Speaker
Dr
Francesca Margari
(Univ. of Roma Tor Vergata and INFN - Roma Tor Vergata)
Description
Low Mode Average (LMA) is a technique to improve the quality of the signal-to-noise ratio in the long time separation of Euclidean correlation functions. We report on its beneficial impact in computing the vector-vector light connected two-point correlation functions $V_{kk}(t)$ and derived physical quantities in the mixed action lattice setup adopted by ETMC. We focus on preliminary results of the computation within isospin symmetric QCD of the $R$-ratio smeared with Gaussian kernels of widths down to $\sigma\sim200$ MeV, which is enough to appreciate the $\rho$ resonance around 770 MeV, using the Hansen-Lupo-Tantalo spectral-density reconstruction method.
Author
Dr
Francesca Margari
(Univ. of Roma Tor Vergata and INFN - Roma Tor Vergata)
Co-author
ETM Collaboration