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Pospischil, Th.; Bartsch, P.; Baumann, D.; Bermuth, J.; Böhm, R.; Bohinc, Klemen; Derber, S.; Ding, M.; Distler, M. O.; Drechsel, D.; Elsner, D.; Ewald, I.; Jm, Friedrich; Geiges, R.; Hedicke, S.; Jennewein, P.; Kahrau, M.; Kamalov, S.S.; Klein, F.; Krygier, K. W.; Lac, J.; Liesenfeld, A.; McIntyre, Justin I.; Merkel, H.; Merle, P.; Müller, U.; Neuhausen, R.; Potokar, M.; Ransome, R. D.; Rohe, D.; Rosner, G.; Schmieden, H.; Seimetz, M.; Širca, S.; Sick, I.; Süle, A.; Tiator, L.; Wagner, Andreas; Walcher, Th.; Warren, G.; Weis, M.

doi:10.1103/physrevlett.86.2959

Cited by 89 publications

(14 citation statements)

References 25 publications

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“…Since the magnetic dipole transitions (M 1) are experimentally dominant over the electric quadrupole transitions (E2) in hyperon radiative decays, one can neglect the contribution from the E2 transitions to the radiative decays of heavy baryons. This is a plausible approximation, since the the size of the E2/M 1 ratio for the ∆ isobar is yielded in the range of (1 − 3) % experimentally [49][50][51][52][53][54]. Though there is no experimental data on the E2/M 1 ratio for the singly heavy baryons, we can safely assume that the size of the E2/M 1 ratio is very small.…”

Section: Transition Magnetic Moments and Partial Decay Widths Ofmentioning

confidence: 93%

Magnetic transitions and radiative decays of singly heavy baryons

Yang

Kim

2020

Physics Letters B

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A pion mean-field approach allows one to investigate light and singly heavy baryons on an equal footing. In the large Nc limit, the light and singly heavy baryons are viewed respectively as Nc and Nc − 1 valence quarks bound by the pion mean fields created self-consistently, since a heavy quark can be regarded as a static color source in the limit of the infinitely heavy quark mass. The transition magnetic moments of the baryon sextet are determined entirely by using the parameters fixed in the light-baryon sector without any additional parameters introduced. Assuming that the transition E2 moments are small, we are able to compute the radiative decay rates of the baryon sextet. The numerical results are discussed, being compared with those from other approaches.

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Section: Transition Magnetic Moments and Partial Decay Widths Ofmentioning

confidence: 93%

Magnetic transitions and radiative decays of singly heavy baryons

Yang

Kim

2020

Physics Letters B

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“…As already mentioned, the γ * N → ∆ transition is the only one with experimental data available [36][37][38][39][40][41][42][43][44]. Therefore, most of the theoretical work focused on this transition.…”

Section: Nucleon -Delta Transitionmentioning

confidence: 99%

Electromagnetic transition form factors of baryons in the space-like momentum region

2018

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We present results from a calculation of the electromagnetic transition form factors between ground-state octet and decuplet baryons as well as the octet-only Σ 0 to Λ transition. We work in the combined framework of Dyson-Schwinger equations and covariant Bethe-Salpeter equations with all elements, the baryon three body wave function, the quark propagators and the dressed quark-photon vertex determined from a well-established, momentum dependent approximation for the quark-gluon interaction. We discuss in particular the similarities among the different transitions as well as the differences induced by SU (3)-isospin symmetry breaking. We furthermore provide estimates for the slopes of the electric and magnetic Σ 0 to Λ transitions at the zero photon momentum point.

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“…The measurement of the two polarization components provides a very valuable additional observable, which helps to separate G e and G m . For the polarization transfer data [68][69][70][71][72][73][74][75][76][77][78][79], the overall normalization is less of an issue, as the observable of interest is a ratio of two polarizations.…”

Section: Datamentioning

confidence: 99%

Proton Charge Radius from Electron Scattering

Sick

2017

Atoms

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Abstract:The rms-radius R of the proton charge distribution is a fundamental quantity needed for precision physics. This radius, traditionally determined from elastic electron-proton scattering via the slope of the Sachs form factor G e (q 2 ) extrapolated to momentum transfer q 2 = 0, shows a large scatter. We discuss the approaches used to analyze the e-p data, partly redo these analyses in order to identify the sources of the discrepancies and explore alternative parameterizations. The problem lies in the model dependence of the parameterized G(q) needed for the extrapolation. This shape of G(q < q min ) is closely related to the shape of the charge density ρ(r) at large radii r, a quantity that is ignored in most analyses. When using our physics knowledge about this large-r density together with the information contained in the high-q data, the model dependence of the extrapolation is reduced, and different parameterizations of the pre-2010 data yield a consistent value for R = 0.887 ± 0.012 fm. This value disagrees with the more precise value 0.8409 ± 0.0004 fm determined from the Lamb shift in muonic hydrogen.

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Measurement of the Recoil Polarization in thep(e→,e′

Cited by 89 publications

References 25 publications

Magnetic transitions and radiative decays of singly heavy baryons

Magnetic transitions and radiative decays of singly heavy baryons

Electromagnetic transition form factors of baryons in the space-like momentum region

Proton Charge Radius from Electron Scattering

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