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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.13864 |
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| _version_ | 1866913468955754496 |
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| author | CMS Collaboration |
| author_facet | CMS Collaboration |
| contents | Energy correlators that describe energy-weighted distances between two or three particles in a jet are measured using an event sample of $\sqrt{s}$ = 13 TeV proton-proton collisions collected by the CMS experiment and corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The measured distributions are consistent with the trends in the simulation that reveal two key features of the strong interaction: confinement and asymptotic freedom. By comparing the ratio of the measured three- and two-particle energy correlator distributions with theoretical calculations that resum collinear emissions at approximate next-to-next-to-leading logarithmic accuracy matched to a next-to-leading order calculation, the strong coupling is determined at the Z boson mass: $α_\mathrm{S}(m_\mathrm{Z})$ = 0.1229 $^{+0.0040}_{-0.0050}$, the most precise $α_\mathrm{S}(m_\mathrm{Z})$ value obtained using jet substructure observables. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_13864 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Measurement of energy correlators inside jets and determination of the strong coupling $α_\mathrm{S}(m_\mathrm{Z})$ CMS Collaboration High Energy Physics - Experiment Energy correlators that describe energy-weighted distances between two or three particles in a jet are measured using an event sample of $\sqrt{s}$ = 13 TeV proton-proton collisions collected by the CMS experiment and corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The measured distributions are consistent with the trends in the simulation that reveal two key features of the strong interaction: confinement and asymptotic freedom. By comparing the ratio of the measured three- and two-particle energy correlator distributions with theoretical calculations that resum collinear emissions at approximate next-to-next-to-leading logarithmic accuracy matched to a next-to-leading order calculation, the strong coupling is determined at the Z boson mass: $α_\mathrm{S}(m_\mathrm{Z})$ = 0.1229 $^{+0.0040}_{-0.0050}$, the most precise $α_\mathrm{S}(m_\mathrm{Z})$ value obtained using jet substructure observables. |
| title | Measurement of energy correlators inside jets and determination of the strong coupling $α_\mathrm{S}(m_\mathrm{Z})$ |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2402.13864 |