Determination of the Gradient Flow Scale \(t_0\) from a Mixed Action with Wilson Twisted Mass Valence Quarks

We perform the scale setting procedure of a mixed action setup consisting of valence Wilson twisted mass fermions at maximal twist on CLS ensembles with \(N_f=2+1\) flavours of \(O(a)\)-improved Wilson sea quarks. We determine the gradient flow scale \(t_0\) using pion and kaon masses and decay cons...

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Published in:arXiv.org 2024-01
Main Authors: Saez, Alejandro, Conigli, Alessandro, Frison, Julien, Herdoíza, Gregorio, Pena, Carlos
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Language:English
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Decay rate
Fermions
Flavor (particle physics)
Gradient flow
Kaons
Pions
Quarks
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Conigli, Alessandro
Frison, Julien
Herdoíza, Gregorio
Pena, Carlos
description We perform the scale setting procedure of a mixed action setup consisting of valence Wilson twisted mass fermions at maximal twist on CLS ensembles with \(N_f=2+1\) flavours of \(O(a)\)-improved Wilson sea quarks. We determine the gradient flow scale \(t_0\) using pion and kaon masses and decay constants in the isospin symmetric limit of QCD as external physical input. We employ model variation techniques to explore the systematic uncertainties in the extraction of the ground state signal of lattice observables, as well as for the continuum-chiral extrapolations. We observe that the combined analysis of the mixed action data with that based on \(O(a)\)-improved Wilson valence quarks, provides an improved control of the extrapolation of \(t_0\) to the physical point.
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subjects Decay rate
Fermions
Flavor (particle physics)
Gradient flow
Kaons
Pions
Quarks
title Determination of the Gradient Flow Scale \(t_0\) from a Mixed Action with Wilson Twisted Mass Valence Quarks
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