Contribution to a conference proceedings

PUBDB-2025-01993

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Impact of top mass on top differential distributions

Mäkelä, T. (Corresponding author)Extern* ; Hoang, A.Extern* ; Lipka, K.DESY* ; Moch, S.-O.Extern*

2024
Sissa Medialab Trieste, Italy

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Please use a persistent id in citations: doi:10.22323/1.450.0022  doi:10.3204/PUBDB-2025-01993

Abstract: The next-to-leading order single-differential top quark-antiquark pair production cross section predictions are examined consistently using short-distance top quark mass schemes, with the evolution of the mass of the top quark performed in the MSR scheme $m_{\rm t}^{\rm MSR}(\mu)$ for scales $\mu$ below the $\overline{\rm MS}$ top quark mass $\overline{m}_{\rm t}(\overline{m}_{\rm t})$, and in the $\overline{\rm MS}$ scheme $\overline{m}_{\rm t}(\mu)$ for scales above. The implementation of a mass renormalization scale independent of the strong coupling renormalization scale and factorization scale in quantum chromodynamics allows investigating independent dynamical scale variations, and a scale choice of $R\sim 80$ GeV is demonstrated to be important for the stability of the cross-section predictions in the low top quark-antiquark pair invariant mass range.Moreover, a choice of semi-dynamical renormalization and factorization scales is preferred, and the findings are demonstrated in a theoretically consistent extraction of the top quark MSR mass from experimental data.

Keyword(s): top: mass ; top: pair production ; scale: factorization ; scale: renormalization ; mass: renormalization ; higher-order: 1 ; stability ; quantum chromodynamics ; cross section: calculated

Note:

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Contributing Institute(s):

1. LHC/CMS Experiment (CMS)
2. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

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