We propose a low scale renormalizable trinification theory that successfully explains the flavour... more We propose a low scale renormalizable trinification theory that successfully explains the flavour hierarchies, neutrino puzzle, dark matter and leptogenesis. The proposed theory is based on the $SU(3)_{C}\times SU\left(3\right)_{L}\times SU\left( 3\right)_{R}$ gauge symmetry, which is supplemented with an additional flavor symmetry $U\left( 1\right)_{X}\times \mathbb{Z}_{2}^{\left(1\right) }\times \mathbb{Z}_{2}^{\left( 2\right) }$. In the proposed model the top quark and the exotic fermions do acquire tree-level masses, whereas the SM charged fermions lighter than the top quark gain one-loop level masses. In addition, the light active neutrino masses arise from a combination of radiative and type I seesaw mechanisms, with the Dirac neutrino mass matrix generated at one loop level.
Abstract: We discuss some generic properties of lepton number violating (\ Lv) processes and thei... more Abstract: We discuss some generic properties of lepton number violating (\ Lv) processes and their relation to different entries of the Majorana neutrino mass matrix. Present and near future experiments searching for these processes, except the neutrinoless double beta ...
We present a general analysis of the spin transfer for Λ and production in deep-inelastic scatter... more We present a general analysis of the spin transfer for Λ and production in deep-inelastic scattering of polarized charged leptons on the nucleon, and find that the pattern of different behaviors of Λ and production observed by the E665 Collaboration suggests the possibility of quark– ...
Diffractive production of heavy flavors is calculated within the light-cone dipole approach. Nove... more Diffractive production of heavy flavors is calculated within the light-cone dipole approach. Novel leading twist mechanisms are proposed, which involve both short and long transverse distances inside the incoming hadron. Nevertheless, the diffractive cross section turns out to be sensitive to the primordial transverse momenta of projectile gluons, rather than to the hadronic size. Our calculations agree with the available data for diffractive production of charm and beauty, and with the observed weak variation of the diffraction-to-inclusive cross section ratios as function of the hard scale.
This lecture presents a short review of the main features of diffractive processes and QCD inspir... more This lecture presents a short review of the main features of diffractive processes and QCD inspired models. It includes the following topics: (1) Quantum mechanics of diffraction: general properties; (2) Color dipole description of diffraction; (3) Color transparency; (4) Soft diffraction in hard reactions: DIS, Drell-Yan, Higgs production; (5) Why Pomerons interact weakly; (6) Small gluonic spots in the proton; (7) Diffraction near the unitarity bound: the Goulianos-Schlein "puzzle"; (8) Diffraction on nuclei: diffractive Color Glass; (9) CGC and gluon shadowing.
The nucleon helicity-independent generalized parton distributions (GPDs) of quarks are calculated... more The nucleon helicity-independent generalized parton distributions (GPDs) of quarks are calculated in the zero skewness case, in the framework of the AdS/QCD model. The present approach is based on a matching procedure of sum rules relating the electromagnetic form factors to GPDs and AdS modes.
Journal of Physics G: Nuclear and Particle Physics, 1998
Two new sum rules for the quark tensor charges of the nucleon are proposed, based on a relation c... more Two new sum rules for the quark tensor charges of the nucleon are proposed, based on a relation connecting the quark transversity distributions to the quark helicity distributions and the quark model spin distributions, and on the sum rules for the quark helicity distributions. ...
We propose a low scale renormalizable trinification theory that successfully explains the flavour... more We propose a low scale renormalizable trinification theory that successfully explains the flavour hierarchies, neutrino puzzle, dark matter and leptogenesis. The proposed theory is based on the $SU(3)_{C}\times SU\left(3\right)_{L}\times SU\left( 3\right)_{R}$ gauge symmetry, which is supplemented with an additional flavor symmetry $U\left( 1\right)_{X}\times \mathbb{Z}_{2}^{\left(1\right) }\times \mathbb{Z}_{2}^{\left( 2\right) }$. In the proposed model the top quark and the exotic fermions do acquire tree-level masses, whereas the SM charged fermions lighter than the top quark gain one-loop level masses. In addition, the light active neutrino masses arise from a combination of radiative and type I seesaw mechanisms, with the Dirac neutrino mass matrix generated at one loop level.
Abstract: We discuss some generic properties of lepton number violating (\ Lv) processes and thei... more Abstract: We discuss some generic properties of lepton number violating (\ Lv) processes and their relation to different entries of the Majorana neutrino mass matrix. Present and near future experiments searching for these processes, except the neutrinoless double beta ...
We present a general analysis of the spin transfer for Λ and production in deep-inelastic scatter... more We present a general analysis of the spin transfer for Λ and production in deep-inelastic scattering of polarized charged leptons on the nucleon, and find that the pattern of different behaviors of Λ and production observed by the E665 Collaboration suggests the possibility of quark– ...
Diffractive production of heavy flavors is calculated within the light-cone dipole approach. Nove... more Diffractive production of heavy flavors is calculated within the light-cone dipole approach. Novel leading twist mechanisms are proposed, which involve both short and long transverse distances inside the incoming hadron. Nevertheless, the diffractive cross section turns out to be sensitive to the primordial transverse momenta of projectile gluons, rather than to the hadronic size. Our calculations agree with the available data for diffractive production of charm and beauty, and with the observed weak variation of the diffraction-to-inclusive cross section ratios as function of the hard scale.
This lecture presents a short review of the main features of diffractive processes and QCD inspir... more This lecture presents a short review of the main features of diffractive processes and QCD inspired models. It includes the following topics: (1) Quantum mechanics of diffraction: general properties; (2) Color dipole description of diffraction; (3) Color transparency; (4) Soft diffraction in hard reactions: DIS, Drell-Yan, Higgs production; (5) Why Pomerons interact weakly; (6) Small gluonic spots in the proton; (7) Diffraction near the unitarity bound: the Goulianos-Schlein "puzzle"; (8) Diffraction on nuclei: diffractive Color Glass; (9) CGC and gluon shadowing.
The nucleon helicity-independent generalized parton distributions (GPDs) of quarks are calculated... more The nucleon helicity-independent generalized parton distributions (GPDs) of quarks are calculated in the zero skewness case, in the framework of the AdS/QCD model. The present approach is based on a matching procedure of sum rules relating the electromagnetic form factors to GPDs and AdS modes.
Journal of Physics G: Nuclear and Particle Physics, 1998
Two new sum rules for the quark tensor charges of the nucleon are proposed, based on a relation c... more Two new sum rules for the quark tensor charges of the nucleon are proposed, based on a relation connecting the quark transversity distributions to the quark helicity distributions and the quark model spin distributions, and on the sum rules for the quark helicity distributions. ...
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