A new determination of the electroweak mixing angle from muon-neutrino-electron scattering

We consider the sensitivity of the DUNE experiment to a heavy neutral lepton, HNL (also known as sterile neutrino) in the mass range from a few MeV to a few GeV, interacting with the Standard Model via a transition magnetic moment to the active neutrinos, the so-called dipole portal. The HNL is produced via the up-scattering of active neutrinos, and the subsequent decay inside the detector provides a single-photon signal. We show that the tau-neutrino dipole portal can be efficiently probed at the DUNE far detector, using the tau-neutrino flux generated by neutrino oscillations, while the near detector provides better sensitivity to the electron- and muon-neutrino dipole portal. DUNE will be able to explore large regions of currently unconstrained parameter space and has comparable sensitivity to other planned dedicated experiments, such as SHiP. We also comment briefly on the sensitivity to pure HNL mixing with the tau neutrino at the DUNE far detector.

Section: Global Picturementioning

confidence: 99%

“…L . [7,46], NOMAD [1,47], Icecube [7], solar neutrinos [3,6], MiniBooNE, SHiP, LEP, SN 1987A [1], Xenon1T, BBN 4 He abundance [3], SuperCDMS [4].…”

Section: Jhep07(2021)200mentioning

confidence: 99%

See 1 more Smart Citation

Constraining active-sterile neutrino transition magnetic moments at DUNE near and far detectors

Schwetz

Zhou

Zhu

2021

“…The red line is a part of the contour corresponding to the 90% favored region at ICeCube [48]. The green and black dashed lines are exclusion curves obtained from MiniBooNE [28,49] and CHARM-II [50].…”

Section: Resultsmentioning

confidence: 99%

Probing neutrino dipole portal at COHERENT experiment

Dasgupta

Kang

Kim

2021

Motivated by the first observation of coherent-elastic neutrino-nucleus scattering at the COHERENT experiment, we confront the neutrino dipole portal giving rise to the transition of the standard model neutrinos to sterile neutrinos with the recently released CENNS 10 data from the liquid argon as well as the CsI data of the COHERENT experiment. Performing a statistical analysis of those data, we show how the transition magnetic moment can be constrained for the range of the sterile neutrino mass between 10 keV and 40 MeV.

“…In the plots, the gray-shaded region corresponds to the current experimental bounds. The dominant such bounds come from null searches in the CHARM-II [83], MiniBooNE [71] and NOMAD [84] experiments, as well as from the LEP search for the γ + / E T signature [85]. For light and very weakly coupled HNLs, the cosmological and astrophysical constraints from the Big Bang Nucleosynthesis (BBN) and observations of Supernova SN1987A become important.…”

Section: Turning Neutrinos Into Light With Neutrino Dipole Portal To Hnlsmentioning

confidence: 99%

Neutrino beam-dump experiment with FASER at the LHC

Jodłowski

Trojanowski

2021

The neutrino physics program at the LHC, which will soon be initiated by the FASER experiment, will provide unique opportunities for precision studies of neutrino interaction vertices at high energies. This will also open up the possibility to search for beyond the standard model (BSM) particles produced in such interactions in the specific high-energy neutrino beam-dump experiment. In this study, we illustrate the prospects for such searches in models with the dipole or Z′ portal to GeV-scale heavy neutral leptons. To this end, we employ both the standard signature of new physics that consists of a pair of oppositely-charged tracks appearing in the decay vessel, and the additional types of searches. These include high-energy photons and single scattered electrons. We show that such a variety of experimental signatures could significantly extend the sensitivity reach of the future multi-purpose FASER 2 detector during the High-Luminosity phase of the LHC.