The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Scale setting from a mixed action with Wilson twisted mass valence quarks

10 Aug 2022, 14:20

20m

CP1-HSZ/0.002 (CP1-HSZ) - HS4 (CP1-HSZ)

Oral Presentation Standard Model Parameters Standard Model Parameters

Speaker

Alejandro Saez (IFT UAM-CSIC)

Description

We present preliminary results for a scale setting procedure based on a mixed action strategy, consisting of Wilson twisted mass valence fermions at maximal twist on CLS ensembles with $N_f=2+1$ flavours of O(a)-improved Wilson sea quarks. Once the matching of valence and sea quark masses is performed, universality tests are carried out by comparing the continuum-limit results of the mixed action setup to those of the regularisation based solely on O(a)-improved Wilson fermions. The scale setting uses the pion and kaon decay constants, in units of flow scale $t_0$, obtained from combining computations with the unitary Wilson action and the mixed action. The proper isolation of ground states as well as the continuum-chiral extrapolations are evaluated through model variation techniques. An update on the determination of $t_0$ will be presented.

Presentation materials

Lattice2022_v_3.pdf