Kevin J. Kelly

Non-standard neutrino interactions at DUNE

We explore the effects of non-standard neutrino interactions (NSI) and how they modify neutrino propagation in the Deep Underground Neutrino Experiment (DUNE). We find that NSI can significantly modify the data to be collected by the DUNE experiment as long as the new physics parameters are large enough. For example, if the DUNE data are consistent with the standard three-massive-neutrinos paradigm, order 0.1 (in units of the Fermi constant) NSI effects will be ruled out. On the other hand, if large NSI effects are present, DUNE will be able to not only rule out the standard paradigm but also measure the new physics parameters, sometimes with good precision. We find that, in some cases, DUNE is sensitive to new sources of CP-invariance violation. We also explored whether DUNE data can be used to distinguish different types of new physics beyond nonzero neutrino masses. In more detail, we asked whether NSI can be mimicked, as far as the DUNE setup is concerned, by the hypothesis that there is a new light neutrino state.

Sterile neutrino at the Deep Underground Neutrino Experiment

We investigate the potential for the Deep Underground Neutrino Experiment (DUNE) to probe the existence and effects of a fourth neutrino mass-eigenstate. We study the mixing of the fourth mass-eigenstate with the three active neutrinos of the Standard Model, including the effects of new sources of CP -invariance violation, for a wide range of new mass-squared differences, from lower than 10−5 eV to higher than 1 eV. DUNE is sensitive to previously unexplored regions of the mixing angle – mass-squared difference parameter space. If there is a fourth neutrino, in some regions of the parameter space, DUNE is able to measure the new oscillation parameters (some very precisely) and clearly identify two independent sources of CP -invariance violation. Finally, we use the hypothesis that there are four neutrino mass-eigenstates in order to ascertain how well DUNE can test the limits of the three-massive-neutrinos paradigm. In this way, we briefly explore whether light sterile neutrinos can serve as proxies for other, in principle unknown, phenomena that might manifest themselves in long-baseline neutrino oscillation experiments.

Large, Extra Dimensions at the Deep Underground Neutrino Experiment

We investigate the potential of the long-baseline Deep Underground Neutrino Experiment (DUNE) to study large-extra-dimension (LED) models originally proposed to explain the smallness of neutrino masses by postulating that right-handed neutrinos, unlike all standard model fermion fields, can propagate in the bulk. The massive Kaluza-Klein (KK) modes of the right-handed neutrino fields modify the neutrino oscillation probabilities and can hence affect their propagation. We show that, as far as DUNE is concerned, the LED model is indistinguishable from a (

CP -invariance violation at short-baseline experiments in 3+1 neutrino scenarios

3+3N

Searches for new physics at the Hyper-Kamiokande experiment

)-neutrino framework for modest values of

Lepton-number-violating searches for muon to positron conversion

N

Neutrino versus antineutrino oscillation parameters at DUNE and Hyper-Kamiokande experiments

;

Dark matter and neutrino mass from the smallest non-Abelian chiral dark sector

N=1

Imperfect mirror copies of the standard model

is usually a very good approximation. Nonetheless, there are no new sources of

Lepton-Number-Charged Scalars and Neutrino Beamstrahlung

CP