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SUMMARY:Seminar #8: Elena Abad Diaz\, "Study of Quasi-Dirac Neutrinos in S
 olar Experiments"
DTSTART:20260218T091500Z
DTEND:20260218T101500Z
DTSTAMP:20260405T082500Z
UID:indico-event-17141@indico.global
CONTACT:Manojit.Ghosh@irb.hr
DESCRIPTION:Speakers: Elena Diaz\n\nAbstract: Neutrino oscillations provid
 e clear evidence that neutrinos are massive particles\, but the nature of 
 their mass term remains unknown. In this work\, we study the quasi-Dirac n
 eutrino scenario\, in which neutrinos have a dominant Dirac mass with smal
 l Majorana contributions\, leading to pairs of nearly degenerate mass eige
 nstates and tiny mass splittings. These splittings introduce oscillations 
 between active and sterile neutrinos\, which can modify neutrino oscillati
 on patterns. Solar neutrinos are sensitive to this scenario due to their l
 ong propagation distance. We analyze solar neutrino data reported by the S
 uper-Kamiokande and Borexino experiments\, comparing quasi-Dirac predictio
 ns with current experimental data through a statistical analysis. Our resu
 lts constrain the mass splittings to be below 10⁻¹¹ eV² and show that
  current solar neutrino data cannot discriminate between these quasi-Dirac
  solutions and the standard neutrino oscillation framework. We briefly dis
 cuss new approaches to test this scenario.\n\nhttps://indico.global/event/
 17141/
LOCATION:Lecture Hall (1st Wing)
URL:https://indico.global/event/17141/
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