RT Journal Article
T1 Precise dispersive data analysis of the f_0(600) pole
A1 Garcia-Martin, R
A1 Kamiński, Robert
A1 Peláez Sagredo, José Ramón
AB We review how the use of recent precise data on kaon decays together with forward dispersion relations (FDR) and Roy’s equations allow us to determine the sigma resonance pole position very precisely, by using only experimental input. In addition, we present preliminary results for a modified set of Roy-like equations with only one subtraction, that show a remarkable improvement in the precision around the σ region. We also improve the matching between the parametrizations at low and intermediate energy of the S0 wave, and show that the effect of this on the sigma pole position is negligible.
PB World scientific publ co pte LTD
SN 0217-751X
YR 2009
FD 2009-01-03
LK https://hdl.handle.net/20.500.14352/44852
UL https://hdl.handle.net/20.500.14352/44852
LA eng
NO ©World scientific publ co pte LTD.Conference MESON 2008 (2008.Cracow, Polonia).This work is dedicated to the memory of Prof. F. J. Yndur ain. We thank H. Leutwyler for his comment about the matching condition, and the organizers for creating the nice scientific atmosphere of the event and the Spanish research contracts PR27/05-13955-BSCH, FPA2004-02602, UCM-CAM 910309 and BFM2003-00856 for partial
NO BSCH
NO UCM-CAM
DS Docta Complutense
RD 6 abr 2025