84 citations · 261 across the 8 of their papers we have counts for
8 papers
Perturbative results for the matrix elements of the vector current and the role of different infrared regulators
Alessio Carmelo Alvaro, Ignacio Castelli, Cédric Lorcé +3
We investigate the twist-2 unpolarized generalized parton distributions (GPDs) of quarks for an on-shell gluon target in quantum chromodynamics. These GPDs parametrize the leading-…
Perturbative results of matrix elements of the axial current and their relation with the axial anomaly
Ignacio Castelli, Adam Freese, Cédric Lorcé +3
In the Standard Model of particle physics, the axial current is not conserved, due both to fermion masses and to the axial anomaly. Using perturbative quantum chromodynamics, we ca…
Dispersion relation formalism for virtual Compton scattering off the proton
B. Pasquini, M. Gorchtein, D. Drechsel +2
We present in detail a dispersion relation formalism for virtual Compton scattering (VCS) off the proton from threshold into the -resonance region. Such a formalism can be…
Dispersion analysis for generalized spin polarizabilities
M. Vanderhaeghen, D. Drechsel, M. Gorchtein +2
We report on a dispersion relation formalism for the virtual Compton scattering (VCS) reaction on the proton, which for the first time allows a dispersive evaluation of 4 generaliz…
Dispersion relation formalism for virtual Compton scattering and the generalized polarizabilities of the nucleon
B. Pasquini, D. Drechsel, M. Gorchtein +2
A dispersion relation formalism for the virtual Compton scattering (VCS) reaction on the proton is presented, which for the first time allows a dispersive evaluation of 4 generaliz…
Generalized polarizabilities of the nucleon studied in the linear sigma model (II)
A. Metz, D. Drechsel
In a previous paper virtual Compton scattering off the nucleon has been investigated in the one-loop approximation of the linear sigma model in order to determine the 3 scalar gene…
Structure analysis of the virtual Compton scattering amplitude at low energies
D. Drechsel, G. Knoechlein, A. Yu. Korchin +2
We analyze virtual Compton scattering off the nucleon at low energies in a covariant, model-independent formalism. We define a set of invariant functions which, once the irregular…
Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon
D. Drechsel, G. Knoechlein, A. Metz +1
We discuss the low-energy behavior of the spin-averaged amplitude of virtual Compton scattering (VCS) off a nucleon. Based on gauge invariance, Lorentz invariance and the discrete…