About: Modification of pi pi Amplitudes and Position of the sigma Pole

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Meson-meson interaction amplitudes especially pi pi scattering amplitudes are often used incorrectly. It also applies to parameters of the sigma meson. This causes two significant problems: threshold behavior and position of the sigma pole which is suspicious. We modified multichannel S- and P-wave amplitudes for the pi pi scattering, using dispersion relations with imposed crossing symmetry condition. The amplitudes are modified in the low-energy region to improve their consistency with experimental data and the dispersion relations. Agreement with data is achieved for the both amplitudes from the threshold up to 1.8 GeV and with dispersion relations up to 1.1 GeV. Consequences of the applied modifications, e.g. changes of the S-wave lowest-pole positions, are presented. Meson-meson interaction amplitudes especially pi pi scattering amplitudes are often used incorrectly. It also applies to parameters of the sigma meson. This causes two significant problems: threshold behavior and position of the sigma pole which is suspicious. We modified multichannel S- and P-wave amplitudes for the pi pi scattering, using dispersion relations with imposed crossing symmetry condition. The amplitudes are modified in the low-energy region to improve their consistency with experimental data and the dispersion relations. Agreement with data is achieved for the both amplitudes from the threshold up to 1.8 GeV and with dispersion relations up to 1.1 GeV. Consequences of the applied modifications, e.g. changes of the S-wave lowest-pole positions, are presented. (en)
Title	Modification of pi pi Amplitudes and Position of the sigma Pole Modification of pi pi Amplitudes and Position of the sigma Pole (en)
skos:prefLabel	Modification of pi pi Amplitudes and Position of the sigma Pole Modification of pi pi Amplitudes and Position of the sigma Pole (en)
skos:notation	RIV/61389005:_____/14:00433599!RIV15-GA0-61389005
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP203/12/2126)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2015
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	30115
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/14:00433599
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	pion-pion scattering; coupled channels; dispersion relations (en)
http://linked.open.../riv/klicoveSlovo	pion-pion scattering dispersion relations coupled channels
http://linked.open...odStatuVydavatele	PL - Polská republika
http://linked.open...ontrolniKodProRIV	[8E330B68A26E]
http://linked.open...i/riv/nazevZdroje	Acta physica Polonica. B
http://linked.open...in/vavai/riv/obor	BE
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Microscopic models for the description of hadronic systems
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	45
http://linked.open...iv/tvurceVysledku	Bydžovský, Petr Kaminski, R. Nazari, V.
http://linked.open...ain/vavai/riv/wos	000341123100020
issn	0587-4254
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.5506/APhysPolB.45.1549

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