Collider constraints on a dark matter interpretation of the XENON1T excess
Reinard Primulando, J. Julio, Patipan Uttayarat
Abstract
Abstract In light of the excess in the low-energy electron recoil events reported by XENON1T, many new physics scenarios have been proposed as a possible origin of the excess. One possible explanation is that the excess is a result of a fast moving dark matter (DM), with velocity $$v\sim $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>v</mml:mi><mml:mo>∼</mml:mo></mml:mrow></mml:math> 0.05–0.20 and mass between 1 MeV and 10 GeV, scattering off an electron. Assuming the fast moving DM-electron interaction is mediated by a vector particle, we derive collider constraints on the said DM-electron interaction. The bounds on DM-electron coupling is then used to constrain possible production mechanisms of the fast moving DM. We find that the preferred mass of the vector mediator is relatively light ( $$\lesssim $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>≲</mml:mo></mml:math> 1 GeV) and the coupling of the vector to the electron is much smaller than the coupling to the fast moving DM.