Abstract
We set constraints and future sensitivity projections on millicharged particles (MCPs) based on electron scattering data in numerous neutrino experiments, starting with MiniBooNE and the Liquid Scintillator Neutrino Detector (LSND). Both experiments are found to provide new (and leading) constraints in certain MCP mass windows: 5-35MeV for LSND and 100-180MeV for MiniBooNE. Furthermore, we provide projections for the ongoing Fermilab SBN program, the Deep Underground Neutrino Experiment (DUNE), and the proposed Search for Hidden Particles (SHIP) experiment. In the SBN program, SBND and MicroBooNE have the capacity to provide the leading bounds in the 100-300MeV mass regime. DUNE and SHIP are capable of probing parameter space for MCP masses in the range of 5 MeV-5 GeV that is significantly beyond the reach of existing bounds, including those from collider searches and, in the case of DUNE, the SLAC mQ experiment.
Highlights
We set constraints and future sensitivity projections on millicharged particles (MCPs) based on electron scattering data in numerous neutrino experiments, starting with MiniBooNE and the Liquid Scintillator Neutrino Detector (LSND)
We provide projections for the ongoing Fermilab SBN program, the Deep Underground Neutrino Experiment (DUNE), and the proposed Search for Hidden Particles (SHIP) experiment
One of the simplest and most natural ways of coupling new particles to the standard model (SM) is via a “kinetic mixing” or “hypercharge portal” [2,3], which at low energies may lead to millicharged particles (MCPs) that would seemingly contradict the observed quantization of electric charge in nature [4]
Summary
Gabriel Magill,1,2,† Ryan Plestid,1,2,‡ Maxim Pospelov,1,3,4,§ and Yu-Dai Tsai5,*. We set constraints and future sensitivity projections on millicharged particles (MCPs) based on electron scattering data in numerous neutrino experiments, starting with MiniBooNE and the Liquid Scintillator Neutrino Detector (LSND). Fixed target neutrino experiments, such as the existing data from MiniBooNE [24] and the Liquid Scintillator Neutrino Detector (LSND) [25], and the soon to be released data from MicroBooNE, the ongoing SBN program [26], the Deep Underground Neutrino Experiment (DUNE) [27], and the proposed search for hidden particles (SHIP) [28] serve as a fertile testing ground of MeV–GeV physics due to their high statistics [10,13,29,30] These experiments all serve as promising avenues to probe MCPs. The purpose of this Letter is twofold.
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