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Title:  Nonzero U_e3 from charged lepton corrections and the atmospheric neutrino mixing angle 
Authors:  Marzocca, David; Petcov, Serguey T.; Romanino, Andrea; Cerdá Sevilla, María 
Keywords:  Neutrino Physics CP violation 
Issue Date:  1May2013 
Publisher:  Springer 
Citation:  Journal of High Energy Physics 05 (5): 073  27 (2013) 
Abstract:  After the successful determination of the reactor neutrino mixing angle theta(13) not equal 0.16 not equal 0, a new feature suggested by the current neutrino oscillation data is a sizeable deviation of the atmospheric neutrino mixing angle theta(23) from pi/4. Using the fact that the neutrino mixing matrix U = (UeU nu)Udagger, where Ue and Unu result from the diagonalisation of the charged lepton and neutrino mass matrices, and assuming that Unu has a i) bimaximal (BM), H) tribimaximal (TBM) form, or else Hi) corresponds to the conservation of the lepton charge L' = Le  L mu  Ltau (LC), we investigate quantitatively what are the minimal forms of Ue, in terms of angles and phases it contains, that can provide the requisite corrections to Unu so that theta(13), theta(23) and the solar neutrino mixing angle theta(12) have values compatible with the current data. Two possible orderings of the 12 and the 23 rotations in Ue, "standard" and "inverse", are considered. The results we obtain depend strongly on the type of ordering. In the case of "standard" ordering, in particular, the Dirac CP violation phase delta, present in U, is predicted to have a value in a narrow interval around i) delta similar or equal to pi in the BM (or LC) case, H) delta congruent to 3 pi/2 or pi/2 in the TBM case, the CP conserving values delta = 0, pi, 2 pi being excluded in the TBM case at more than 4 sigma. 
Publisher version (URL):  http://dx.doi.org/10.1007/JHEP05(2013)073 
URI:  http://hdl.handle.net/10261/124916 
DOI:  10.1007/JHEP05(2013)073 
ISSN:  10298479 
EISSN:  10298479 
Appears in Collections:  (IFIC) Artículos 
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