Cosmological lepton asymmetry with a nonzero mixing angle θ13
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Cosmological lepton asymmetry with a nonzero mixing angle θ13

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Cosmological lepton asymmetry with a nonzero mixing angle θ13

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dc.contributor.author Castorina, Emanuele
dc.contributor.author França, Urbano Junior Lopes
dc.contributor.author Lattanzi, Massimiliano
dc.contributor.author Lesgourgues, Julien
dc.contributor.author Mangano, Gianpiero
dc.contributor.author Melchiorri, Alessandro
dc.contributor.author Pastor Carpi, Sergio
dc.date.accessioned 2013-11-25T12:06:04Z
dc.date.available 2013-11-25T12:06:04Z
dc.date.issued 2012
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevD.86.023517
dc.identifier.uri http://hdl.handle.net/10550/31409
dc.description.abstract While the baryon asymmetry of the Universe is nowadays well measured by cosmological observations, the bounds on the lepton asymmetry in the form of neutrinos are still significantly weaker. We place limits on the relic neutrino asymmetries using some of the latest cosmological data, taking into account the effect of flavor oscillations. We present our results for two different values of the neutrino mixing angle theta13, and show that for large theta13 the limits on the total neutrino asymmetry become more stringent, diluting even large initial flavor asymmetries. In particular, we find that the present bounds are still dominated by the limits coming from Big Bang Nucleosynthesis, while the limits on the total neutrino mass from cosmological data are essentially independent of theta13. Finally, we perform a forecast for COrE, taken as an example of a future CMB experiment, and find that it could improve the limits on the total lepton asymmetry approximately by up to a factor 6.6.
dc.relation.ispartof Physical Review D, 2012, vol. 86, p. 023517-1-023517-11
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Castorina, Emanuele França, Urbano Lattanzi, Massimiliano Lesgourgues, Julien Mangano, Gianpiero Melchiorri, Alessandro Pastor Carpi, Sergio 2012 Cosmological lepton asymmetry with a nonzero mixing angle θ13 Physical Review D 86 023517-1 023517-11
dc.subject Partícules (Física nuclear)
dc.title Cosmological lepton asymmetry with a nonzero mixing angle θ13
dc.type info:eu-repo/semantics/article
dc.date.updated 2013-11-25T12:06:04Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.86.023517
dc.identifier.idgrec 078922

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