Pion- and photo-induced transition amplitudes to ΛK, ΣK and Nη

Anisovich, A. V.; Beck, R.; Klempt, E.; Nikonov, V. A.; Sarantsev, A.; Thoma, U.

doi:10.1140/epja/i2012-12088-3

Cited by 183 publications

(411 citation statements)

References 117 publications

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“…The quality of our fits is measured by the discrepancy parameter Ddp defined in Eqs. (6) and is given in the tables as well.…”

Section: -7mentioning

confidence: 99%

“…In principle, there are two ways to extract pole parameters from experimental data: (i) construct theoretical single or multichannel models, solve them, fit the obtained analytic solutions to the data, and extract the pole parameters of obtained solutions through an analytic continuation of the model functions into the complex energy plane; or (ii) make a local expansion of the partial-wave T matrix in the vicinity of a pole. At present, poles are usually extracted using the first method [2][3][4][5][6], but considerable effort has been put into the development of alternate approaches, such as the speed plot [7], time delay [8], N/D method [9], regularization procedure [10], or Pade approximation [11],…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

et al. 2015

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The pole structure of the current George Washington University (GWU-SAID) partial-wave analysis of elastic n N scattering and i]N production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using two different methods. For the energy-dependent fits, both contour integration and a Laurent + Pietarinen approach are used. In the case of single-energy fits, the Laurent+Pietarinen approach is used. Errors are estimated and the two sets of results are compared to other fits to data.

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“…The quality of our fits is measured by the discrepancy parameter Ddp defined in Eqs. (6) and is given in the tables as well.…”

Section: -7mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

et al. 2015

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“…Masses and widths are given in MeV, A 1/2 and A 3/2 in GeV −1/2 . The values given in [12,23,32,33] conclude that N(1900)3/2 + formation and decay leads to the observed pattern. These observations made directly from the data are confirmed by the Bonn-Gatchina (BnGa) multi-channel partial wave analysis which includes a large number of pion and photo-induced reactions in addition to the data presented here.…”

Section: Tablementioning

confidence: 91%

“…Compared to [23], further data were included in the BnGa-PWA [24]; including [21,[25][26][27] as well as our recently published double polarization data [28][29][30][31]. The new analysis returns N(1900)3/2 + properties which are well consistent with the values reported in [12,23] but inconsistent with the high precision mass and width claimed in [32,33]. The results are summarized in Table 1.…”

Section: Tablementioning

confidence: 99%

Data onIsandIcin
Sokhoyan¹,
Gutz²,
Pee³
et al. 2015
Physics Letters B
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Data on I s and I c in γ p → pπ 0 π 0 reveal cascade decays of N(1900) via N(1520)π CBELSA/TAPS Collaboration Photoproduction of two neutral pions off the proton is studied using linearly polarized photons, and the polarization observables I s and I c are measured for the first time. These two observables are unique to multi-meson final states; they characterize correlations between the linear photon polarization and the direction of outgoing single particles in photoproduction of three-body final states. The I s and I c distributions suggest that, in the 1.8 to 2.0 GeV mass region, the N(1520)3/2 − π intermediate state is reached with reaction dynamics consistent with a dominant J P = 3/2 + wave. These data are included in the Bonn-Gatchina (BnGa) partial wave analysis which is based on a large variety of data; the analysis confirms a significant contribution from the reaction chain γ p → N(1900)3/2 + → N(1520)3/2 − π 0 → pπ 0 π 0 . . of QCD. The majority of nucleon and excitations listed in the Review of Particle Physics (RPP) [1] were discovered in partial wave analyses of π N elastic scattering experiments. However, a large fraction of the resonances reported by Höhler and by Cutkosky and their collaborators [2,3] were not confirmed in a later analysis based on a much larger data sample [4]. Quark models [5,6] and lattice QCD [7] predict even more resonances than have been observed in [2,3]. Obviously, there is a large number of resonances with weak coupling to π N which cannot be extracted http://dx.

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“…In [160] we have reported transition amplitudes to ΛK, ΣK, and Nη for pion and photo-produced reactions. Fig.…”

Section: Photoproduction Multipoles From Different Pwa Groupsmentioning

confidence: 99%

Partial wave analysis

2017

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Abstract. The project A.2 of the SFB/TR16 "Subnuclear Structure of Matter" aimed at a combined multichannel partial wave analysis of all or of most data on pion and photo-induced reactions for invariant masses from the Δ(1232) region to 2300 MeV. In this review the most important results are presented. It is shown that the data and their partial wave analysis have improved our understanding of the dynamics of excited light-quark baryons significantly.

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Pion- and photo-induced transition amplitudes to ΛK, ΣK and Nη

Abstract: Pion and photo-induced inelastic reactions off protons are studied in a multichannel partial-wave analysis. Properties of nucleon and ∆ resonances are derived and compared to previous analyses. Amplitudes are shown for transitions to N η, ΛK, and ΣK final states.

Cited by 183 publications

References 117 publications

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

Data onIsandIcin
Sokhoyan¹,
Gutz²,
Pee³
et al. 2015
Physics Letters B
Self Cite
15
0
8
0
View full text Add to dashboard Cite

Partial wave analysis

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Pion- and photo-induced transition amplitudes to ΛK, ΣK and Nη

Abstract: Pion and photo-induced inelastic reactions off protons are studied in a multichannel partial-wave analysis. Properties of nucleon and ∆ resonances are derived and compared to previous analyses. Amplitudes are shown for transitions to N η, ΛK, and ΣK final states.

Cited by 183 publications

References 117 publications

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

Pole structure from energy-dependent and single-energy fits to GWU-SAIDπNelastic scattering data

Data onIsandIcinSokhoyan1, Gutz2, Pee3 et al. 2015Physics Letters BSelf Cite15080View full textAdd to dashboardCite

Partial wave analysis

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About

Data onIsandIcin
Sokhoyan¹,
Gutz²,
Pee³
et al. 2015
Physics Letters B
Self Cite
15
0
8
0
View full text Add to dashboard Cite