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Charge radius of the neutrino

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Charge radius of the neutrino

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dc.contributor.author	Bernabeu Alberola, José
dc.contributor.author	Cabral Rosetti, Luis Gustavo
dc.contributor.author	Papavassiliou, Joannis
dc.contributor.author	Vidal Perona, Jorge
dc.date.accessioned	2014-01-17T12:37:59Z
dc.date.available	2014-01-17T12:37:59Z
dc.date.issued	2000
dc.identifier.citation	Bernabeu Alberola, José; Cabral Rosetti, Luis Gustavo; Papavassiliou, Joannis; Vidal Perona, Jorge (2000) Charge radius of the neutrino Physical Review D 62 11 113012 11301219
dc.identifier.uri	http://hdl.handle.net/10550/32374
dc.description.abstract	Using the pinch technique we construct at one-loop order a neutrino charge radius, which is finite, depends neither on the gauge-fixing parameter nor on the gauge-fixing scheme employed, and is process independent. This definition stems solely from an effective proper photon-neutrino one-loop vertex, with no reference to box or self-energy contributions. The role of the WW box in this construction is critically examined. In particular it is shown that the exclusion of the effective WW box from the definition of the neutrino charge radius is not a matter of convention but is in fact dynamically realized when the target fermions are right-handedly polarized. In this way we obtain a unique decomposition of effective self-energies, vertices, and boxes, which separately respect electroweak gauge invariance. We elaborate on the tree-level origin of the mechanism which enforces at the one-loop level massive cancellations among the longitudinal momenta appearing in the Feynman diagrams, and in particular those associated with the non-Abelian character of the theory. Various issues related to the known connection between the pinch technique and the background field method are further clarified. Explicit closed expressions for the neutrino charge radius are reported.
dc.relation.ispartof	Physical Review D, 2000, vol. 62, num. 11, p. 113012-11301219
dc.subject	Camps, Teoria quàntica de
dc.subject	Camps de galga (Física)
dc.title	Charge radius of the neutrino
dc.type	journal article	es_ES
dc.date.updated	2014-01-17T12:37:59Z
dc.identifier.doi	10.1103/PhysRevD.62.113012
dc.identifier.idgrec	069015
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1103/PhysRevD.62.113012