290 citations · 1.2k across the 30 of their papers we have counts for
31 papers
Perturbative Expansions in QCD Improved by Conformal Mappings of the Borel Plane
Irinel Caprini, Jan Fischer, Gauhar Abbas +1
Perturbation expansions appear to be divergent series in many physically interesting situations, including in quantum field theories like quantum electrodynamics (QED) and quantum…
Expansions of hadronic spectral function moments in a nonpower QCD perturbation theory with tamed large order behavior
Gauhar Abbas, B. Ananthanarayan, Irinel Caprini +1
The moments of the hadronic spectral functions are of interest for the extraction of the strong coupling and other QCD parameters from the hadronic decays of the lepton.…
Perturbative expansion of the QCD Adler function improved by renormalization-group summation and analytic continuation in the Borel plane
Gauhar Abbas, B. Ananthanarayan, Irinel Caprini +1
We examine the large-order behaviour of a recently proposed renormalization-group-improved expansion of the Adler function in perturbative QCD, which sums in an analytically closed…
Expansion functions in perturbative QCD and the determination of
Irinel Caprini, Jan Fischer
The conventional series in powers of the coupling in perturbative QCD have zero radius of convergence and fail to reproduce the singularity of the QCD correlators like the Adler fu…
Asymptotic power series of field correlators
Irinel Caprini, Jan Fischer, Ivo Vrkoč
We address the problem of ambiguity of a function determined by an asymptotic perturbation expansion. Using a modified form of the Watson lemma recently proved elsewhere, we discus…
New perturbation expansions in quantum chromodynamics and the determination of
Irinel Caprini, Jan Fischer
We consider a new class of perturbation expansions, which incorporate in a systematic way the available information about the divergent character of the perturbation series in QCD.…