2026-08-20T06:03:45Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/448522023-08-28T07:52:55Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Garcia-Martin, R
author
Kamiński, Robert
author
Peláez Sagredo, José Ramón
2023-06-20T04:03:08Z
2023-06-20T04:03:08Z
2009-01-03
0217-751X
10.1142/S0217751X09044140
https://hdl.handle.net/20.500.14352/44852
http://dx.doi.org/10.1142/S0217751X09044140
http://www.worldscientific.com
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.
eng
Precise dispersive data analysis of the f_0(600) pole
journal article
URL
https://docta.ucm.es/bitstreams/06a0ff6f-9360-48d4-b61d-c9c3729a098b/download
File
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application/pdf
pelaezsagredo34preprint.pdf
URL
https://docta.ucm.es/bitstreams/df8fd9e2-2962-40ef-8b69-faa2dfce40a7/download
File
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da370e60769376b78fcfbb3fe9e997f8
10056
text/plain
pelaezsagredo34preprint.pdf.txt