We point out a Z2 × Z2 symmetry which characterizes uniquely the phenomenologically successful tripartite form leading to a tri-bimaximal mixing in the neutrino mass matrix. We impose this symmetry in a set up including the charged leptons and find that it can accommodate all the possible patterns of lepton masses in the framework of type-I and type-II seesaw mechanism. We also discuss the poss...

We study the possibility of generating the observed baryon asymmetry via leptogenesis in the decay of heavy Standard Model singlet fermions which carry lepton number, in a framework without Majorana masses above the electroweak scale. Such scenario does not contain any source of total lepton number violation besides the Standard Model sphalerons, and the baryon asymmetry is generated by the int...

Structure of leptons and hadrons within the framework of electrodynamics is considered. Muon and tau-lepton have the structure of 3 electrons. The mass of muon is defined by the section of two-photon annihilation. The mass of tau-lepton is defined by the section of three-photon annihilation. Hadrons are characterized by the structure of 5 electrons. The masses of hadrons are defined via the mas...

In the minimal standard model (SM) with mν = 0, the 3 lepton numbers Le, Lμ, and Lτ are separately conserved. However, given the present neutrino-oscillation data, which imply that neutrinos have mass and mix with one another, the only conserved lepton number is L = Le+Lμ+Lτ if mν is Dirac, and (−1)L if mν is Majorana. As a result, lepton flavor violation must occur in τ decays, which may be cl...

We show how the generation of a lepton number in the Early Universe induced by να ↔ νs, in presence of small baryon number inhomogeneities, gives rise to the formation of lepton domains. The structure of these domains reflects the spectral features of the baryon number inhomogeneities that generated it and interestingly the size of the lepton domains can be super-horizon. PACS numbers: 14.60.Pq...

We stress that specific texture zeros of lepton mass matrices, which might dynamically arise from a new kind of flavor symmetry, can help us to establish simple and testable relations between the lepton flavor mixing parameters and lepton mass ratios. We present a brief review of one-zero, two-zero and three-zero textures of the neutrino mass matrix. Their phenomenological consequences on neutr...

Double–lepton polarization asymmetries in Λb → Λl+l− decay are calculated using a general, model independent form of the effective Hamiltonian. The sensitivities of these asymmetries to the new Wilson coefficients are studied in detail. Furthermore, the correlations between averaged double–lepton polarization asymmetry and branching ratio are analyzed. It is shown that there exist certain regio...

Abstract $$SU(2)_L$$ S U ( 2 ) L -invariance links charged dilepton and dineutrino couplings. Phenomenological implications are worked out for flavor changing neutral currents inv...

A bstract Leptoquarks are ubiquitous in several extensions of the Standard Model and seem to be able accommodate universality-violation-driven B -meson-decay anomalies ( g ? 2) ? discrepancy interpreted as deviations from predictions. In addition, search for lepton-flavour violation charged sector is, at present, a major research program that could also facilitated by dynamics generated leptoqu...