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Autor Szczepaniak, Adam P |
Documentos disponibles escritos por este autor (4)
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Llanes Estrada, Felipe José ; Cotanch, Stephen R ; Szczepaniak, Adam P ; Swanson, Eric S | Springer | 2004-07We review theoretical calculations for the pseudoscalar vector meson hyperfine splitting with no open flavor and also report a many body field theoretical effort to assess the impact of chiral symmetry in the choice of effective potentials for r[...]texto impreso
Llanes Estrada, Felipe José ; Cotanch, Stephen R ; Szczepaniak, Adam P ; Swanson, Eric S | American Physical Soc | 2004-09Meson spin splittings are examined within an effective Coulomb gauge QCD Hamiltonian incorporating chiral symmetry and a transverse hyperfine interaction necessary for heavy quarks. For light and heavy quarkonium systems the pseudoscalar-vector [...]texto impreso
Llanes Estrada, Felipe José ; Brodsky, Stanley J ; Szczepaniak, Adam P | Americal Physical Society | 2009-02The local coupling of two photons to the fundamental quark currents of a hadron gives an energy-independent contribution to the Compton amplitude proportional to the charge squared of the struck quark, a contribution which has no analog in hadro[...]texto impreso
Llanes Estrada, Felipe José ; Gorchtein, Mikhail ; Szczepaniak, Adam P | American Physical Society | 2013-05-03We assess the two-photon exchange contribution to the Lamb shift in muonic hydrogen with forward dispersion relations. The subtraction constant (T) over bar (0, Q(2)) that is necessary for a dispersive evaluation of the forward doubly virtual Co[...]