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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2502.07674 |
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| _version_ | 1866914115671293952 |
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| author | Cè, Marco Giusti, Leonardo Laudicina, Davide Pepe, Michele Rescigno, Pietro |
| author_facet | Cè, Marco Giusti, Leonardo Laudicina, Davide Pepe, Michele Rescigno, Pietro |
| contents | We determine the hyperfine splitting in the QCD flavour non-singlet mesonic screening masses at asymptotically large temperatures. The analytic calculation is carried out in the dimensionally-reduced effective theory where the first non-zero contribution is of $O(g^4)$ in the QCD coupling constant $g$. Apart for its own theoretical interest, this result provides instrumental information to interpret and to parameterize non-perturbative data that are being produced at very high temperatures by numerical simulations of lattice QCD. Indeed, the comparison with existing non-perturbative results shows that higher order (non-perturbative) contributions in $g$ are needed to explain the data up to the highest temperatures explored, which is of the order of the electroweak scale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07674 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The hyperfine splitting in QCD mesonic screening masses at asymptotically large temperatures Cè, Marco Giusti, Leonardo Laudicina, Davide Pepe, Michele Rescigno, Pietro High Energy Physics - Lattice We determine the hyperfine splitting in the QCD flavour non-singlet mesonic screening masses at asymptotically large temperatures. The analytic calculation is carried out in the dimensionally-reduced effective theory where the first non-zero contribution is of $O(g^4)$ in the QCD coupling constant $g$. Apart for its own theoretical interest, this result provides instrumental information to interpret and to parameterize non-perturbative data that are being produced at very high temperatures by numerical simulations of lattice QCD. Indeed, the comparison with existing non-perturbative results shows that higher order (non-perturbative) contributions in $g$ are needed to explain the data up to the highest temperatures explored, which is of the order of the electroweak scale. |
| title | The hyperfine splitting in QCD mesonic screening masses at asymptotically large temperatures |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2502.07674 |