A 3x2 texture for neutrino oscillations and leptogenesis

dc.contributor.authorBrahmachari, Biswajoy
dc.contributor.authorOkada, Nobuchika
dc.contributor.otherHigh Energy Accelerator Research Organization (KEK)
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-06-04T21:28:40Z
dc.date.available2019-06-04T21:28:40Z
dc.date.copyright2008
dc.date.issued2008-03-06
dc.description.abstractIn an economical system with only two heavy right-handed neutrinos, we postulate a new texture for 3 x 2 Dirac mass matrix m(D). This model implies one massless light neutrino and thus displays only two patterns of mass spectrum for light neutrinos, namely hierarchical or inverse-hierarchical. Both the cases can correctly reproduce all the current neutrino oscillation data with a unique prediction m(nu e nu e) = root Delta m(solar)(2)/3 and root Delta(2)(atm) for the hierarchical and the inverse-hierarchical cases, respectively, which can be tested in next generation neutrino-less double beta decay experiments. Introducing a single physical CP phase in in m(D), we examine baryon asymmetry through leptogenesis. Interestingly, through the CP phase there are correlations between the amount of baryon asymmetry and neutrino oscillation parameters. We find that for a fixed CP phase, the hierarchical case also succeeds in generating the observed baryon asymmetry in our universe, plus a non-vanishing U-e3 which is accessible in future baseline neutrino oscillation experiments. (c) 2008 Published by Elsevier B.V.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationBrachmachari, B., Okada, N. (2008): A 3×2 Texture for Neutrino Oscillations and Leptogenesis. Physics Letters B, 660(5). DOI: https://doi.org/10.1016/j.physletb.2008.01.043
dc.identifier.doi10.1016/j.physletb.2008.01.043
dc.identifier.issn0370-2693
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5675
dc.languageEnglish
dc.language.isoen_US
dc.publisherElsevier
dc.rights.holderElsevier B. V.
dc.rights.licenseAttribution 3.0 Unported (CC BY 3.0)
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectMATTER-ANTIMATTER ASYMMETRY
dc.subjectHEAVY MAJORANA NEUTRINOS
dc.subjectBARYON ASYMMETRY
dc.subjectCP VIOLATION
dc.subjectNON-CONSERVATION
dc.subjectMASS MATRICES
dc.subjectBARYOGENESIS
dc.subjectUNIVERSE
dc.subjectDECAYS
dc.subjectUNIFICATION
dc.subjectAstronomy & Astrophysics
dc.subjectPhysics, Nuclear
dc.subjectPhysics, Particles & Fields
dc.subjectPhysics
dc.titleA 3x2 texture for neutrino oscillations and leptogenesisen_US
dc.typetext
dc.typeArticle
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