A tmQCD mixed-action approach to flavour physics
We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, automatic O(a) improvement is preserved for valence observables, apart from small residual O(a)...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201817513018 |
| _version_ | 1818649685776138240 |
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| author | Herdoíza Gregorio Pena Carlos Preti David Romero José Ángel Ugarrio Javier |
| author_facet | Herdoíza Gregorio Pena Carlos Preti David Romero José Ángel Ugarrio Javier |
| author_sort | Herdoíza Gregorio |
| collection | DOAJ |
| description | We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, automatic O(a) improvement is preserved for valence observables, apart from small residual O(a) effects from the sea. A strategy for matching sea and valence is set up, and carried out for Nf = 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. |
| first_indexed | 2024-12-17T01:38:15Z |
| format | Article |
| id | doaj.art-f187ef92f2c643e78660ad34bd7f1961 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T01:38:15Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-f187ef92f2c643e78660ad34bd7f19612022-12-21T22:08:24ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011751301810.1051/epjconf/201817513018epjconf_lattice2018_13018A tmQCD mixed-action approach to flavour physicsHerdoíza GregorioPena CarlosPreti DavidRomero José ÁngelUgarrio JavierWe discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, automatic O(a) improvement is preserved for valence observables, apart from small residual O(a) effects from the sea. A strategy for matching sea and valence is set up, and carried out for Nf = 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.https://doi.org/10.1051/epjconf/201817513018 |
| spellingShingle | Herdoíza Gregorio Pena Carlos Preti David Romero José Ángel Ugarrio Javier A tmQCD mixed-action approach to flavour physics EPJ Web of Conferences |
| title | A tmQCD mixed-action approach to flavour physics |
| title_full | A tmQCD mixed-action approach to flavour physics |
| title_fullStr | A tmQCD mixed-action approach to flavour physics |
| title_full_unstemmed | A tmQCD mixed-action approach to flavour physics |
| title_short | A tmQCD mixed-action approach to flavour physics |
| title_sort | tmqcd mixed action approach to flavour physics |
| url | https://doi.org/10.1051/epjconf/201817513018 |
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