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Dark energy and neutrino CPT-violation
Authors:Pei-Hong Gu  Xiao-Jun Bi  Xinmin Zhang
Institution:(1) Theoretical Physics Division, IHEP, Chinese Academy of Sciences, Beijing, 100049, P.R. China;(2) Key Laboratory of Particle Astrophysics, IHEP, Chinese Academy of Sciences, Beijing, 100049, P.R. China
Abstract:In this paper we study dynamical CPT-violation in the neutrino sector as induced by the dark energy of the universe. Specifically we consider a dark energy model where the dark energy scalar derivatively interacts with the right-handed neutrinos. This type of derivative coupling leads to cosmological CPT-violation during the evolution of the background field of the dark energy. We calculate the induced CPT-violation of left-handed neutrinos and find that the CPT-violation produced in this way is consistent with the present experimental limit and sensitive to future neutrino oscillation experiments such as the neutrino factory. PACS 95.36.+x; 14.60.St
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