Journal Article

PUBDB-2023-00006

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation of the scale dependence in the MSR and $\overline{\textrm{MS}}$ top quark mass schemes for the $\mathrm{t}\overline{\mathrm{t}}$ invariant mass differential cross section using LHC data

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

2023
SISSA Trieste

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Please use a persistent id in citations: doi:10.1007/JHEP09(2023)037  doi:10.3204/PUBDB-2023-00006

Report No.: DESY-23-001; UWThPh-2023-1; arXiv:2301.03546

Abstract: The computation of the single-differential top quark-antiquark pair ($\mathrm{t}\overline{\mathrm{t}}$) production cross section at NLO in the fixed-order expansion is examined consistently using the MSR and $\overline{\textrm{MS}}$ short-distance top quark mass schemes. A thorough investigation of the dependence of the $\mathrm{t}\overline{\mathrm{t}}$ invariant mass spectrum on the renormalization scales $R$ and $\mu_m$ of the MSR mass $m_\mathrm{t}^{\textrm{MSR}}(R)$ and $\overline{\textrm{MS}}$ mass $\overline{m}_\mathrm{t}(\mu_m)$, respectively, is carried out. We demonstrate that a scale choice of $R\sim 80$~GeV is important for the stability of the cross-section predictions for the low $\mathrm{t}\overline{\mathrm{t}}$ invariant mass range, which is important for a reliable extraction of the top quark mass. Furthermore, a choice of semi-dynamical renormalization and factorization scales is preferred. These findings are expected to remain valid once non-relativistic quasi-bound state effects are included in the low invariant mass region.

Keyword(s): top: mass ; scale: factorization ; differential cross section: mass ; scale: renormalization ; quark antiquark: pair ; GeV ; nonrelativistic ; stability ; interpretation of experiments: CERN LHC Coll ; mass spectrum ; scale dependence ; Quark Masses ; Top Quark

Note: 19 pages, 6 figures

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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. LHC: CMS
2. LHC: ATLAS

Appears in the scientific report 2023

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Maekelae, T. (Corresponding author)Extern* ; Hoang, A. ; Lipka, K.DESY* ; Moch, S.-O.Extern*
Investigation of the scale dependence in the MSR and $\overline{\textrm{MS}}$ top quark mass schemes for the $\mathrm{t}\overline{\mathrm{t}}$ invariant mass differential cross section using LHC data
[10.3204/PUBDB-2023-00184]     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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