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• W3011950692 abstract "We develop a covariant model for the $gamma^ast N to N(1535)$ transition in the timelike kinematical region, the region where the square momentum transfer $q^2$ is positive. Our starting point is the covariant spectator quark model constrained by data in the spacelike kinematical region ($Q^2 = -q^2 >0$). The model is used to estimate the contributions of valence quarks to the transition form factors, and one obtains a fair description of the Dirac form factor at intermediate and large $Q^2$. For the Pauli form factor there is evidence that beyond the quark-core contributions there are also significant contributions of meson cloud effects. Combining the quark-core model with an effective description of the meson cloud effects, we derive a parametrization of the spacelike data that can be extended covariantly to the timelike region. This extension enabled us to estimate the Dalitz decay widths of the $N(1535)$ resonance, among other observables. Our calculations can help in the interpretation of the present experiments at HADES ($pp$ collisions and others)." @default.
• W3011950692 created "2020-03-23" @default.
• W3011950692 creator A5003700298 @default.
• W3011950692 creator A5010720860 @default.
• W3011950692 date "2020-06-11" @default.
• W3011950692 modified "2023-10-11" @default.
• W3011950692 title "Covariant model for the Dalitz decay of the N(1535) resonance" @default.
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• W3011950692 doi "https://doi.org/10.1103/physrevd.101.114008" @default.
• W3011950692 hasPublicationYear "2020" @default.

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