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http://bura.brunel.ac.uk/handle/2438/21088| Title: | Determination of the strong coupling constant α <inf>S</inf>(m<inf>Z</inf>) from measurements of inclusive W<sup> ±</sup> and Z boson production cross sections in proton-proton collisions at √s = 7 and 8 TeV |
| Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Bergauer, T Dragicevic, M Erö, J Escalante Del Valle, A Flechl, M Frühwirth, R Jeitler, M Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Rad, N Schieck, J Schöfbeck, R Spanring, M Waltenberger, W Wulz, CE Zarucki, M Drugakov, V Mossolov, V Suarez Gonzalez, J Darwish, MR De Wolf, EA Di Croce, D Janssen, X Lelek, A Pieters, M Rejeb Sfar, H Van Haevermaet, H Van Mechelen, P Van Putte, S Van Remortel, N Blekman, F Bols, ES Chhibra, SS D’Hondt, J De Clercq, J Lontkovskyi, D Lowette, S Marchesini, I Moortgat, S Python, Q Tavernier, S Van Doninck, W Van Mulders, P Beghin, D Bilin, B Clerbaux, B De Lentdecker, G Delannoy, H Dorney, B Favart, L Grebenyuk, A Kalsi, AK Moureaux, L Popov, A Postiau, N Starling, E Thomas, L Vander Velde, C Vanlaer, P Vannerom, D Cornelis, T Dobur, D Khvastunov, I Niedziela, M Roskas, C Skovpen, K Tytgat, M Verbeke, W Vermassen, B Vit, M Bondu, O Bruno, G Caputo, C David, P Delaere, C Delcourt, M Giammanco, A Lemaitre, V Prisciandaro, J Saggio, A Vidal Marono, M Vischia, P Zobec, J Alves, GA Correia Silva, G Hensel, C Moraes, A Belchior Batista Das Chagas, E Carvalho, W Chinellato, J Coelho, E Da Costa, EM Da Silveira, GG |
| Keywords: | Hadron-Hadron scattering (experiments);Particle and resonance production |
| Issue Date: | 1-Jun-2020 |
| Publisher: | Springer |
| Citation: | Sirunyan, A.M., Tumasyan, A., Adam, W. et al. 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. J. High Energ. Phys. 2020, 18 (2020). |
| 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://bura.brunel.ac.uk/handle/2438/21088 |
| DOI: | http://dx.doi.org/10.1007/JHEP06(2020)018 |
| ISSN: | 1126-6708 1029-8479 |
| Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| FullText.pdf | 3.71 MB | Adobe PDF | View/Open |
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