TY  - EJOUR
AU  - Bussone, Andrea
AU  - Conigli, Alessandro
AU  - Frison, Julien Francois
AU  - Herdoíza, Gregorio
AU  - Pena, Carlos
AU  - Preti, David
AU  - Sáez, Alejandro
AU  - Ugarrio, Javier
TI  - Hadronic physics from a Wilson fermion mixed-action approach: charm quark mass and D<sub>(s)</sub> meson decay constants
IS  - arXiv:2309.14154
M1  - PUBDB-2024-07631
M1  - arXiv:2309.14154
M1  - IFT-UAM/CSIC-23-114
PY  - 2024
N1  - 44 pages, 21 figures
AB  - We present our first set of results for charm physics, using the mixed-action setup introduced in a companion paper [1]. Maximally twisted Wilson valence fermions are used on a sea of non-perturbatively O(a)-improved Wilson fermions, made up by CLS N<sub> f</sub>=2+1 ensembles. Our charm-sector observables are free from O(am<sub>c</sub>) discretisation effects, without need of tuning any improvement coefficient, and show continuum-limit scaling properties consistent with leading cutoff effects of O(a<sup>2</sup>). We consider a subset of CLS ensembles – including four values of the lattice spacing and pion masses down to 200 MeV – allowing to take the continuum limit and extrapolate to the physical pion mass. A number of techniques are incorporated in the analysis in order to estimate the systematic uncertainties of our results for the charm quark mass and the D<sub>(s)</sub>-meson decay constants. This first study of observables in the charm sector, where the emphasis has been on the control of the methodology, demonstrates the potential of our setup to achieve high-precision results.
KW  - fermion: Wilson (INSPIRE)
KW  - pi: mass (INSPIRE)
KW  - quark: mass (INSPIRE)
KW  - meson: decay (INSPIRE)
KW  - down: mass (INSPIRE)
KW  - fermion: valence (INSPIRE)
KW  - effect: discrete (INSPIRE)
KW  - charm (INSPIRE)
KW  - continuum limit (INSPIRE)
KW  - scaling (INSPIRE)
KW  - lattice (INSPIRE)
KW  - twist (INSPIRE)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2024-07631
UR  - https://bib-pubdb1.desy.de/record/619438
ER  -