An improved study of the kappa resonance and the non-exotic $s$ wave $πK$ scatterings up to $\sqrt{s}=2.1$GeV of LASS data

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dc.creatorZhou, Z. Y.
dc.creatorZheng, H. Q.
dc.date2006-03-08
dc.date2006-06-20
dc.date.accessioned2026-07-07T10:29:52Z
dc.date.available2026-07-07T10:29:52Z
dc.descriptionWe point out that the dispersion relation for the left hand cut integral presented in one of our previous paper (Nucl. Phys. {\bf A}733(2004)235) is actually free of subtraction constant, even for unequal mass elastic scatterings. A new fit to the LASS data~\cite{Aston} is performed and firm evidence for the existence of $κ$ pole is found. The correct use of analyticity also put strong constraints on threshold parameters -- which are found to be in good agreement with those obtained from chiral theories. We also determined the pole parameters of $K_0^*(1430)$ on the second sheet, and reconfirm the existence of $K_0^*(1950)$ on the third sheet. We stress that the LASS data do not require them to have the twin pole structure of a typical Breit--Wigner resonance.
dc.description14 pages + 4 postscript figures; discussions largely expanded; references added; version to appear in NPA; title changed in the journal
dc.identifierhttps://arxiv.org/abs/hep-ph/0603062
dc.identifierhttp://arxiv.org/abs/hep-ph/0603062
dc.identifierNucl.Phys.A775:212-223,2006
dc.identifierdoi:10.1016/j.nuclphysa.2006.06.170
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177960
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAn improved study of the kappa resonance and the non-exotic $s$ wave $πK$ scatterings up to $\sqrt{s}=2.1$GeV of LASS data
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