398 citations · 857 across the 13 of their papers we have counts for
13 papers · 1 filter
Renormalons and power corrections in pseudo- and quasi-GPDs
Vladimir Braun, Maria Koller, Jakob Schoenleber
High-order behavior of the perturbative expansion for short-distance observables in QCD is intimately related to the contributions of small momenta in the corresponding Feynman dia…
Finite-t and target mass corrections to deeply virtual Compton scattering
V. M. Braun, A. N. Manashov, B. Pirnay
We carry out the first complete calculation of kinematic power corrections ~t/Q^2 and ~m^2/Q^2 to the helicity amplitudes of deeply virtual Compton scattering. This result removes…
Finite-t and target mass corrections to DVCS on a scalar target
V. M. Braun, A. N. Manashov, B. Pirnay
Using the formalism developed in [1,2] we carry out the first complete calculation of kinematic power corrections to the helicity amplitudes of deeply-virtual Compton scattering to…
Hard Exclusive Production of Tensor Mesons
V. M. Braun, N. Kivel
We point out that hard exclusive production of tensor mesons with helicity is dominated by the gluon component in the meson wave function and can be used to d…
Renormalons and Power Corrections
M. Beneke, V. M. Braun
Even for short-distance dominated observables the QCD perturbation expansion is never complete. The divergence of the expansion through infrared renormalons provides formal evidenc…
The Operator Product Expansion, Non-perturbative Couplings and the Landau Pole: Lessons from the O(N) -Model
M. Beneke, V. M. Braun, N. Kivel
We obtain the operator product expansion of the self-energy in the O(N) non-linear -model to all orders in the coupling and the large momentum, and to next-to-leading order in 1…
Ultraviolet dominance of power corrections in QCD?
V. M. Braun
I explain current theoretical ideas on higher-twist (hadronization) corrections to physical observables in QCD.
Large-order Behaviour due to Ultraviolet Renormalons in QCD
M. Beneke, V. M. Braun, N. Kivel
Ultraviolet renormalons, contrary to their infrared counterparts, lead to a universal contribution to the large-order behaviour of perturbative expansions in QCD. In this letter, w…
Phenomenology of Power Corrections in Fragmentation Processes in e^+ e^- Annihilation
M. Beneke, V. M. Braun, L. Magnea
We analyse power corrections to longitudinal and transverse fragmentation processes in e^+ e^- annihilation, based on the assumption of ultraviolet dominance of power corrections.…
On the infrared sensitivity of the longitudinal cross section in annihilation
M. Beneke, V. M. Braun, L. Magnea
We have calculated the contributions proportional to to the longitudinal fragmentation function in annihilation to all orders of perturbation theory. We u…
Bloch-Nordsieck cancellations beyond logarithms in heavy particle decays
M. Beneke, V. M. Braun, V. I. Zakharov
We investigate the one-loop radiative corrections to the semileptonic decay of a charged particle at finite gauge boson mass. Extending the Bloch-Nordsieck cancellation of infrared…
Heavy Quark Effective Theory beyond Perturbation Theory: Renormalons, the Pole Mass and the Residual Mass Term
M. Beneke, V. M. Braun
We study the asymptotic behaviour of the perturbative series in the heavy quark effective theory (HQET) using the expansion. We find that this theory suffers from an {\it u…
Instanton contributions to the decay widths
I. I. Balitsky, M. Beneke, V. M. Braun
Contrary to some previous claims, we find a sizable instanton contribution to the finite energy sum rule used to extract the value of the strong coupling from the measured deca…