A tmQCD mixed-action approach to flavour physics
| Autor: | Gregorio Herdoiza, José Romero, Carlos Pena, David Preti, Javier Ugarrio |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Quark Particle physics Valence (chemistry) 010308 nuclear & particles physics QC1-999 High Energy Physics::Lattice Computer Science::Information Retrieval High Energy Physics - Lattice (hep-lat) Nuclear Theory High Energy Physics::Phenomenology Flavour FOS: Physical sciences Observable Fermion 01 natural sciences Pseudoscalar meson High Energy Physics - Lattice Isospin 0103 physical sciences High Energy Physics::Experiment 010306 general physics Scaling |
| Zdroj: | EPJ Web of Conferences, Vol 175, p 13018 (2018) |
| ISSN: | 2100-014X |
| DOI: | 10.1051/epjconf/201817513018 |
| Popis: | We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively ${\rm O}(a)$ improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, automatic ${\rm O}(a)$ improvement is preserved for valence observables, apart from small residual ${\rm O}(a)$ effects from the sea. A strategy for matching sea and valence is set up, and carried out for $N_\mathrm{f}=2+1$ CLS ensembles with open boundary conditions at several simulation points. The scaling of basic light-quark observables such as the pseudoscalar meson decay constant is studied, as well as the isospin splitting of pseudoscalar meson masses. Comment: 11 pages, 5 figures, Proceedings of the 35th International Symposium on Lattice Field Theory (Lattice 2017), 18-24 June 2017, Granada, Spain |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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