Abstract
This work presents a sensitivity study of a reactor liquid scintillator detector to three kinds of dark bosons with masses below 1 MeV, such as dark photons, axion-like particles and light scalar bosons. The JUNO-TAO detector with Taishan nuclear reactor is taken as a reference. With proposed 180 days data taking, the sensitivity to the dark bosons can reach $\sim10^{-5}$ 95%C.L. for the optimized signal to background ratio for the electron coupling constant $\it{g_X} $ through inverse Compton-like scattering. Similar calculations are completed for axion-like particles and scalar bosons. The background systematic uncertainty presents as the main limiting factor for the further sensitivity improvement. Several remarks are made to the controversial analysis for the NEOS experiment. Additionally the differential and the inverse differential cross sections have been derived for all three boson types and their interactions with electrons in liquid scintillator.
Highlights
Neutrino experiments have provided us a lot of information about the Standard Model (SM) and the physics beyond it
One of the purposes of this paper is to provide a direct comparison with the controversial result of searching for dark photon (DP) with the NEOS detector [44]
Having presented the particle source and detector in the previous section, we summarize the parameters of the experimental setup in Table I and move on to the dark boson production and detection rates
Summary
Neutrino experiments have provided us a lot of information about the Standard Model (SM) and the physics beyond it. Experiments such as NEOS [5], DANSS [6], STEREO [7], PROSPECT [8], Neutrino-4 [9] and SoLid [10] aim to search for sterile neutrinos These experiments have a short baseline (usually a few tens of meters) to the neutrino source in order to measure the distortion of the antineutrino energy spectrum due to the possible existence of sterile neutrinos. Such experiments can be used to search for popular candidates of dark matter. A description of the theoretical scattering processes of hypothetical particles is presented, followed by an introduction to the experimental setup, an analysis framework description and results with discussions
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