Partial-wave analysis ofK¯Nscattering reactions

Abstract

We investigate the two-body reactions KN → KN , KN → πΛ, and KN → πΣ via single-energy partial-wave analyses in the center-of-mass (c.m.) energy range 1480 to 2100 MeV. The partialwave amplitudes for these reactions thus extracted were constrained by a multichannel energydependent model satisfying unitarity of the partial-wave S-matrix. We obtain excellent predictions of differential cross sections, polarizations, polarized cross sections, and cross sections for these reactions from a global energy-dependent solution.

Light-Quark Baryon Spectroscopy from ANL-Osaka Dynamical Coupled-Channels Analysis

“…9, we compare the mass spectra of Λ * resonances extracted from our analysis [13,14] and the analysis by the Kent State University (KSU) group [37]. In our analysis, we found two distinct solutions that have quite different values for our model parameters, yet both give similar quality of the fits to the K − p reaction data included in our analysis.…”

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

“…Comparing Eqs. (19) and (21), we see that in Eq. (21) the summation of total spin (S) and angular momentum (L) is taken independently for the initialKN and final πΣ * channels.…”

“…The partial-wave amplitudes are also essential in theoretical calculations of the production of hypernuclei from kaon-induced nuclear reactions within the well-studied multiple scattering theory. It is therefore interesting to compare our resulting partial-wave amplitudes with those determined in the recent single-energy partialwave analysis performed by the KSU group [19]. There exist several previous partial-wave analyses [2][3][4][5][6][7][8] ofKN reactions.…”

“…29-31. Here we only compare the results from Models A and B because KSU [19] did not provide them (in particular, they did not include the KΞ channel in their analysis). Overall, the amplitudes from Models A and B do not converge, and this can be understood given the tiny amount of the data forKN → KΞ, ηΛ as shown in Table II.…”

“…The partial-wave amplitudes of theKN reactions obtained from the constructed models are then compared with the results from the recent single-energy partial-wave analysis [19] of the KSU group. These two results will be presented in this paper.…”