Non-perturbative determination of the $N_f=2+1$ QCD sphaleron rate
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911871586533376 |
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| author | Bonanno, Claudio D'Angelo, Francesco D'Elia, Massimo Naviglio, Manuel Maio, Lorenzo |
| author_facet | Bonanno, Claudio D'Angelo, Francesco D'Elia, Massimo Naviglio, Manuel Maio, Lorenzo |
| contents | The strong sphaleron rate, i.e., the rate of real time QCD topological transitions, is a key phenomenological quantity, playing a fundamental role in several physical contexts. In heavy-ion collisions, a non-vanishing rate can lead to the so-called Chiral Magnetic Effect. In early-Universe cosmology, instead, it can be related to the rate of thermal production of QCD axions. In this talk, we present the first reliable fully non-perturbative computation of the strong sphaleron rate in $N_f=2+1$ QCD at the physical point by means of lattice simulations, in a range of temperatures going from 200 MeV to 600 MeV. Our strategy is based on the inversion of lattice correlators via a recently-proposed modified version of the Backus-Gilbert method. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_05857 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-perturbative determination of the $N_f=2+1$ QCD sphaleron rate Bonanno, Claudio D'Angelo, Francesco D'Elia, Massimo Naviglio, Manuel Maio, Lorenzo High Energy Physics - Lattice High Energy Physics - Phenomenology High Energy Physics - Theory The strong sphaleron rate, i.e., the rate of real time QCD topological transitions, is a key phenomenological quantity, playing a fundamental role in several physical contexts. In heavy-ion collisions, a non-vanishing rate can lead to the so-called Chiral Magnetic Effect. In early-Universe cosmology, instead, it can be related to the rate of thermal production of QCD axions. In this talk, we present the first reliable fully non-perturbative computation of the strong sphaleron rate in $N_f=2+1$ QCD at the physical point by means of lattice simulations, in a range of temperatures going from 200 MeV to 600 MeV. Our strategy is based on the inversion of lattice correlators via a recently-proposed modified version of the Backus-Gilbert method. |
| title | Non-perturbative determination of the $N_f=2+1$ QCD sphaleron rate |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2405.05857 |