TY - JOUR
T1 - Softly broken μ τ symmetry in the minimal seesaw model
AU - Gómez-Izquierdo, Juan Carlos
AU - Pérez-Lorenzana, Abdel
PY - 2008/6/26
Y1 - 2008/6/26
N2 - Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent νμ-ντ exchange symmetry in neutrino mass matrix. We observe that in the minimally extended standard model with the seesaw mechanism, one can impose μ τ symmetry at the tree level on all Lagrangian terms, but for the mass difference among μ and τ leptons. In the absence of any new extra physics, this mass difference becomes the only source for the breaking of such a symmetry, which induces, via quantum corrections, small but predictable values for θ13, and for the deviation of θATM from maximality. In the CP conserving case, the predictions only depend on neutrino mass hierarchy and may provide a unique way to test for new physics with neutrino experiments.
AB - Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent νμ-ντ exchange symmetry in neutrino mass matrix. We observe that in the minimally extended standard model with the seesaw mechanism, one can impose μ τ symmetry at the tree level on all Lagrangian terms, but for the mass difference among μ and τ leptons. In the absence of any new extra physics, this mass difference becomes the only source for the breaking of such a symmetry, which induces, via quantum corrections, small but predictable values for θ13, and for the deviation of θATM from maximality. In the CP conserving case, the predictions only depend on neutrino mass hierarchy and may provide a unique way to test for new physics with neutrino experiments.
UR - http://www.scopus.com/inward/record.url?scp=46149127102&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.77.113015
DO - 10.1103/PhysRevD.77.113015
M3 - Artículo
AN - SCOPUS:46149127102
SN - 1550-7998
VL - 77
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 11
M1 - 113015
ER -