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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F12%3A00388456%21RIV13-AV0-61389005
rdf:type
skos:Concept n5:Vysledek
dcterms: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.
dcterms: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
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
skos:notation
RIV/61389005:_____/12:00388456!RIV13-AV0-61389005
n5:predkladatel
n6:ico%3A61389005
n3:aktivita
n14:P n14:I
n3:aktivity
I, P(GAP203/12/2126), P(LA08002)
n3:cisloPeriodika
09036
n3:dodaniDat
n4:2013
n3:domaciTvurceVysledku
n19:2507455
n3:druhVysledku
n13:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
157788
n3:idVysledku
RIV/61389005:_____/12:00388456
n3:jazykVysledku
n18:eng
n3:klicovaSlova
meson-meson scattering; scalar mesons; multichannel formalism
n3:klicoveSlovo
n16:meson-meson%20scattering n16:scalar%20mesons n16:multichannel%20formalism
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[79793573F661]
n3:nazevZdroje
EPJ Web of Conferences
n3:obor
n17:BE
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
6
n3:projekt
n7:GAP203%2F12%2F2126 n7:LA08002
n3:rokUplatneniVysledku
n4:2012
n3:svazekPeriodika
37
n3:tvurceVysledku
Surovtsev, Yu. S. Kaminski, R. Bydžovský, Petr Lyubovitskij, V. E. Nagy, M. Gutsche, T.
s:issn
2100-014X
s:numberOfPages
3
n9:doi
10.1051/epjconf/20123709036