Identifying the neutrino mass hierarchy with supernova neutrinos

Details Identifying the neutrino mass hierarchy with supernova neutrinos Identifying the neutrino mass hierarchy with supernova neutrinos

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jphcs..39..297t&link_type=abstract

Journal of Physics: Conference Series, Volume 39, Issue 1, pp. 297-299 (2006).

Physics

Scientific paper

We review how a high-statistics observation of the neutrino signal from a future galactic core-collapse supernova (SN) may be used to discriminate between different neutrino mixing scenarios. We discuss two complementary methods that allow for the positive identification of the mass hierarchy without knowledge of the emitted neutrino fluxes, provided that the 13-mixing angle is large, sin2 θ13 ≫ 10-5. These two approaches are the observation of modulations in the neutrino spectra by Earth matter effects or by the passage of shock waves through the SN envelope. If the value of the 13-mixing angle is unknown, using additionally the information encoded in the prompt neutronization νe burst -- a robust feature found in all modern SN simulations -- can be sufficient to fix both the neutrino hierarchy and to decide whether θ13 is ''small'' or ''large.''

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