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A model of CPT violation for neutrinos

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	Barenboim Szuchman, Gabriela Alejandra Perfil; Lykken, Joseph
	This document is a artículoDate2003
	Este documento está disponible también en : http://hdl.handle.net/10550/43445
	Any local relativistic quantum field theory of Dirac-Weyl fermions conserves CPT. Here we examine whether a simple nonlocal field theory can violate CPT. We construct a new relativistic field theory of fermions, which we call ``homeotic'', which is nonlocal but causal and Lorentz invariant. The free homeotic theory is in fact equivalent to free Dirac theory. We show that a homeotic theory with a suitable nonlocal four-fermion interaction is causal and as a result has a well-defined perturbative S-matrix. By coupling a right-handed homeotic fermion to a left-handed Dirac-Weyl fermion, we obtain a causal theory of CPT-violating neutrino oscillations.
	Barenboim Szuchman, Gabriela Alejandra Lykken, Joseph 2003 A model of CPT violation for neutrinos Physics Letters B 554 1-2 73 80
	http://dx.doi.org/10.1016/S0370-2693(02)03262-8