2 papers
hep-ph2005
Gluonic contribution to the nucleon self-energy in an effective theory
Alka Upadhyay, J. P. Singh
Gluonic contributions to the self-energy of a nucleon have been investigated in an effective theory. The couplings of the topological charge density to nucleons give rise to OZI vi…
hep-ph2004
Charge symmetry breaking in pion-nucleon coupling constant : QCD sum rule approach
J. P. Singh, Alka Upadhyay
Using the vacuum-to-pion matrix element of the correlation function of the interpolating fields of the two nucleons, the isospin splitting in the diagonal pion-nucleon coupling con…