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June 22, 2020 to July 2, 2020
US/Central timezone

Heavy Sterile Neutrino Decay at Short-Baseline Experiments

Not scheduled
10m

Speaker

Gabriela Vitti Stenico (Campinas State University)

Description

We studied a neutrino decay scenario as a potential solution to conciliate the tension between appearance and disappearance data at the short-baseline experiments. Particularly, we considered a heavy neutrino mass-eigenstate that decays into a usual light neutrino plus a massless scalar. Under this neutrino decay hypothesis, we fitted LSND and MiniBooNE electron neutrino appearance data assuming Dirac or Majorana neutrinos. We obtained reasonable results for both cases. Including muon neutrino disappearance searches, and also current bounds on the new decay coupling constant, we noticed that the heavy neutrino decay scenario is compatible as long as 1 MeV $\geq m_4 \geq$ 10 keV. Finally, we showed that the future SBN program at Fermilab has the potential to definitively test the considered decay hypothesis.

Mini-abstract

Neutrino decay as an alternative to explain short-baseline experiment results.

Primary authors

Prof. Andre de Gouvea (Northwestern University) Gabriela Vitti Stenico (Campinas State University) Prof. Orlando Luis Goulart Peres (UNICAMP) Dr Suprabh Prakash (Instituto de Fisica - Gleb Wataghin, UNICAMP)

Presentation Materials