Tuesday, February 12, 2013

1302.2598 (Brett Altschul)

Neutrino Beam Constraints on Flavor-Diagonal Lorentz Violation    [PDF]

Brett Altschul
Breaking of isotropy and Lorentz boost invariance in the dynamics of second-generation leptons would lead to direction-dependent changes in the lifetimes of charged pions. This would make the intensity of a neutrino beam produced via pion decay a function of the beam orientation. The experimental signature of this phenomenon--sidereal variations in the event rate at a downstream neutrino detector--has already been studied, in searches for Lorentz-violating neutrino oscillations. Existing analyses of MINOS near detector data can be used to constrain the flavor-diagonal Lorentz violation coefficients affecting muon neutrino speeds at roughly the 10^(-5) level.
View original: http://arxiv.org/abs/1302.2598

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