From Bethe–Salpeter Wave functions to Generalised Parton Distributions
We review recent works on the modelling of generalised parton distributions within the Dyson–Schwinger formalism. We highlight how covariant computations, using the impulse approximation, allows one to fulfil most of the theoretical constraints of the GPDs. Specific attention is brought to chiral pr...
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| Veröffentlicht in: | Few-body systems 2016-09, Vol.57 (9), p.729-772 |
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| container_title | Few-body systems |
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| creator | Mezrag, C. Moutarde, H. Rodríguez-Quintero, J. |
| description | We review recent works on the modelling of generalised parton distributions within the Dyson–Schwinger formalism. We highlight how covariant computations, using the impulse approximation, allows one to fulfil most of the theoretical constraints of the GPDs. Specific attention is brought to chiral properties and especially the so-called soft pion theorem, and its link with the Axial-Vector Ward–Takahashi identity. The limitation of the impulse approximation are also explained. Beyond impulse approximation computations are reviewed in the forward case. Finally, we stress the advantages of the overlap of lightcone wave functions, and possible ways to construct covariant GPD models within this framework, in a two-body approximation. |
| doi_str_mv | 10.1007/s00601-016-1119-8 |
| format | Article |
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(ANL), Argonne, IL (United States)</creatorcontrib><title>From Bethe–Salpeter Wave functions to Generalised Parton Distributions</title><title>Few-body systems</title><addtitle>Few-Body Syst</addtitle><description>We review recent works on the modelling of generalised parton distributions within the Dyson–Schwinger formalism. We highlight how covariant computations, using the impulse approximation, allows one to fulfil most of the theoretical constraints of the GPDs. Specific attention is brought to chiral properties and especially the so-called soft pion theorem, and its link with the Axial-Vector Ward–Takahashi identity. The limitation of the impulse approximation are also explained. Beyond impulse approximation computations are reviewed in the forward case. 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| subjects | Approximation Atomic Computation Double Distributions Dyson-Schwinger Equations Formalism Generalised Parton Distributions Hadrons Heavy Ions Impulses Mathematical analysis Mathematical models MATHEMATICS AND COMPUTING Molecular Nuclear Experiment Nuclear Physics Optical and Plasma Physics Particle and Nuclear Physics Partons Physics Physics and Astronomy pion Pions Review Wave functions |
| title | From Bethe–Salpeter Wave functions to Generalised Parton Distributions |
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