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22 papers · 2 filters
On strange SU(3) partners of Theta+
Klaus Goeke, Maxim V. Polyakov, Michal Praszalowicz
We propose a scenario in which Roper octet can mix with a putative antidecuplet of exotic baryons and predict the properties of its strange members. We show that 1795 MeV < M_Sigma…
Renormalization-group anatomy of transverse-momentum dependent parton distribution functions in QCD
N. G. Stefanis, I. O. Cherednikov
The ultraviolet and rapidity divergences of transverse-momentum dependent parton distribution functions with lightlike and transverse gauge links is studied, also incorporating a s…
Pion Form Factor in QCD Sum Rules with Nonlocal Condensates and in the Local-Duality Approach
Alexander P. Bakulev, A. V. Pimikov, N. G. Stefanis
We discuss the QCD sum-rule approach for the spacelike electromagnetic pion form factor in the approximation. We show that the nonlocality of the condensates is a key poin…
Lorentz invariance relations and Wandzura-Wilczek approximation
T. Teckentrup, A. Metz, P. Schweitzer
A complete list of the so-called Lorentz invariance relations between parton distribution functions is given and some of their consequences are discussed, such as the Burkhardt-Cot…
Pion transition form factor at the two-loop level vis-à-vis experimental data
S. V. Mikhailov, N. G. Stefanis
We use light-cone QCD sum rules to calculate the pion-photon transition form factor, taking into account radiative corrections up to the next-to-next-to-leading order of perturbati…
Nonlocal condensates and pion form factor
A. V. Pimikov, A. P. Bakulev, N. G. Stefanis
We review a nonlocal-condensate approach and its application in QCD sum rules for the spacelike electromagnetic pion form factor. It is shown that the nonlocality of the condensate…