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Sigma pole position and errors of a once and twice subtracted dispersive analysis of π and π scattering data

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Kamiński, Robert and Garcia-Martin, R. and Grynkiewicz, P. and Peláez Sagredo, José Ramón (2009) Sigma pole position and errors of a once and twice subtracted dispersive analysis of π and π scattering data. Nuclear Physics B, 10 (15). pp. 318-321. ISSN 0920-5632

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Official URL: http://dx.doi.org/10.1016/j.nuclphysbps.2008.12.071




Abstract

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.


Item Type:Article
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©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.

Uncontrolled Keywords:Equation
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Atmospheric physics
ID Code:35190
Deposited On:26 Jan 2016 15:39
Last Modified:10 Dec 2018 15:09

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