Mono-γ production of a dark vector at future e ⁺ e ⁻ colliders*

Abstract

Associated production of a dark particle and a photon, represented as a mono-$\gamma$ event, is a promising channel to probe particle contents and dynamics in the dark sector. In this paper we study properties of the mono-$\gamma$ production of a vector dark matter at future $e^+e^-$ colliders. The photon-like and Pauli operators, as well as triple gauge bosons interactions involving the dark matter, are considered in the framework of Effective Field Theory. We show that, comparing to the Pauli operator, the triple gauge bosons couplings are much more interesting at high energy collider. Beam polarization effects are also analyzed, and we show that the experimental sensitivities can not be enhanced significantly because of the smaller luminosity. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

Effective Leptophilic WIMPs at the e+e− collider

“…Mono-X, (X ∈ γ, j, Z, H) plus missing energy ( / E) final state is one of the popular probes to search for DM at colliders. The signal of our interest is mono-γ, which has been studied widely at the lepton colliders [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Noticeably, this final state with ISR photon has similar / E event distribution to the huge SM neutrino background (ν νγ), making it difficult for signal-background separation (see supplemental material).…”