-A and T-AT type operators respectively.
This is largely complementary to the direct and indirect searches for
leptophilic DM, and can potentially provide the best-ever sensitivity in the
low-mass DM regime.

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