Please use this identifier to cite or link to this item:
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4842
Title: | Determination of the strong coupling constant αS(mZ) from measurements of inclusive W± and Z boson production cross sections in proton-proton collisions at √s = 7 and 8 TeV |
Authors: | CMS Collaboration Sirunyan, A. M. DUBE, SOURABH KANSAL, B. KAPOOR, A. KOTHEKAR, K. PANDEY, S. RANE, A. RASTOGI, A. SHARMA, SEEMA et al. Dept. of Physics |
Keywords: | Hadron-Hadron scattering (experiments) Particle and resonance production TOC-JUN-2020 2020 2020-JUN-WEEK4 |
Issue Date: | Jun-2020 |
Publisher: | Springer Nature |
Citation: | Journal of High Energy Physics, 2020(06). |
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-next- to-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. |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4842 https://doi.org/10.1007/JHEP06(2020)018 |
ISSN: | 1126-6708 1029-8479 |
Appears in Collections: | JOURNAL ARTICLES |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.