Polarisation in the reaction π+p → K+Σ+ at 1.11 GeV

Bellamy, E.H.; Anderson, J.; Crawford, J. F.; Osmon, P.E.; Strong, J. A.; Vickery, R.P.; Walker, Russell; Lipman, N.H.; Uto, H.; Walker, T.G.; Montgomery, T.A.; Solomonides, C.M.

doi:10.1016/0370-2693(72)90801-5

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…We employ the data by Candlin et al [104], supplemented by additional data at lower energies from Refs. [214][215][216][217][218]. The latter are compatible with the data from Ref.…”

Section: Reaction πN → ηNsupporting

confidence: 90%

Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ

Döring²,

et al. 2013

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Elastic πN scattering and the world data of the family of reactions π − p → ηn, K 0 Λ, K 0 Σ 0 , K + Σ − , and π + p → K + Σ + are described simultaneously in an analytic, unitary, coupled-channel approach. SU(3) flavor symmetry is used to relate both the t-and the u-channel exchanges that drive the meson-baryon interaction in the different channels. Angular distributions, polarizations, and spin-rotation parameters are compared with available experimental data. Partial-wave amplitudes are determined and the resonance content is extracted from the analytic continuation, including resonance positions and branching ratios, and possible sources of uncertainties are discussed. The results provide the final-state interactions for the ongoing analysis of photo-and electroproduction data.

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“…We employ the data by Candlin et al [104], supplemented by additional data at lower energies from Refs. [214][215][216][217][218]. The latter are compatible with the data from Ref.…”

Section: Reaction πN → ηNsupporting

confidence: 90%

Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ

Döring²,

et al. 2013

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“…A complete list of the reactions and references to the data is given in Tables 1-5 of reference [59]. The data sets we added here are differential cross section and recoil asymmetry on the π + p → K + Σ + reaction in the mass region below 1850 MeV [70,71,72,73,74], new CLAS data on γp− > K + Σ 0 [67], new MAMI data on γp → ηp [75] and for the reaction γp → K 0 Σ + the differential cross section [68]. We now excluded from the analysis the γp → ηp data on the target asymmetry: since there seems to be an inconsistency between these data and new preliminary CB-ELSA/TAPS data [76].…”

Section: Data Pwa Method and Fitsmentioning

confidence: 99%

Nucleon resonances in the fourth-resonance region

et al. 2011

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Abstract.Nucleon and ∆ resonances in the fourth resonance region are studied in a multichannel partial-wave analysis which includes nearly all available data on pion-and photo-induced reactions off protons. In the high-mass range, above 1850 MeV, several alternative solutions yield a good description of the data. For these solutions, masses, widths, pole residues and photo-couplings are given. In particular, we find evidence for nucleon resonances with spin-paritiesFor one set of solutions, there are four resonances forming naturally a spin-quartet of resonances with orbital angular momentum L = 2 and spin S = 3/2 coupling to J = 1/2, · · · , 7/2. Just below 1.9 GeV we find a spin doublet of resonances with J P = 1/2 − and 3/2 − . Since a spin partner with J P = 5/2 − is missing at this mass, the two resonances form a spin doublet which must have a symmetric orbital-angular-momentum wave function with L = 1. For another set of solutions, the four positive-parity resonances are accompanied by mass-degenerate negativeparity partners -as suggested by the conjecture of chiral symmetry restoration. The possibility of a J P = 1/2 + , 3/2 + spin doublet at 1900 MeV belonging to a 20-plet is discussed.

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“…Pion-induced reactions fitted in the coupled-channel analysis and χ 2 contributions for the solution BG2011-02a. [14] dσ/dΩ 70 20 1.47 [15] dσ/dΩ 84 30 2.98 [16] dσ/dΩ 300 30 0.90 [17,18] dσ [20][21][22][23][24] dσ/dΩ 728 35 1.46 [20][21][22][23][24][25] P 351 30 1.57 [26] β 7 600 2.04 resonances. Multibody final states are fitted in an eventbased likelihood fit.…”

Section: Introductionmentioning

confidence: 99%