Towards determination of the strong coupling $α_s(m_Z)$ from four-flavor lattice QCD using the continuous $β$-function method
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arXiv
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866917356536594432 |
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| author | Mandlecha, Yash Bazavov, Alexei Chauhan, Akhil Dai, Mingwei DeTar, Carleton El-Khadra, Aida Gottlieb, Steven Hasenfratz, Anna Hostetler, Leon Kronfeld, Andreas S. Neil, Ethan T. Peterson, Curtis T. Simone, James |
| author_facet | Mandlecha, Yash Bazavov, Alexei Chauhan, Akhil Dai, Mingwei DeTar, Carleton El-Khadra, Aida Gottlieb, Steven Hasenfratz, Anna Hostetler, Leon Kronfeld, Andreas S. Neil, Ethan T. Peterson, Curtis T. Simone, James |
| contents | The precise value of the strong coupling $α_s(m_{Z})$ at the $Z$-boson mass $m_{Z}$ is essential for high-energy phenomenology and precision tests of quantum chromodynamics (QCD). We present the status of a program targeting a $\sim 0.3\%$ determination of $α_s(m_{Z})$ using the renormalization group $β$-function in the infinite volume gradient flow scheme based on lattice QCD simulations of degenerate four-flavor highly improved staggered quark (HISQ) ensembles. In particular, we analyze both tree-level cutoff effects and finite-mass effects. We also outline the next steps of the analysis, including the infinite-volume and continuum extrapolations required for a precise determination of $α_s(m_Z)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_21059 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Towards determination of the strong coupling $α_s(m_Z)$ from four-flavor lattice QCD using the continuous $β$-function method Mandlecha, Yash Bazavov, Alexei Chauhan, Akhil Dai, Mingwei DeTar, Carleton El-Khadra, Aida Gottlieb, Steven Hasenfratz, Anna Hostetler, Leon Kronfeld, Andreas S. Neil, Ethan T. Peterson, Curtis T. Simone, James High Energy Physics - Lattice The precise value of the strong coupling $α_s(m_{Z})$ at the $Z$-boson mass $m_{Z}$ is essential for high-energy phenomenology and precision tests of quantum chromodynamics (QCD). We present the status of a program targeting a $\sim 0.3\%$ determination of $α_s(m_{Z})$ using the renormalization group $β$-function in the infinite volume gradient flow scheme based on lattice QCD simulations of degenerate four-flavor highly improved staggered quark (HISQ) ensembles. In particular, we analyze both tree-level cutoff effects and finite-mass effects. We also outline the next steps of the analysis, including the infinite-volume and continuum extrapolations required for a precise determination of $α_s(m_Z)$. |
| title | Towards determination of the strong coupling $α_s(m_Z)$ from four-flavor lattice QCD using the continuous $β$-function method |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2603.21059 |