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Statements

Subject Item
n2:RIV%2F68407700%3A21670%2F08%3A15152522%21RIV09-MSM-21670___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
The e+e--->pi+pi-pi0pi0 reaction cross section as a function of the incident energy is calculated using a model that is an extension of our recently published model of the e+e- annihilation into four charged pions. The latter considered the intermediate states with the pi, rho, and a1 mesons and fixed the mixing angle of the a1rhopi Lagrangian and other parameters by fitting the cross section data. Here we supplement the original intermediate states with those containing omega(782) and h1(1170), but keep unchanged the values of those parameters that enter both charged and mixed channel calculations. The inclusion of omega is vital for obtaining a good fit to the cross section data, while the intermediate states with h1 further improve it. Finally, we merge our models of the e+e--->pi+pi-pi0pi0 and e+e--->pi+pi-pi+pi- reactions and obtain a simultaneous good fit. Účinný průřez reakce e+e--->pi+pi-pi0pi0 je počítán pomocí modelu, který je rozšířením našeho modelu uvažující e+e- anihilaci na čtyři nabité piony. Původní model uvažoval intermediální stavy s pi, rho a a1 mezony a jeho fitem na data účinného průřezu byly určeny parametry a1rhopi lagrangiánu. Nyní byly tyto intermediální stavy rozšířeny o stavy s mezony omega(782) a h1(1170). Parametry modelu, které jsou společné oběma kanálům, jsou zafixovány fitem na kanál e+e--->pi+pi-pi+pi-. Ukazuje se, že zahrnutí mezonu omega je pro získání dobrých fitů důležité. Zahrnutí mezonu a1 výsledky dále zlepší. Provedení simultánního fitu na oba kanály reakce, tj. e+e--->pi+pi-pi0pi0 a e+e--->pi+pi-pi+pi-, dává velmi uspokojivé výsledky. The e+e--->pi+pi-pi0pi0 reaction cross section as a function of the incident energy is calculated using a model that is an extension of our recently published model of the e+e- annihilation into four charged pions. The latter considered the intermediate states with the pi, rho, and a1 mesons and fixed the mixing angle of the a1rhopi Lagrangian and other parameters by fitting the cross section data. Here we supplement the original intermediate states with those containing omega(782) and h1(1170), but keep unchanged the values of those parameters that enter both charged and mixed channel calculations. The inclusion of omega is vital for obtaining a good fit to the cross section data, while the intermediate states with h1 further improve it. Finally, we merge our models of the e+e--->pi+pi-pi0pi0 and e+e--->pi+pi-pi+pi- reactions and obtain a simultaneous good fit.
dcterms:title
Jednotný popis e+e- anihilace na oba čtyřpionové kanály Joint description of the e+e- annihilation into both four-pion channels Joint description of the e+e- annihilation into both four-pion channels
skos:prefLabel
Jednotný popis e+e- anihilace na oba čtyřpionové kanály Joint description of the e+e- annihilation into both four-pion channels Joint description of the e+e- annihilation into both four-pion channels
skos:notation
RIV/68407700:21670/08:15152522!RIV09-MSM-21670___
n3:aktivita
n11:Z
n3:aktivity
Z(MSM6840770029)
n3:cisloPeriodika
1
n3:dodaniDat
n13:2009
n3:domaciTvurceVysledku
n12:6738923
n3:druhVysledku
n18:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
374011
n3:idVysledku
RIV/68407700:21670/08:15152522
n3:jazykVysledku
n17:eng
n3:klicovaSlova
pion; e+e- annihilation; a1rhopi Lagrangian
n3:klicoveSlovo
n5:a1rhopi%20Lagrangian n5:e%2Be-%20annihilation n5:pion
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[560C9C96D991]
n3:nazevZdroje
Physical Review D
n3:obor
n8:BF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
2
n3:rokUplatneniVysledku
n13:2008
n3:svazekPeriodika
78
n3:tvurceVysledku
Lichard, Peter Juráň, Josef
n3:wos
000258636400113
n3:zamer
n9:MSM6840770029
s:issn
1550-7998
s:numberOfPages
4
n6:organizacniJednotka
21670