Testing Lorentz invariance with neutrinos

  • Event Date: 2016-10-13
  • Particle/String/Cosmology
  • Speaker: Yuan-Tang Chou (student's Journal Club)  /  Host: Prof. Pai-hsien Jennifer Hsu (NTHU) and Prof. G. L. Lin (NCTU)
    Place: R521, 2nd General Building 5F, Nat'l Tsing Hua Univ.


Abstract:

A search for neutrino oscillations induced by Lorentz violation has been performed using 4,438 livedays
of Super-Kamiokande atmospheric neutrino data. The Lorentz violation is included in addition to
standard three-flavor oscillations using the nonperturbative standard model extension (SME), allowing
the use of the full range of neutrino path lengths, ranging from 15 to 12,800 km, and energies ranging
from 100 MeV to more than 100 TeV in the search. No evidence of Lorentz violation was observed, so
limits are set on the renormalizable isotropic SME coefficients in the eμ, μτ, and eτ sectors, improving the
existing limits by up to 7 orders of magnitude and setting limits for the first time in the neutrino μτ sector
of the SME.

 

 

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