Investigation of the scale dependence in the MSR and MS¯ top quark mass schemes for the t t ¯ invariant mass differential cross section using LHC data

Autor(en)

Toni Mäkelä, André H. Hoang, Katerina Lipka, Sven Olaf Moch

Abstrakt

The computation of the single-differential top quark-antiquark pair (t t ¯) production cross section at NLO in the fixed-order expansion is examined consistently using the MSR and MS¯ short-distance top quark mass schemes. A thorough investigation of the dependence of different regions of the t t ¯ invariant mass spectrum on the renormalization scales R and μm of the MSR mass mtMSR (R) and MS¯ mass m¯ t(μm), respectively, is carried out. We demonstrate that a scale choice of R ~ 80 GeV is important for the stability of the cross-section predictions for the low t 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.

Organisation(en)

Forschungsplattform Internationales Erwin Schrödinger Institut für Mathematik und Physik, Teilchenphysik

Externe Organisation(en)

Deutsches Elektronen-Synchrotron DESY, National Centre for Nuclear Research (NCBJ), Bergische Universität Wuppertal, Universität Hamburg

Journal

Journal of High Energy Physics

Band

2023

Anzahl der Seiten

21

ISSN

1029-8479

DOI

https://doi.org/10.48550/arXiv.2301.03546

Publikationsdatum

09-2023

Peer-reviewed

Ja

ÖFOS 2012

103012 Hochenergiephysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/investigation-of-the-scale-dependence-in-the-msr-and-ms-top-quark-mass-schemes-for-the-t-t--invariant-mass-differential-cross-section-using-lhc-data(37de2437-f73b-4843-a816-59b213e81a67).html