Prospects for strong coupling measurement at hadron colliders using soft-drop jet mass
| Autor: | Hannesdottir, Holmfridur S., Pathak, Aditya, Schwartz, Matthew D., Stewart, Iain W. |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
jet [quark]
p p: scattering Nuclear and High Energy Physics higher-order p p scattering FOS: Physical sciences mass [jet] High Energy Physics - Phenomenology (hep-ph) strong interaction: coupling constant jet [gluon] Jets and Jet Substructure strong coupling scattering [p p] gluon: jet ddc:530 Renormalization Group The Strong Coupling quark: jet Factorization correction: nonperturbative quark jet precision measurement jet mass jet: mass gluon jet sensitivity nonperturbative [correction] High Energy Physics - Phenomenology resummation correction nonperturbative hadron coupling constant [strong interaction] |
| Zdroj: | Journal of High Energy Physics Journal of high energy physics 04(4), 087 (2023). doi:10.1007/JHEP04(2023)087 |
| DOI: | 10.3204/PUBDB-2022-05051 |
| Popis: | Journal of high energy physics 04(4), 087 (2023). doi:10.1007/JHEP04(2023)087 We compute the soft-drop jet-mass distribution from $pp$ collisions to NNLL accuracy while including nonperturbative corrections through a field-theory based formalism. Using these calculations, we assess the theoretical uncertainties on an $\alpha_s$ precision measurement due to higher order perturbative effects, nonperturbative corrections, and PDF uncertainty. We identify which soft-drop parameters are well-suited for measuring $\alpha_s$, and find that higher-logarithmic resummation has a qualitatively important effect on the shape of the jet-mass distribution. We find that quark jets and gluon jets have similar sensitivity to $\alpha_s$, and emphasize that experimentally distinguishing quark and gluon jets is not required for an $\alpha_s$ measurement. We conclude that measuring $\alpha_s$ to the 10% level is feasible now, and with improvements in theory a 5% level measurement is possible. Getting down to the 1% level to be competitive with other state-of-the-art measurements will be challenging. Published by SISSA, [Trieste] |
| Databáze: | OpenAIRE |
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