CERN Accelerating science

Article
Report number	arXiv:1907.01435
Title	$\alpha_s$(2019): Precision measurements of the QCD coupling
Author(s)	d'Enterria, David (CERN) ; Kluth, Stefan (Munich, Max Planck Inst.) ; Alekhin, S. (Hamburg U.) ; Baikov, P.A. (Lomonosov Moscow State U.) ; Banfi, A. (Sussex U.) ; Barreiro, F. (Madrid, Autonoma U.) ; Bazavov, A. (Michigan State U., East Lansing (main)) ; Bethke, S. ; Blümlein, J. (DESY, Zeuthen) ; Boito, D. (Sao Paulo U.) ; Brambilla, N. (Munich, Tech. U.) ; Britzger, D. (Munich, Max Planck Inst.) ; Brodsky, S.J. (SLAC) ; Camarda, S. (CERN) ; Chetyrkin, K.G. (KIT, Karlsruhe) ; d'Enterria, D. (CERN) ; Dalla Brida, M. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Tormo, X. Garcia, I (Bern U.) ; Golterman, M. (San Francisco State U.) ; Horsley, R. (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Huston, J. (Michigan State U., East Lansing (main)) ; Jamin, M. (Barcelona, IFAE) ; Kardos, A. (Debrecen U.) ; Keshavarzi, A. (Mississippi U.) ; Kluth, S. (Munich, Tech. U.) ; Kühn, J. (KIT, Karlsruhe) ; Maltman, K. (Toronto U. ; Adelaide U.) ; Miravitllas, R. (Barcelona, IFAE ; Barcelona, Autonoma U.) ; Moch, S.-O. (Hamburg U.) ; Monni, P.F. (CERN) ; Nomura, D. (KEK, Tsukuba) ; Onogi, T. (Osaka U.) ; Pérez-Ramos, R. (IPSA, Paris) ; Peris, S. (Barcelona, Autonoma U.) ; Petreczky, P. (Brookhaven) ; Pires, J. (Lisbon, CFTP ; LIP, Lisbon) ; Poldaru, A. (Munich, Max Planck Inst.) ; Rabbertz, K. (KIT, Karlsruhe) ; Ringer, F. (LBNL, Berkeley) ; Sint, S. (Trinity Coll., Dublin) ; Sommer, R. (DESY, Zeuthen) ; Somogyi, G. (MTA-DE, Debrecen) ; Soto, J. (Barcelona U.) ; Szőr, Z. (Mainz U.) ; Takaura, H. (Kyushu U.) ; Teubner, T. (Liverpool U.) ; Trócsányi, Z. (Debrecen U. ; Eotvos U.) ; Tulipánt, Z. (Debrecen U.) ; Vairo, A. (Munich, Tech. U.) ; Weber, J.H. (Michigan State U., East Lansing (main)) ; Weichen, X. (LMU Munich (main)) ; Verbytskyi, A. (Munich, Max Planck Inst.) ; Zanderighi, G. (Munich, Max Planck Inst.)
Publication	SISSA, 2019-07-09
Imprint	2019-07-02
Number of pages	154
Note	154 pages, 125 figures. Workshop Proceedings, ECT*, Trento, 11--15 February 2019
In:	PoS ALPHAS2019 (2019) pp.001
In:	Workshop on precision measurements of the QCD coupling constant (alphas-2019), Trento, Italy, 11 - 15 Feb 2019, pp.001
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	This document collects a written summary of all contributions presented at the workshop "$\alpha_s$(2019): Precision measurements of the strong coupling" held at ECT* (Trento) in Feb. 11--15, 2019. The workshop explored in depth the latest developments on the determination of the QCD coupling $\alpha_s$ from the key categories where high precision measurements are available: (i) lattice QCD, (ii) hadronic $\tau$ decays, (iii) deep-inelastic scattering and parton distribution functions, (iv) event shapes, jet cross sections, and other hadronic final-states in $e^+e^-$ collisions, (v) Z boson and W boson hadronic decays, and (vi) hadronic final states in p-p collisions. The status of the current theoretical and experimental uncertainties associated to each extraction method, and future perspectives were thoroughly reviewed. Novel $\alpha_s$ determination approaches were discussed, as well as the combination method used to obtain a world-average value of the QCD coupling at the Z mass pole.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0)

Corresponding record in: Inspire