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Showing 2011 · hep-phShow all

11 papers · 2 filters

hep-ph2011

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…

hep-ph2011

Spin microscopy with enhanced Wilson lines in the TMD parton densities

I. O. Cherednikov, A. I. Karanikas, N. G. Stefanis

We discuss the possibility of non-minimal gauge invariance of transverse-momentum-dependent parton densities (TMDs) that allows direct access to the spin degrees of freedom of ferm…

hep-ph2011★ 3 cited

Parametrizing Compton form factors with neural networks

Kresimir Kumericki, Dieter Mueller, Andreas Schafer

We describe a method, based on neural networks, of revealing Compton form factors in the deeply virtual region. We compare this approach to standard least-squares model fitting bot…

hep-ph2011

Evaluation of the Nucleon Helicity Flip Form Factor using One and Two Virtual Photons

Thorsten Sachs, Patrick Sturm

In this work, we will evaluate the nucleon helicity flip form factor at the limit of large momentum transfer. Hereby, we will study the exchange of one and two virtual photons sepa…

hep-ph2011★ 3 cited

Pion-photon transition form factor. Living on the QCD frontier

N. G. Stefanis

An analysis of all available data (CELLO, CLEO, \babar) in the range GeV for the pion-photon transition form factor in terms of light-cone sum rules with next-to-leadi…

hep-ph2011★ 8 cited

Pion-photon transition form factor using light-cone sum rules: theoretical results, expectations, and a global-data fit

A. P. Bakulev, S. V. Mikhailov, A. V. Pimikov +1

A global fit to the data from different collaborations (CELLO, CLEO, BaBar) on the pion-photon transition form factor is carried out using light-cone sum rules. The analysis includ…