RT Journal Article
T1 Sigma pole position and errors of a once and twice subtracted dispersive analysis of π and π scattering data
A1 Kamiński, Robert
A1 Garcia-Martin, R.
A1 Grynkiewicz, P.
A1 Peláez Sagredo, José Ramón
AB We show how the new precise data on kaon decays together with forward dispersion relations, sum rules and once- and twice-subtracted Roy’s equations allow for a precise determination of the sigma meson pole position. We present a comparison and a study of the different sources of  uncertainties when using either once- or twicesubtracted Roy’s equations to analyze the data. Finally we present a preliminary determination of the σ pole from the constrained dispersive data analysis.
PB Elsevier Science Bv
SN 0920-5632
YR 2009
FD 2009-01
LK https://hdl.handle.net/20.500.14352/44857
UL https://hdl.handle.net/20.500.14352/44857
LA eng
NO ©Elsevier Science Bv.This talk is dedicated to the memory of F.J. Yndurain. Partial financial support from Spanish contracts PR27/05-13955-BSCH, FPA2004- 02602, UCM-CAM 910309 and BFM2003-00856.
NO UCM-CAM
DS Docta Complutense
RD 18 abr 2025