Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold

We improve, in the energy region between the K̅K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of π π scattering presented in a previous paper. For the S0 wave, we have included more data above the K̅K threshold and we have taken into account systematically the elasticity data o...

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Detalhes bibliográficos
Autores: Kamiński, R, Peláez Sagredo, José Ramón, Ynduráin, F. J.
Formato: artículo
Fecha de publicación:2006
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51727
Acesso em linha:https://hdl.handle.net/20.500.14352/51727
Access Level:acceso abierto
Palavra-chave:51-73
Phase-shift analysis
Gev-c
π-P->π π&N
Física-Modelos matemáticos
Física matemática
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oai_identifier_str oai:docta.ucm.es:20.500.14352/51727
network_acronym_str ES
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repository_id_str
spelling Pion-pion scattering amplitude. II. Improved analysis above K̅K thresholdKamiński, RPeláez Sagredo, José RamónYnduráin, F. J.51-73Phase-shift analysisGev-cπ-P->π π&NFísica-Modelos matemáticosFísica matemáticaWe improve, in the energy region between the K̅K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of π π scattering presented in a previous paper. For the S0 wave, we have included more data above the K̅K threshold and we have taken into account systematically the elasticity data on the reaction π π →K̅K. We here made a coupled channel fit. For the D0 wave, we have considered information on low energy parameters, and imposed a better fit to the f_2 resonance. For both waves the expressions we now find are substantially more precise than the previous ones. We also provide slightly improved D2 and P waves, including the estimated inelasticity for the first, and a more flexible parametrization between 1 and 1.42 GeV for the second. The accuracy of our amplitudes is now such that it requires a refinement of the Regge analysis, for^(1/2) ≥ 1.42 GeV, which we also carry out. We show that this more realistic input produces π π scattering amplitudes that satisfy better forward dispersion relations, particularly for π^0 π^0 scattering.Amer Physical SocUniversidad Complutense de Madrid20062006-07-0120062006-07-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/51727reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/517272026-06-02T12:44:21Z
dc.title.none.fl_str_mv Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
title Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
spellingShingle Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
Kamiński, R
51-73
Phase-shift analysis
Gev-c
π-P->π π&N
Física-Modelos matemáticos
Física matemática
title_short Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
title_full Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
title_fullStr Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
title_full_unstemmed Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
title_sort Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold
dc.creator.none.fl_str_mv Kamiński, R
Peláez Sagredo, José Ramón
Ynduráin, F. J.
author Kamiński, R
author_facet Kamiński, R
Peláez Sagredo, José Ramón
Ynduráin, F. J.
author_role author
author2 Peláez Sagredo, José Ramón
Ynduráin, F. J.
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 51-73
Phase-shift analysis
Gev-c
π-P->π π&N
Física-Modelos matemáticos
Física matemática
topic 51-73
Phase-shift analysis
Gev-c
π-P->π π&N
Física-Modelos matemáticos
Física matemática
description We improve, in the energy region between the K̅K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of π π scattering presented in a previous paper. For the S0 wave, we have included more data above the K̅K threshold and we have taken into account systematically the elasticity data on the reaction π π →K̅K. We here made a coupled channel fit. For the D0 wave, we have considered information on low energy parameters, and imposed a better fit to the f_2 resonance. For both waves the expressions we now find are substantially more precise than the previous ones. We also provide slightly improved D2 and P waves, including the estimated inelasticity for the first, and a more flexible parametrization between 1 and 1.42 GeV for the second. The accuracy of our amplitudes is now such that it requires a refinement of the Regge analysis, for^(1/2) ≥ 1.42 GeV, which we also carry out. We show that this more realistic input produces π π scattering amplitudes that satisfy better forward dispersion relations, particularly for π^0 π^0 scattering.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-07-01
2006
2006-07-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/51727
url https://hdl.handle.net/20.500.14352/51727
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Amer Physical Soc
publisher.none.fl_str_mv Amer Physical Soc
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425770309353472
score 15.300724

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