Production of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Σ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow

Carayannopoulos, N. L.; Tautfest, G.W.; Willmann, R.B.

doi:10.1103/physrev.138.b433

Cited by 37 publications

(11 citation statements)

References 12 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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“…Recoil asymmetry from π + p → K + Σ + . The data are from[44,45,46,47,48,60]. Full curves: the solution BnGa2013-02 and dashed curves: BnGa2011-02M.…”

mentioning

confidence: 99%

Sign ambiguity in the KΣ channel

Anisovich¹,

Klempt²,

Nikonov³

et al. 2013

Eur. Phys. J. A

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Ambiguities of the signs of N → ΣK coupling constants are studied in a multichannel partial wave analysis of a large body of pion and photo-induced reactions. It is shown that the signs are not free from some ambiguities, and further experimental data are needed. Data on the reactions π + p → Σ + K + and γp → K + Σ 0 define rather well the isospin 3/2 contributions to these channels. However the lack of information on polarization observables for the reactions π − p → Σ 0 K 0 , π − p → Σ − K + and γp → K 0 Σ + does not allow us to fix uniquely the signs of N → ΣK coupling constants. As a consequence, also the contributions of nucleon resonances to these channels remain uncertain.

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Production ofΣ+K+byπ+

Cited by 37 publications

References 12 publications

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

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

Nucleon resonances in the fourth-resonance region

Sign ambiguity in the KΣ channel

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