Radiative corrections to the leptonic Dirac CP-violating phase
2013 (English)In: Physical Review D, ISSN 1550-7998, Vol. 87, no 1, 013012- p.Article in journal (Refereed) Published
Since the smallest leptonic mixing angle theta(13) has been measured to be relatively large, it is quite promising to constrain or determine the leptonic Dirac CP-violating phase delta in future neutrino oscillation experiments. Given some typical values of delta = pi/2, pi, and 3 pi/2 at the low energy scale, as well as current experimental results of the other neutrino parameters, we perform a systematic study of radiative corrections to delta by using the one-loop renormalization group equations in the minimal supersymmetric standard model and the universal extra-dimensional model. It turns out that delta is rather stable against radiative corrections in both models, except for the minimal supersymmetric standard model with a very large value of tan beta. Both cases of Majorana and Dirac neutrinos are discussed. In addition, we use the preliminary indication of delta = (1.08(-0.31)(+0.28))pi or delta = (1.67(-0.77)(+0.37))pi from the latest global-fit analyses of data from neutrino oscillation experiments to illustrate how it will be modified by radiative corrections.
Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 87, no 1, 013012- p.
Neutrino Mass Operator, Renormalization-Group Equations, Prediction, Parameters, Model
IdentifiersURN: urn:nbn:se:kth:diva-119048DOI: 10.1103/PhysRevD.87.013012ISI: 000314229300003OAI: oai:DiVA.org:kth-119048DiVA: diva2:609400
FunderSwedish Research Council, 621-2011-3985
QC 201303052013-03-052013-03-052013-12-16Bibliographically approved