Running of the top quark mass from proton-proton collisions at $\sqrt{s} =$ 13 TeV
(2020) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B803, p. 135263 (2020)
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- Abstract
- The running of the top quark mass is experimentally investigated for the first time. The mass of the top quark in the modified minimal subtraction ($\mathrm{\overline{MS}}$) renormalization scheme is extracted from a comparison of the differential top quark-antiquark ($\mathrm{t\overline{t}}$) cross section as a function of the invariant mass of the $\mathrm{t\overline{t}}$ system to next-to-leading-order theoretical predictions. The differential cross section is determined at the parton level by means of a maximum-likelihood fit to distributions of final-state observables. The analysis is performed using $\mathrm{t\overline{t}}$ candidate events in the e$^\pm\mu^\mp$ channel in proton-proton collision data at a centre-of-mass energy of 13 TeV marc:recorded by the CMS detector at the CERN LHC in 2016, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The extracted running is found to be compatible with the scale dependence predicted by the corresponding renormalization group equation. In this analysis, the running is probed up to a scale of the order of 1 TeV.
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Bondu, O., Bruno, G., Caputo, C., David, P., Delaere, C., Delcourt, M., Giammanco, A., Lemaitre, V., Prisciandaro, J., Saggio, A., Vidal Marono, M., Vischia, P., Zobec, J., CMS Collaboration, & et al. (2020). Running of the top quark mass from proton-proton collisions at $\sqrt{s} =$ 13 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B803, 135263. https://doi.org/10.1016/j.physletb.2020.135263 (Original work published 2020)