Constraining self-interacting dark matter with the full dataset of PandaX-II
被引量：1
摘要
Self-interacting dark matter(SIDM)is a leading candidate proposed to solve discrepancies between predictions of the prevailing cold dark matter theory and observations of galaxies.Many SIDM models predict the existence of a light force carrier that mediates strong dark matter self-interactions.If the mediator couples to the standard model particles,it could produce characteristic signals in dark matter direct detection experiments.We report searches for signals of SIDM models with a light mediator using the full dataset of the PandaX-II experiment,basing on a total exposure of 132 tonne-days.No significant excess over background is found,and our likelihood analysis leads to a strong upper limit on the dark matter-nucleon coupling strength.We further combine the PandaX-II constraints and those from observations of the light element abundances in the early universe,and show that direct detection and cosmological probes can provide complementary constraints on dark matter models with a light mediator.
基金
This work was supported by a Double Top-class grant from Shanghai Jiao Tong University,and the National Natural Science Foundation of China(Grant No.11875190)
Department of Energy(Grant No.de-sc0008541)
the John Templeton Foundation(Grant No.#61884).
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