Correlations of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>π</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math>partial waves for multireaction analyses

Döring, Michael; Revier, J.; Rönchen, D.; Workman, R. L.

doi:10.1103/physrevc.93.065205

Cited by 17 publications

(8 citation statements)

References 68 publications

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“…In Ref. [110] the covariance matrices and other fit properties of the SAID single-energy solution are provided. This allows to perform correlated χ 2 fits of the SAID partial-wave amplitudes in a statistically meaningful way such that the contribution to the χ 2 from πN scattering is very close to the true one that one would obtain from fitting to the data.…”

Section: B Numerical Detailsmentioning

confidence: 99%

The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum

Rönchen¹,

Döring

Meißner

2018

Eur. Phys. J. A

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The Jülich-Bonn coupled-channel framework is extended to K + Λ photoproduction. The spectrum of nucleon and ∆ resonances is extracted from simultaneous fits to several pion-induced reactions in addition to pion, eta and K + Λ photoproduction off the proton. More than 40,000 data points up to a center-of-mass energy of E ∼ 2.3 GeV including recently measured double-polarization observables are analyzed. The influence of the γp → K + Λ channel on the extracted resonance parameters and the appearance of states not seen in other channels is investigated. The Jülich-Bonn model includes effective three-body channels and guarantees unitarity and analyticity, which is a prerequisite for a reliable determination of the resonance spectrum in terms of poles and residues.

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Section: B Numerical Detailsmentioning

confidence: 99%

The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum

Rönchen¹,

Döring

Meißner

2018

Eur. Phys. J. A

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“…However, a proper unitary multichannel analysis, as done in Ref. [43][44][45], should show the relevance of this channel. One similar case where this has been done is in the N * (1700)(3/2 − ) resonance, which in Ref.…”

Section: Resultsmentioning

confidence: 99%

Triangle mechanisms in the build up and decay of the N*(1875)

Samart

Oset

2017

Phys. Rev. C

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We have studied the N * (1875)(3/2 − ) resonance with a multichannel unitary scheme, considering the ∆π and Σ * K, with their interaction extracted from chiral Lagrangians, and then have added two more channels, the N * (1535)π and N σ, which proceed via triangle diagrams involving the Σ * K and ∆π respectively in the intermediate states. The triangle diagram in the N * (1535)π case develops a singularity at the same energy as the resonance mass. We determine the couplings of the resonance to the different channels and the partial decay widths. We find a very large decay width to Σ * K, and also see that, due to interference with other terms, the N σ channel has an important role in the ππ mass distributions at low invariant masses, leading to an apparently large N σ decay width. A discussion is done, justifying the convenience of an experimental reanalysis of this resonance to the light of the findings of the paper, using multichannel unitary schemes.

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“…Indeed, other analysis would need to fit the full correlations instead. These quantities, together with other relevant information, have been recently published [14].…”

Section: Statistical Aspectsmentioning

confidence: 99%

Developments of the Jülich–Bonn Dynamical Coupled-Channel Analysis

Döring

2018

Few-Body Syst

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A new analysis of KΛ photoproduction is presented, including the latest data measured at Jefferson Lab and other facilities. Evidence for two states has been found, the N (1900)3/2 + and N (2060)5/2 − resonances that have been seen in other analysis. Future extensions are discussed like the use of model selection techniques to achieve a minimal resonance content of the amplitude. Also, conceptual aspects like three-body unitarity are highlighted that can help to provide a connection between phenomenology and ab-initio lattice QCD calculations.

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Correlations ofπNpartial waves for multireaction analyses

Cited by 17 publications

References 68 publications

The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum

The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum

Triangle mechanisms in the build up and decay of the N*(1875)

Developments of the Jülich–Bonn Dynamical Coupled-Channel Analysis

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