Charge and magnetic moment of the neutrino in the background field method and in the linear R-xi(L) gauge

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Charge and magnetic moment of the neutrino in the background field method and in the linear R-xi(L) gauge

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	Cabral Rosetti, Luis Gustavo; Bernabeu Alberola, José Perfil; Vidal Perona, Jorge Perfil; Zepeda, A.
	This document is a artículoDate2000
	Este documento está disponible también en : http://dx.doi.org/10.1007/s100520000304
	Este documento está disponible también en : http://hdl.handle.net/10550/32619
	We present a computation of the charge and the magnetic moment of the neutrino in the recently developed electro-weak Background Field Method and in the linear R-xi(L) gauge. First, we deduce a formal Ward-Takahashi identity which implies the immediate cancellation of the neutrino electric charge. This Ward-Takahashi identity is as simple as that for QED. The computation of the (proper and improper) one loop vertex diagrams contributing to the neutrino electric charge is also presented in an arbitrary gauge, checking in this way the Ward-Takahashi identity previously obtained. Finally, the calculation of the magnetic moment of the neutrino, in the minimal extension of the Standard Model with massive Dirac neutrinos, is presented, showing: its gauge parameter and gauge structure independence explicitly.
	Cabral Rosetti, Luis Gustavo; Bernabeu Alberola, José; Vidal Perona, Jorge; Zepeda, A. (2000) Charge and magnetic moment of the neutrino in the background field method and in the linear R-xi(L) gauge European Physical Journal C 12 4 633 642
	http://dx.doi.org/10.1007/s100520000304

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