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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…
Novel implementation of the multipole expansion to quarkonium hadronic transitions
Antonio Pineda, Jaume Tarrús Castellà
We compute hadronic transitions between heavy quarkonium states with two, or one, pion/eta particles in the final state. We use the multipole expansion but not the twist expansion.…
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…