In the large Nc approximation to QCD, the leading Ï€Ï€ scattering amplitude is expressed as the sum of an infinite number of tree diagrams. We investigate the possibility that an adequate approximationâ€¦ (More)

We further study the previously proposed Ansatz, Tr(MÎ½)=0, for a prediagonal light Majorana type neutrino mass matrix. If CP violation is neglected this enables one to use the existing data onâ€¦ (More)

The fine structure of the capillary bed of the anterior pituitary has been studied in 19 cases of pituitary tumor and 1 autopsy specimen. Tumor specimens were less well vascularized than the autopsyâ€¦ (More)

We study a vector-dominance model which predicts quite a large number of currently interesting decay amplitudes of the types S-->gammagamma, V-->Sgamma, and S-->Vgamma, where S and V denote scalarâ€¦ (More)

We review the Skyrme model approach which treats baryons as solitons of an effective meson theory. We start out with a historical introduction and a concise discussion of the original two flavorâ€¦ (More)

A brief introduction to the effective Lagrangian treatment of QCD (in the sense of using fields representing physical particles rather than quarks and gluons) will be given. The historical evolutionâ€¦ (More)

The radiative decays of the phi meson are known to be a good source of information about the a0(980) and f0(980) scalar mesons. We discuss these decays starting from a non-linear model Lagrangianâ€¦ (More)

Motivated by the 1/Nc expansion, we present a simple model of Ï€Ï€ scattering as a sum of a current-algebra contact term and resonant pole exchanges. The model preserves crossing symmetry as well asâ€¦ (More)

We propose a simple Ansatz for the three generation neutrino mass matrix MÎ½ which is motivated from an SO(10) grand unified theory. The Ansatz can be combined with information from neutrinoâ€¦ (More)