Determination of the strong coupling constant alpha(S)(m(Z)) from measurements of inclusive W-+/- and Z boson production cross sections in proton-proton collisions at root s=7 and 8 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Bergauer, Thomas and Md. Ali, Mohd. Adli (2020) Determination of the strong coupling constant alpha(S)(m(Z)) from measurements of inclusive W-+/- and Z boson production cross sections in proton-proton collisions at root s=7 and 8 TeV. Journal of High Energy Physics, 2020 (6). pp. 1-49. ISSN 1126-6708 E-ISSN 1029-8479

	PDF - Published Version Restricted to Repository staff only Download (3MB) | Request a copy
Preview	PDF (Scopus) - Supplemental Material Download (229kB) | Preview
Preview	PDF (wos) - Supplemental Material Download (759kB) | Preview

Abstract

Twelve measurements of inclusive cross sections of W± and Z boson production, performed in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, are compared with perturbative quantum chromodynamics calculations at next-to-nextto-leading order (NNLO) accuracy obtained with the CT14, HERAPDF2.0, MMHT14, and NNPDF3.0 parton distribution functions (PDFs). Data and theory agree well for all PDF sets, taking into account the experimental and theoretical uncertainties. A novel procedure is employed to extract the strong coupling constant at the Z pole mass from a detailed comparison of all the experimental fiducial cross sections to the corresponding NNLO theoretical predictions, yielding αS (mZ) = 0.1163+0.0024 −0.0031 (CT14), 0.1072+0.0043 −0.0040 (HERAPDF2.0), 0.1186 ± 0.0025 (MMHT14), and 0.1147 ± 0.0023 (NNPDF3.0). Using the results obtained with the CT14 and MMHT14 PDFs, which yield the most robust and stable αS (mZ) extractions, a value αS (mZ) = 0.1175+0.0025 −0.0028 is determined.

Item Type:	Article (Journal)
Additional Information:	7861/87992
Uncontrolled Keywords:	Hadron-Hadron scattering (experiments), Particle and resonance production
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	21 Jan 2021 21:15
Last Modified:	21 Jan 2021 21:15
URI:	http://irep.iium.edu.my/id/eprint/87992

Actions (login required)

View Item