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Next-to-leading order corrections to deeply virtual production of pseudoscalar mesons
G. Duplančić, D. Müller, K. Passek-Kumerički
We complete the perturbative next-to-leading order corrections to the hard scattering amplitudes of deeply virtual meson leptoproduction processes at leading twist-two level by pre…
On the equivalence of GPD representations
Dieter Müller, Kirill Semenov-Tian-Shansky
Phenomenological representations of generalized parton distributions (GPDs) implementing the non-trivial field theoretical requirements are employed in the present day strategies f…
Description and interpretation of DVCS measurements
Krešimir Kumerički, Dieter Müller
Having in mind the well-known limitations of certain models of generalized parton distributions (GPDs), we show that the allegedly universal GPDs, describing both deeply virtual Co…
Covariance constraints for light front wave functions
Dieter Müller
Light front wave functions (LFWFs) are often utilized to model parton distributions and form factors where their transverse and longitudinal momenta are tied to each other in some…
The concept of phenomenological light-front wave functions -- Regge improved diquark model predictions
Dieter Müller, Dae Sung Hwang
We introduce a classification scheme for parton distribution models and we model generalized parton distributions (GPDs), their form factors, and parton distribution functions (PDF…
Generalized Parton Distributions: visions, basics, and realities
Dieter Müller
An introductory to generalized parton distributions is given which emphasizes their spectral property and its uses as well as the equivalence of various GPD representations. Furthe…
Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite- and target mass corrections
Vladimir M. Braun, Alexander N. Manashov, Dieter Mueller +1
We carry out the first complete calculation of kinematic power corrections and to several key observables in Deeply Virtual Compton Scattering. The issu…
Towards a fitting procedure to deeply virtual meson production -- the next-to-leading order case --
Dieter Mueller, Tobias Lautenschlager, Kornelija Passek-Kumericki +1
Based on the collinear factorization approach, we present a comprehensive perturbative next-to-leading (NLO) analysis of deeply virtual meson production (DVMP). Our representation…
Deeply Virtual Compton Scattering at a Proposed High-Luminosity Electron-Ion Collider
Elke-Caroline Aschenauer, Salvatore Fazio, Kresimir Kumericki +1
Several observables for the deeply virtual Compton scattering process have been simulated in the kinematic regime of a proposed Electron-Ion Collider to explore the possible impact…
HERMES impact for the access of Compton form factors
Kresimir Kumericki, Dieter Mueller, Morgan Murray
We utilize the DVCS asymmetry measurements of the HERMES collaboration for access to Compton form factors in the deeply virtual regime and to generalized parton distributions. In p…
A fresh look at exclusive electroproduction of light vector mesons
Mantas Meskauskas, Dieter Mueller
Relying on the collinear factorization approach, we demonstrate that H1 and ZEUS measurements of exclusive light vector meson and photon electroproduction cross sections can be sim…
Neural network generated parametrizations of deeply virtual Compton form factors
Kresimir Kumericki, Dieter Mueller, Andreas Schafer
We have generated a parametrization of the Compton form factor (CFF) H based on data from deeply virtual Compton scattering (DVCS) using neural networks. This approach offers an es…
Towards a global analysis of generalized parton distributions
Kresimir Kumericki, Dieter Mueller
We discuss the complexity of GPD phenomenology, comment on the technological needs for a global analysis, and report on model and neural network fits to the photon electroproductio…
Exclusive electroproduction revisited: treating kinematical effects
A. V. Belitsky, D. Mueller
Generalized parton distributions of the nucleon are accessed via exclusive leptoproduction of the real photon. While earlier analytical considerations of phenomenological observabl…
Deeply virtual Compton scattering at small x_B and the access to the GPD H
Kresimir Kumericki, Dieter Mueller
We give a partonic interpretation for the deeply virtual Compton scattering (DVCS) measurements of the H1 and ZEUS collaborations in the small-x_B region in terms of generalized pa…
Fitting DVCS at NLO and beyond
K. Kumerički, D. Müller, K. Passek-Kumerički
We outline the twist-two analysis of deeply virtual Compton scattering (DVCS)within the conformal partial wave expansion of the amplitude, represented as a Mellin--Barnes integral.…
Generalized Parton Distributions -- theoretical review --
D. Müller
In this talk an introduction to generalized parton distributions is given. Recent developments are shortly reviewed, including non-perturbative calculations, phenomenological aspec…
Nucleon hologram with exclusive leptoproduction
A. V. Belitsky, D. Müller
Hard exclusive leptoproductions of real photons, lepton pairs and mesons are the most promising tools to unravel the three-dimensional picture of the nucleon, which cannot be deduc…
Spin effects in deeply virtual Compton scattering
A. V. Belitsky, A. Kirchner, D. Müller
We consider the azimuthal angle dependence in the cross section of the hard leptoproduction of a photon on a nucleon target. We show that this dependence allows to define observabl…
Hard exclusive meson production at next-to-leading order
A. V. Belitsky, D. Müller
We evaluate perturbative next-to-leading order corrections to the hard exclusive leptoproduction of pi+ mesons on a transversely polarized proton target. A model dependent study sh…
Twist-three observables in deeply virtual Compton scattering on the nucleon
A. V. Belitsky, A. Kirchner, D. Müller +1
We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal ang…
Resummation of target mass corrections in two-photon processes: twist-two sector
A. V. Belitsky, D. Müller
We develop a formalism for the resummation of target mass corrections in off-forward two-photon amplitudes given by a chronological product of electromagnetic currents, arising in…
Twist-three analysis of photon electroproduction with pion
A. V. Belitsky, D. Müller, A. Kirchner +1
We study twist-three effects in spin, charge, and azimuthal asymmetries in deeply virtual Compton scattering on a spin-zero target. Contributions which are power suppressed in 1/Q…
Superconformal constraints for QCD conformal anomalies
A. V. Belitsky, D. Müller
Anomalous superconformal Ward identities and commutator algebra in N = 1 super-Yang-Mills theory give rise to constraints between the QCD special conformal anomalies of conformal c…