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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2502.07354 |
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| _version_ | 1866913686115844096 |
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| author | Borsányi, S. Capitani, S. Fodor, Z. Godzieba, D. Parotto, P. Vig, R. A. Wong, C. H. |
| author_facet | Borsányi, S. Capitani, S. Fodor, Z. Godzieba, D. Parotto, P. Vig, R. A. Wong, C. H. |
| contents | Minimally doubled fermion actions offer a discretization for two-flavor Quantum Chromodynamics without rooting, but retaining a U(1) chiral symmetry at the same time. The price to pay is a breaking of the hypercubic symmetry, which requires the inclusion and tuning of new counterterms. Similar to staggered quarks, these actions suffer from taste breaking. We perform a mixed action numerical study with the Karsten-Wilczek formulation of minimally doubled fermions on 4stout staggered configurations, generated with physical quark masses, covering a broad range of lattice spacings. We consider a tree-level spatial Naik improvement to mitigate discretization errors. We carry out a non-perturbative tuning of the KW action with and without improvement, and investigate the taste breaking and the approach to the continuum limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07354 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Taste breaking in the minimally doubled Karsten-Wilczek action and its tree-level improvement Borsányi, S. Capitani, S. Fodor, Z. Godzieba, D. Parotto, P. Vig, R. A. Wong, C. H. High Energy Physics - Lattice Minimally doubled fermion actions offer a discretization for two-flavor Quantum Chromodynamics without rooting, but retaining a U(1) chiral symmetry at the same time. The price to pay is a breaking of the hypercubic symmetry, which requires the inclusion and tuning of new counterterms. Similar to staggered quarks, these actions suffer from taste breaking. We perform a mixed action numerical study with the Karsten-Wilczek formulation of minimally doubled fermions on 4stout staggered configurations, generated with physical quark masses, covering a broad range of lattice spacings. We consider a tree-level spatial Naik improvement to mitigate discretization errors. We carry out a non-perturbative tuning of the KW action with and without improvement, and investigate the taste breaking and the approach to the continuum limit. |
| title | Taste breaking in the minimally doubled Karsten-Wilczek action and its tree-level improvement |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2502.07354 |