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Systematic classification of two-loop realizations of the Weinberg operator

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Systematic classification of two-loop realizations of the Weinberg operator

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dc.contributor.author Aristizábal Sierra, Diego
dc.contributor.author Degee, Audrey
dc.contributor.author Dorame, Luis
dc.contributor.author Hirsch, Martin
dc.date.accessioned 2015-04-20T10:28:27Z
dc.date.available 2015-04-20T10:28:27Z
dc.date.issued 2015
dc.identifier.citation Aristizabal Sierra, D. Degee, Audrey Dorame, Luis Hirsch, Martin 2015 Systematic classification of two-loop realizations of the Weinberg operator Journal Of High Energy Physics 03 3 040-1 040-41
dc.identifier.uri http://hdl.handle.net/10550/43232
dc.description.abstract We systematically analyze the d = 5 Weinberg operator at 2-loop order. Using a diagrammatic approach, we identify two different interesting categories of neutrino mass models: (i) Genuine 2-loop models for which both, tree-level and 1-loop contributions, are guaranteed to be absent. And (ii) finite 2-loop diagrams, which correspond to the 1-loop generation of some particular vertex appearing in a given 1-loop neutrino mass model, thus being effectively 2-loop. From the large list of all possible 2-loop diagrams, the vast majority are infinite corrections to lower order neutrino mass models and only a moderately small number of diagrams fall into these two interesting classes. Moreover, all diagrams in class (i) are just variations of three basic diagrams, with examples discussed in the literature before. Similarly, we also show that class (ii) diagrams consists of only variations of these three plus two more basic diagrams. Finally, we show how our results can be consistently and readily used in order to construct two-loop neutrino mass models.
dc.language.iso eng
dc.relation.ispartof Journal Of High Energy Physics, 2015, vol. 03, num. 3, p. 040-1-040-41
dc.subject Física
dc.title Systematic classification of two-loop realizations of the Weinberg operator
dc.type journal article es_ES
dc.date.updated 2015-04-20T10:28:27Z
dc.identifier.doi 10.1007/JHEP03(2015)040
dc.identifier.idgrec 102201
dc.rights.accessRights open access es_ES

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