About: Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data

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Description	Peculiarities of obtaining parameters for broad multichannel resonances from data are discussed analyzing the experimental data on processes ππ ππ, , in the scalar channel in a model-independent approach based on analyticity and unitarity and using an uniformization procedure. It is shown that one can obtain a good description of the ππ scattering data from the threshold up to 1.89 GeV with values of resonance parameters cited in the PDG tables as preferred. However, in this case the representation of the ππ background is not satisfactory and the data on the coupled process ππ are not well described, above 1.15 GeV even qualitatively. The combined analysis of the considered coupled processes is needed, which is also carried out satisfactorily. Then both above-indicated deficiencies related to the one-channel analysis are removed. The most important change concerns parameters of the f0(600) which are now in some accordance with the prediction by Weinberg on the basis of mended symmetry. The obtained ππ- scattering length agrees well with the values extracted from the data on Ke4 decay and DIRAC experiment and also with results from ChPT. Peculiarities of obtaining parameters for broad multichannel resonances from data are discussed analyzing the experimental data on processes ππ ππ, , in the scalar channel in a model-independent approach based on analyticity and unitarity and using an uniformization procedure. It is shown that one can obtain a good description of the ππ scattering data from the threshold up to 1.89 GeV with values of resonance parameters cited in the PDG tables as preferred. However, in this case the representation of the ππ background is not satisfactory and the data on the coupled process ππ are not well described, above 1.15 GeV even qualitatively. The combined analysis of the considered coupled processes is needed, which is also carried out satisfactorily. Then both above-indicated deficiencies related to the one-channel analysis are removed. The most important change concerns parameters of the f0(600) which are now in some accordance with the prediction by Weinberg on the basis of mended symmetry. The obtained ππ- scattering length agrees well with the values extracted from the data on Ke4 decay and DIRAC experiment and also with results from ChPT. (en)
Title	Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data (en)
skos:prefLabel	Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data (en)
skos:notation	RIV/61389005:_____/12:00388456!RIV13-AV0-61389005
http://linked.open...avai/predkladatel	Ústav jaderné fyziky AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP203/12/2126), P(LA08002)
http://linked.open...iv/cisloPeriodika	09036
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Bydžovský, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	157788
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/12:00388456
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	meson-meson scattering; scalar mesons; multichannel formalism (en)
http://linked.open.../riv/klicoveSlovo	meson-meson scattering scalar mesons multichannel formalism
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[79793573F661]
http://linked.open...i/riv/nazevZdroje	EPJ Web of Conferences
http://linked.open...in/vavai/riv/obor	BE
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Microscopic models for the description of hadronic systems Cooperatin of Czech Republic with JINR Dubna in the theoretical and nuclear physics and application of nuclear methods in other fields
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	37
http://linked.open...iv/tvurceVysledku	Bydžovský, Petr Gutsche, T. Lyubovitskij, V. E. Surovtsev, Yu. S. Kaminski, R. Nagy, M.
issn	2100-014X
number of pages	3 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/epjconf/20123709036
is http://linked.open...avai/riv/vysledek of	Parameters of scalar resonances from the combined analysis of ππ scattering and coupled-channel data

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