TY  - JOUR
AU  - Nada, A.
AU  - Ramos, A.
PY  - 2021
DA  - 2021//
TI  - An analysis of systematic effects in finite size scaling studies using the gradient flow
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 1
EP  - 19pp
VL  - 81
IS  - 1
PB  - Springer
AB  - We propose a new strategy for the determination of the step scaling function sigma (u) in finite size scaling studies using the gradient flow. In this approach the determination of sigma (u) is broken in two pieces: a change of the flow time at fixed physical size, and a change of the size of the system at fixed flow time. Using both perturbative arguments and a set of simulations in the pure gauge theory we show that this approach leads to a better control over the continuum extrapolations. Following this new proposal we determine the running coupling at high energies in the pure gauge theory and re-examine the determination of the Lambda -parameter, with special care on the perturbative truncation uncertainties.
SN  - 1434-6044
UR  - https://arxiv.org/abs/2007.12862
UR  - https://doi.org/10.1140/epjc/s10052-020-08759-1
DO  - 10.1140/epjc/s10052-020-08759-1
LA  - English
N1  - WOS:000606481000001
ID  - Nada+Ramos2021
ER  -