Charge-exchange scattering in K^-p interactions below 300 MeV/c

Abstract

Cross sections for K-p charge exchange, based on new data equal in statistics to the sum of those of all previous determinations below 300 MeV/c, are presented. The results confirm an earlier observation by this collaboration that the previous measurements of these cross sections at low momentum were significantly underestimated. Evidence for the presence of P wave scattering is presented.

Exact calculations of a quasibound state in theK¯K¯Nsystem

“…scattering (the last reaction is described by the chirally motivated potential only) from different experiments [23][24][25][26][27].…”

Relativistic chiral SU(3) symmetry, large-Nc sum rules and meson–baryon scattering

“…6 we confront our result with a selection of differential cross sections from elastic K − -proton scattering [116]. The angular distribution patterns are [11,13,[114][115][116][117][118]. Further data points represented by open triangles [119] were not considered in the global fit.…”

“…The coefficient matrices C (I,c) [9] and C (I,c) [9] are constructed by analogy with those of the octet and decuplet contributions (see (109,114)). In particular one has C ΦB (F [9] , D [9] ) are given in terms of the F [9] and D [9] parameters introduced in (7) for all contributions except those for the Λ(1520) and Λ(1690) resonances…”

On the strangeness -1 S-wave meson-baryon scattering

“…[21] to obtain its fits A + 4 and B + 4 , since we are going to use these data also in our own fits. The latter include the σ(K − p → K − p) elastic cross section [52,53,54,55], the σ(K − p →K 0 n) charge exchange one [52,53,55,56,57], and several hyperon production reactions, σ( [53]. In our normalization the corresponding cross section, keeping only the S-wave, is given by…”

“…The data employed in the fit is that of section 3. The experimental references for the first six panels are: squares [52], diamonds [53], upwards triangles [54], circles [55], stars [56] and downwards triangles [57]. The data in the seventh panel, thick solid line, are from ref.…”