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7 papers · 2 filters
Renormalization of the weak hadronic current in the nuclear medium
T. Siiskonen, M. Hjorth-Jensen, J. Suhonen
The renormalization of the weak charge-changing hadronic current as a function of the reaction energy release is studied at the nucleonic level. We have calculated the average quen…
Low lying states in the baryon spectrum
C. Helminen, D. O. Riska
The coupling to light mesons leads to large widths and shifts of the energy of the excited states in the baryon spectrum from the predictions of the constituent quark model with th…
Pion loop fluctuations of constituent quarks and baryons
L. Ya. Glozman, D. O. Riska
The implications of the pion (meson) degrees of freedom for baryon properties, taken at the constituent quark and baryon levels are compared. It is shown that there is a dramatic q…
Nucleon form factors in the canonically quantized Skyrme model
A. Acus, E. Norvaišas, D. O. Riska
The explicit expressions for the electric, magnetic, axial and induced pseudoscalar form factors of the nucleons are derived in the {\it ab initio} quantized Skyrme model. The cano…
Charge Symmetry Violation in as a Test of Chiral Effective Field Theory
U. van Kolck, J. A. Niskanen, G. A. Miller
Chiral effective field theory predicts a specific charge symmetry violating amplitude for pion production. This term is shown to provide the dominant contribution to the forward-ba…
The Reaction and the eta-Nucleon and Nucleon-Nucleon Interactions
M. T. Peña, H. Garcilazo, D. O. Riska
The , and exchange contributions to the cross-section for the reaction near threshold are calculated with a phenomenological description of the intermediate…