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Llanes Estrada, Felipe José ; Cotanch, Stephen R. ; Szczepaniak, Adam P. ; Swanson, Eric S. | Springer-Verlag | 2004-03We 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
Mikhasenko, M. ; Pilloni, A. ; Jackura, A. ; Albadalejo, M. ; Fernández Ramírez, César ; Mathieu, V. ; Nys, J. ; Rodas Bilbao, Arkaitz ; Ketzer, B. ; Szczepaniak, Adam P. | American Physical Society | 2018-11-28We perform an analysis of the three-pion system with quantum numbers J(PC) = 1(++) thornthorn produced in the weak decay of tau leptons. The interaction is known to be dominated by the axial meson alpha(1) (1260). We build a model based on appro[...]texto impreso
Llanes Estrada, Felipe José ; Szczepaniak, Adam P. ; Londergan, J. T. | Polish Acad Sciences Inst Physics | 2009-08Recently we have shown that exclusive QCD photon-induced reactions at low Mandelstam-t are best described by Regge exchanges in the entire scaling region, and not only for low values of Bjorken- x. In this paper we explore this crucial Regge beh[...]texto impreso
Nebreda Manjón, Jenifer ; Carrasco, J. A. ; Londergan, J. T. ; Peláez Sagredo, José Ramón ; Szczepaniak, Adam P. | American Institute of Physics AIP | 2016Our results on obtaining the Regge trajectory of a resonance from its pole in a scattering process and from analytic constraints in the complex angular momentum plane are presented. The method, suited for resonances that dominate an elastic scat[...]
