458 citations
- William & MaryUS66 papers
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7 papers · 1 filter
Is there an Ay problem in low-energy neutron-proton scattering?
Franz Gross, Alfred Stadler
We calculate Ay in neutron-proton scattering for the interactions models WJC-1 and WJC-2 in the Covariant Spectator Theory. We find that the recent 12 MeV measurements performed at…
Hyperons in Two Flavor Chiral Perturbation Theory
Brian C. Tiburzi, Andre Walker-Loud
We use two-flavor chiral perturbation theory to describe hyperons. We focus on the strangeness conserving sector, and, as an example, calculate hyperon masses. Convergence of this…
Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
Franz Gross, Alfred Stadler
Using the covariant spectator theory (CST), we present two one boson exchange kernels that have been successfully adjusted to fit the 2007 world np data (containing 3788 data) belo…
Overview of nucleon structure studies
Marc Vanderhaeghen
A brief overview of the recent activity in the measurement of the elastic electromagnetic proton and neutron form factors is presented. It is discussed how the quality of the data…
Consequences Of Fully Dressing Quark-Gluon Vertex Function With Two-Point Gluon Lines
Hrayr H. Matevosyan, Anthony W. Thomas, Peter C. Tandy
We extend recent studies of the effects of quark-gluon vertex dressing upon the solutions of the Dyson-Schwinger equation for the quark propagator. A momentum delta function is use…
Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
A. Sibirtsev, J. Haidenbauer, S. Krewald +3
A Regge model with absorptive corrections is employed in a global analysis of the world data on positive and negative pion photoproduction for photon energies from 3 to 8 GeV. In t…