Speaker
Description
FASER is an experiment at the LHC designed to search for light, feebly-interacting particles produced in proton-proton collisions at the ATLAS interaction point that travel in the far forward direction.
In this talk, we will present new results at FASER about a search for dark photons decaying to electron-positron pairs using 177 fb^{−1} dataset, which is 6.5 times more than that used for previous dark photon analysis. Moreover, we will focus on the optimized analysis strategies resulting in tripled sensitivity to dark photons compared to previous analysis. In this analysis, FASER sets new world-leading constraints for dark photons. Specifically, FASER excluded parts of dark photon parameter space where the dark photons have a mass between 10 and 150 MeV and a coupling between 10^{-5} and 10^{-4}. This rules out a significant area of cosmologically-viable parameter space, where dark sector particles could be responsible for the relic density of dark matter we see in the universe today.
| 请选择分会 | TeV物理和超出标准模型新物理 |
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