32 citations · 66 across the 5 of their papers we have counts for
4 papers · 1 filter
Form factor in lightcone sum rules combined with renormalization-group summation vs experimental data
C. Ayala, S. V. Mikhailov, A. V. Pimikov +1
We consider the lightcone sum-rule (LCSR) description of the pion-photon transition form factor in combination with the renormalization group of QCD. The emerging scheme represents…
Hyperasymptotic approximation to the operator product expansion
Cesar Ayala, Xabier Lobregat, Antonio Pineda
These proceedings review recent work on hyperasymptotic constructions to the operator product expansion. Quantities we consider are the static potential and the pole mass.
Hyperasymptotic approximation to the top, bottom and charm pole mass
Cesar Ayala, Xabier Lobregat, Antonio Pineda
We construct hyperasymptotic expansions for the heavy quark pole mass regulated using the principal value (PV) prescription. We apply such hyperasymptotic expansions to the m…
Superasymptotic and hyperasymptotic approximation to the operator product expansion
Cesar Ayala, Xabier Lobregat, Antonio Pineda
Given an observable and its operator product expansion (OPE), we present expressions that carefully disentangle truncated sums of the perturbative series in powers of from the…