Tue·May 17, 2016Tuesday·May 17, 2016

1. 01*

   Electrophobic Scalar Boson and Muonic Puzzles

   Yu-Sheng Liu🇺🇸 · David McKeen🇺🇸 · Gerald A. Miller🇺🇸

   A new scalar boson which couples to the muon and proton can simultaneously solve the proton radius puzzle and the muon anomalous magnetic moment discrepancy. Using a variety of measurements, we constrain the mass of this scalar and its couplings to the electron, muon, neutron, and proton. Making no assumptions about the underlying model, these constraints and the requirement that it solve both problems limit the mass of the scalar to between about 100 keV and 100 MeV. We identify two unexplored regions in the coupling constant-mass plane. Potential future experiments and their implications for theories with mass-weighted lepton couplings are discussed.

   ↳ hep-phhep-exnucl-exnucl-th+1PRL(2016)·75 citations
2. 02*

   Discrimination of nuclear and electronic recoil events using plasma effect in germanium detectors

   W.-Z. Wei🇺🇸 · J. Liu🇺🇸 · D.-M. Mei🇺🇸

   We report a new method of using the plasma time difference, which results from the plasma effect, between the nuclear and electronic recoil events in high-purity germanium detectors to distinguish these two types of events in the search for rare physics processes. The physics mechanism of the plasma effect is discussed in detail. A numerical model is developed to calculate the plasma time for nuclear and electronic recoils at various energies in germanium detectors. It can be shown that under certain conditions the plasma time difference is large enough to be observable. The experimental aspects in realizing such a discrimination in germanium detectors is discussed.

   ↳ physics.ins-detnucl-exJINST(2016)·1 citation

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.