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arXiv · 2208.11399

Running of the top quark mass at NNLO in QCD

Matteo M. Defranchis·Jan Kieseler·Katerina Lipka·Javier Mazzitelli
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Abstract

The running of the top quark mass ($m_\mathrm{t}$) is probed at the next-to-next-to-leading order in quantum chromodynamics for the first time. The result is obtained by comparing calculations in the modified minimal subtraction ($\mathrm{\overline{MS}}$) renormalisation scheme to the CMS result on differential measurement of the top quark-antiquark ($\mathrm{t\bar{t}}$) production cross section at $\sqrt{s} = 13~\mathrm{TeV}$. The scale dependence of $m_\mathrm{t}$ is extracted as a function of the invariant mass of the $\mathrm{t\bar{t}}$ system, up to an energy scale of about $0.5~\mathrm{TeV}$. The observed running is found to be in good agreement with the three-loop solution of the renormalisation group equations of quantum chromodynamics.

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Matteo M. Defranchis, Jan Kieseler, Katerina Lipka, Javier Mazzitelli. 2022-08-24. Running of the top quark mass at NNLO in QCD. https://doi.org/10.1007/jhep04(2024)125

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