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; Journal of High Energy Physics; Vol. 2020, iss. 6

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; Journal of High Energy Physics; Vol. 2020, iss. 6

Detalles Bibliográficos
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 6.— 2020.— [18, 49 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Otros Autores: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich
Sumario:Title screen
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+0.0024−0.0031αS(mZ)=0.1163−0.0031+0.0024 (CT14), 0.1072+0.0043−0.00400.1072−0.0040+0.0043 (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+0.0025−0.0028αS(mZ)=0.1175−0.0028+0.0025 is determined.
Lenguaje:inglés
Publicado: 2020
Materias:
электронный ресурс
труды учёных ТПУ
Hadron-Hadron scattering (experiments)
Particle and resonance production
Acceso en línea:https://doi.org/10.1007/JHEP06(2020)018
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666139

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