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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2408.09007 |
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| _version_ | 1866911992916213760 |
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| author | Dawid, Sebastian M. Smith, Wyatt A. Rodas, Arkaitz Perry, Robert J. Fernández-Ramírez, César Swanson, Eric S. Szczepaniak, Adam P. |
| author_facet | Dawid, Sebastian M. Smith, Wyatt A. Rodas, Arkaitz Perry, Robert J. Fernández-Ramírez, César Swanson, Eric S. Szczepaniak, Adam P. |
| contents | The Gribov--Zwanziger scenario attributes the phenomenon of confinement to the instantaneous interaction term in the QCD Hamiltonian in the Coulomb gauge. For a static quark-antiquark pair, it leads to a potential energy that increases linearly with the distance between them. Lattice studies of the SU(2) Yang--Mills theory determined the corresponding (Coulomb) string tension for sources in the fundamental representation, $σ_{C}$, to be about three times larger than the Wilson loop string tension, $σ_F$. It is far above the Zwanziger variational bound, $σ_C \geq σ_F$. We argue that the value established in the literature is artificially inflated. We examine the lattice definition of the instantaneous potential, find the source of the string tension's enhancement, and perform its improved determination in SU(2) lattice gauge theory. We report our conservative estimate for the value of the Coulomb string tension as $σ_C/σ_F = 2.0 \pm 0.4$ and discuss its phenomenological implications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09007 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Coulomb confinement in the Hamiltonian limit Dawid, Sebastian M. Smith, Wyatt A. Rodas, Arkaitz Perry, Robert J. Fernández-Ramírez, César Swanson, Eric S. Szczepaniak, Adam P. High Energy Physics - Lattice Nuclear Theory The Gribov--Zwanziger scenario attributes the phenomenon of confinement to the instantaneous interaction term in the QCD Hamiltonian in the Coulomb gauge. For a static quark-antiquark pair, it leads to a potential energy that increases linearly with the distance between them. Lattice studies of the SU(2) Yang--Mills theory determined the corresponding (Coulomb) string tension for sources in the fundamental representation, $σ_{C}$, to be about three times larger than the Wilson loop string tension, $σ_F$. It is far above the Zwanziger variational bound, $σ_C \geq σ_F$. We argue that the value established in the literature is artificially inflated. We examine the lattice definition of the instantaneous potential, find the source of the string tension's enhancement, and perform its improved determination in SU(2) lattice gauge theory. We report our conservative estimate for the value of the Coulomb string tension as $σ_C/σ_F = 2.0 \pm 0.4$ and discuss its phenomenological implications. |
| title | Coulomb confinement in the Hamiltonian limit |
| topic | High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2408.09007 |