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Full-Text Articles in Physics
Consequences Of Neutrino Lorentz Violation For Leptonic Meson Decays, Brett David Altschul
Consequences Of Neutrino Lorentz Violation For Leptonic Meson Decays, Brett David Altschul
Faculty Publications
If the observation by OPERA of apparently superluminal neutrinos is correct, the Lagrangian for second-generation leptons must break Lorentz invariance. We calculate the effects of an energy-independent change in the neutrino speed on another observable, the charged pion decay rate. The rate decreases by an factor [1 - 3/(1 - (m_mu)^2 / (m_pi) ^ 2) (< v_(nu) > - 1)], where < v_(nu) > is the (directionally averaged) neutrino speed in the pion's rest frame. This provides a completely independent experimental observable that is sensitive to the same forms of Lorentz violation as a neutrino time of flight measurement.
Bounding Lorentz Violation At Particle Colliders By Tracking The Motion Of Charged Particles, Brett David Altschul
Bounding Lorentz Violation At Particle Colliders By Tracking The Motion Of Charged Particles, Brett David Altschul
Faculty Publications
In the presence of Lorentz violation, the motion of a charged particle in a magnetic field is distorted. By measuring the eccentricities of particles’ elliptical orbits and studying how those eccentricities vary with the absolute orientation of the laboratory, it is possible to constrain the Lorentz-violating cJK parameters. For each observed species, this method can provide constraints on four linear combinations of coefficients for which, in some species, there are presently no two-sided bounds.