The pole structure of the unitary, crossing symmetric low energy $ππ$ scattering amplitudes

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dc.creatorZhou, Z. Y.
dc.creatorQin, G. Y.
dc.creatorZhang, P.
dc.creatorXiao, Z. G.
dc.creatorZheng, H. Q.
dc.creatorWu, N.
dc.date2004-06-24
dc.date2005-02-20
dc.date.accessioned2026-07-07T10:49:08Z
dc.date.available2026-07-07T10:49:08Z
dc.descriptionThe pole structure of the low energy $ππ$ scattering amplitudes is studied using a proper chiral unitarization method combined with crossing symmetry and the low energy phase shift data. It is found that the $σ$ pole position is at $M_σ=470\pm 50MeV$, $Γ_σ=570\pm 50MeV$. The existence of the virtual state pole in the IJ=20 channel is reconfirmed. Various threshold parameters are estimated and are found in general in good agreement with the results obtained from the Roy equation analyses.
dc.descriptionMinor corrections made and references added. Final version accepted for publication as JHEP02(2005)043
dc.identifierhttps://arxiv.org/abs/hep-ph/0406271
dc.identifierhttp://arxiv.org/abs/hep-ph/0406271
dc.identifierJHEP0502:043,2005
dc.identifierdoi:10.1088/1126-6708/2005/02/043
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184118
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe pole structure of the unitary, crossing symmetric low energy $ππ$ scattering amplitudes
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