On the nature of the fourth generation neutrino and its implications
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On the nature of the fourth generation neutrino and its implications

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On the nature of the fourth generation neutrino and its implications

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dc.contributor.author Aparici Benages, Alberto
dc.contributor.author Herrero García, Juan Andrés
dc.contributor.author Rius Dionis, Nuria
dc.contributor.author Santamaria, Arcadi
dc.date.accessioned 2015-03-03T08:09:31Z
dc.date.available 2015-03-03T08:09:31Z
dc.date.issued 2012
dc.identifier.uri http://hdl.handle.net/10550/42567
dc.description.abstract We consider the neutrino sector of a Standard Model with four generations. While the three light neutrinos can obtain their masses from a variety of mechanisms with or without new neutral fermions, fourth-generation neutrinos need at least one new relatively light right-handed neutrino. If lepton number is not conserved this neutrino must have a Majorana mass term whose size depends on the underlying mechanism for lepton number violation. Majorana masses for the fourth-generation neutrinos induce relative large two-loop contributions to the light neutrino masses which could be even larger than the cosmological bounds. This sets strong limits on the mass parameters and mixings of the fourth-generation neutrinos.
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics, 2012, vol. 07, num. 7, p. 030-1-030-31
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Aparici Benages, Alberto; Herrero García, Juan Andrés; Rius Dionis, Nuria; Santamaria, Arcadi (2012) On the nature of the fourth generation neutrino and its implications Journal of High Energy Physics 07 7 030-1 030-31
dc.subject Física
dc.title On the nature of the fourth generation neutrino and its implications
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-03-03T08:09:32Z
dc.identifier.doi http://dx.doi.org/10.1007/JHEP07(2012)030
dc.identifier.idgrec 080215

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