alphas-2022: Workshop on precision measurements of the QCD coupling constant

Name: alphas-2022: Workshop on precision measurements of the QCD coupling constant
Start: 2022-01-31T08:00:00+01:00
End: 2022-02-04T21:55:00+01:00
Location: ECT* Trento

31 Jan 2022, 08:00 → 4 Feb 2022, 21:55 Europe/Zurich

ECT* Trento

Strada delle Tabarelle, 286 38123 Villazzano TRENTO (TN)

David d'Enterria (CERN), Giulia Zanderighi (Max Planck Society (DE)), Stefan Kluth (Max Planck Society (DE))

Description

The "alphas-2022: Workshop on precision measurements of the strong coupling constant" conference, will be held at ECT*-Trento in the first week of February 2022, aims at exploring in depth the current status and upcoming prospects in the determination of the QCD coupling constant $\alpha_S(m_Z)$ from the key observables where high-precision experimental measurements and theoretical calculations are (or will be) available: (i) lattice QCD, (ii) hadronic decays of tau leptons, (iii) deep-inelastic electron-proton scattering and global parton densities analyses, (iv) QCD corrections to electroweak precision observables, and analysis of (v) hadronic final states in high energy particle collisions ($e^+e^-$, ep, and pp). This workshop is a follow-up of similar alpha_s meetings that took place in 2011 (MPI, Munich), 2015 (CERN), and 2019 (ECT*-Trento).

The main outcome of the meeting will be an "alpha_S Snowmass White Paper (2022)" writeup to be publicly submitted in 15th March 2022. All contributors will be therefore asked to provide a 1-2 pages summary of their work at the end of the workshop.

Participants

Abhinav Choudhury
Alberto Ramos Martinez
Alessandro Guida
Alexander Nesterenko
Alexandre Deur
Alexei Bazavov
Ali Mohammadi Ruzbahani
Aliaksei Hrynevich
Amanda Sarkar
Anatoly Kotikov
Andre Hoang
Andreas Kronfeld
Andrii Verbytskyi
Antonio Pich
Barbara Mele
Ben Nachman
Bharadwaj Harikrishnan
Bogdan MALAESCU
Claire Gwenlan
Cristian Baldenegro Barrera
Daniel Britzger
Daniel Savoiu
David d'Enterria
Diogo Boito
Emily Ann Smith
Federico Vazzoler
Francesco Giuli
German Sborlini
Giulia Zanderighi
Gorazd Cvetic
Hamzeh Khanpour
Jad Sardain
Javier Llorente Merino
Jennifer Kathryn Roloff
Joey Huston
Johannes Bluemlein
Johannes Heinrich Weber
José Luis Carrasco Huillca
Juan Rojo
Katerina Lipka
Keping Xie
Kim Maltman
Klaus Rabbertz
Leticia Cunqueiro Mendez
Luc Poggioli
Lucian Harland-Lang
Luigi Del Debbio
Maarten Golterman
Marcel Vos
Markus Wobisch
Matt LeBlanc
Matthias Schott
Mattia Dalla Brida
Miguel Angel Benitez-Rathgeb
Mikhail Barabanov
Noah Bray-Ali
Nora Brambilla
Oldrich Kepka
Paolo Nason
Patricia Rebello Teles
Pavel Nadolsky
Pavel Starovoitov
Peter Petreczky
Pier Monni
Ranjit Nayak
Redamy Perez Ramos
Richard Ball
Roger Horsley
Roy Lemmon
santi peris
Shivam Raj
Siegfried Bethke
Simone Amoroso
Simone Marzani
Stanley Brodsky
Stefan Kluth
Stefan Sint
Stefano Camarda
Sven-Olaf Moch
Thomas Cridge
Tobias Neumann
Toni Makela
Valentina Guglielmi
Valerio Bertone
Vicent Mateu
Vitalii Okorokov
Zafer Acar
Zahra Farazpay
Zdenek Hubacek

Support

alphas-2022@cern.ch

Monday, 31 January
- 10:30
  
  Coffee break
- 12:00
  
  Lunch
- 13:45
  
  ECT* welcome (Dir. Gert Aarts)
- Introduction and organisation
  
  Aim of the workshop, organise Snowmass contribution
  - 1
    
    Presentation / Goals of the workshop / Snowmass White Paper
    
    Speakers: David d'Enterria (CERN), Giulia Zanderighi (Max Planck Society (DE)), Stefan Kluth (Max Planck Society (DE))
    
    alphas22_ect_intro.pdf
- alpha_s: Lattice QCD
  - 2
    
    Update on alpha_s from FLAG
    
    Speaker: Stefan Sint (Trinity College Dublin)
    
    trento22a.pdf
  - 3
    
    α_s from lattice QCD: an overview
    
    Speakers: Andreas Kronfeld, Stefan Sint (Trinity College Dublin)
  - 4
    
    Strong coupling constant from moments of quarkonium correlators revisited
    
    Speaker: Johannes Heinrich Weber (Humboldt University of Berlin)
    
    ectstar-moments-weber.pdf
  - 5
    
    alphas from the static energy and force
    
    alphas from the static energy
    
    Speaker: Nora Brambilla
    
    alphas022.pdf
  - 6
    
    Strong coupling constant determination in 3 flavor QCD from the static energy and free energy
    
    Speaker: Johannes Heinrich Weber (Humboldt University of Berlin)
    
    ectstar-static-weber.pdf
- 16:15
  
  Coffee break
- alpha_s: Lattice QCD
  - 7
    
    Heavy-quark decoupling: a new tool for precision determinations of alpha_s using lattice QCD
    
    Speaker: Mattia Dallabrida (CERN)
    
    alpha2022.pdf
  - 8
    
    A precise determination of alpha_s from lattice QCD using decoupling of heavy quarks
    
    A precise determination of alpha_s from lattice QCD using decoupling of heavy quarks
    
    Speaker: Alberto Ramos Martinez (Univ. of Valencia and CSIC (ES))
    
    alphas22.pdf
  - 9
    
    Discussion: alpha_s from lattice QCD
Tuesday, 1 February
- Individual preparation of White Paper contributions (Asia/EU participants)
- 10:30
  
  Coffee break
- Individual preparation of White Paper contributions (Asia/EU participants)
- 12:00
  
  Lunch break
- alpha_s from DIS & PDFs
  - 10
    
    alpha_s in PDF fits
    
    Speaker: Sven-Olaf Moch
    
    trento-alphas-2022.pdf
  - 11
    
    Scheme invariant evolution of non-singlet DIS structure functions at N3LO
    
    Speaker: Johannes Bluemlein (DESY)
    
    talkECT.pdf
  - 12
    
    The determination of the strong coupling in the MSHT fit
    
    Speakers: Thomas Cridge, Thomas Cridge (University College London)
    
    TCridge_MSHT20alphas_talk_Jan21.pdf
  - 13
    
    Strong coupling determination from the NNPDF4.0 global analysis
    
    Speaker: Juan Rojo (VU Amsterdam and Nikhef)
    
    rojo-NNPDF40-alphas.pdf
  - 14
    
    The alpha_s determination in the CT18 analysis
    
    Speaker: Pavel Nadolsky (Southern Methodist University)
    
    m201.nadolsky.pdf
- 15:30
  
  Coffee break
- alpha_s from DIS & PDFs
  - 15
    
    Impact of jet production data on the next-to-next-to-leading order determination of HERAPDF2.0 parton distributions
    
    Impact of jet production data on the next-to-next-to-leading order determination of HERAPDF2.0 parton distributions
    
    Speaker: Amanda Sarkar (University of Oxford (GB))
    
    herajets_2022.pdf
  - 16
    
    αs from DIS via a large-x resummation
    
    Speaker: Anatoly Kotikov (JINR)
    
    SIWco.pdf
- alpha_s at hadron colliders
  - 17
    
    New results on strong coupling constant and PDFs from CMS
    
    Speaker: Toni Makela (Deutsches Elektronen-Synchrotron (DE))
    
    New_results_on_strong_coupling_constant_and_PDFs_from_CMS.pdf
  - 18
    
    alpha_s from inclusive W and Z cross sections at the LHC
    
    Speaker: David d'Enterria (CERN)
    
    dde_alphas_sigmaWZ_Trento_feb22.pdf
  - 19
    
    The ATLASpdf21 fit
    
    Speaker: Francesco Giuli (Brandeis University (US))
    
    FGiuli_ATLASpdf21_aS_010222.pdf
  - 20
    
    Discussion: alpha_s from PDFs & LHC data
Wednesday, 2 February
- Individual preparation of White Paper contributions (Asia/EU participants)
- 10:30
  
  Coffee break
- Individual preparation of White Paper contributions (Asia/EU participants)
- 12:00
  
  Lunch
- alpha_s from e+e- hadronic final states
  - 21
    
    C-parameter hadronisation in the symmetric 3-jet limit and impact on alpha_S fits
    
    Speaker: Pier Francesco Monni (CERN)
    
    Trento_2022.pdf
  - 22
    
    Linear power correctrions to shape variables in e+e- annihilation
    
    Speaker: Paolo Nason (Max Planck Society (DE))
    
    Renormalons.pdf
  - 23
    
    Determination of alpha_{S} beyond NNLO from the e^+e^- data
    
    Speaker: Andrii Verbytskyi (Max Planck Society (DE))
    
    Trento2022_MOMMC.pdf
  - 24
    
    alpha_s from groomed event shapes
    
    Speaker: Simone Marzani
    
    marzani-alphas-2022.pdf
  - 25
    
    Hadronic vacuum polarization function, R-ratio, and the strong coupling
    
    Speaker: Alexander Nesterenko (JINR)
    
    nesterenko.pdf
- 15:30
  
  Coffee break
- alpha_s from e+e- hadronic final states
  - 26
    
    alpha_s from hadronic W and Z decays
    
    Speaker: David d'Enterria (CERN)
    
    dde_ee_ZW_N3LO_alphas_ECT_feb22.pdf
  - 27
    
    Strong coupling determination at NNLO*+NNLL accuracy from the energy evolution of jet fragmentation functions at low z
    
    Strong coupling determination at NNLO*+NNLL accuracy from the energy evolution of jet fragmentation functions at low z
    
    Speaker: Redamy PEREZ Ramos (IPSA, Ivry-sur-Seine)
    
    QCD_talk_Trentino_2022.pdf
- Other alpha_s extractions
  - 28
    
    Strong coupling from Charmonium Sum Rules
    
    Speakers: VICENT MATEU BARREDA (University of Salamanca), Vicent Mateu (MPI for Physics, Munich)
    
    article-1
    
    article-2
    
    Mateu-alphaSR.pdf
  - 29
    
    Measurements of alpha_s from spin structure functions
    
    Speaker: Alexandre Deur (JLAB)
    
    BjSR_alpha_EIC.pdf
  - 30
    
    The bottom quark mass from Higgs boson measurements
    
    Speaker: Marcel Vos (IFIC Valencia (ES))
    
    bottom_quark_and_higgs_boson.pdf
- alpha_s from e+e- hadronic final states: Discussion: alpha_s from e+e-
Thursday, 3 February
- Individual preparation of White Paper contributions (Asia/EU participants)
- 10:30
  
  Coffee break
- Individual preparation of White Paper contributions (Asia/EU participants)
- 12:00
  
  Lunch
- alpha_s at hadron colliders
  - 31
    
    alpha_s from jet production at HERA and the LHC
    
    Speakers: Daniel Britzger (Deutsches Elektronen-Synchrotron (DE)), Daniel Britzger (Max-Planck-Institut für Physik München)
    
    220203-britzger-alpha_s.pdf
  - 32
    
    A novel method for computing cross section ratios in pQCD (for alpha_s deteminations)
    
    Speaker: Markus Wobisch (Louisiana Tech University (US))
    
    20220203-alphas-novel.pdf
  - 33
    
    Energy range for the RGE test and PDF sensitivity in alpha_S evaluations from jet cross section ratios at the LHC
    
    Speaker: Bogdan Malaescu (Centre National de la Recherche Scientifique (FR))
    
    XsecRatios_RGEtests_PDFsensitivity_Malaescu.pdf
  - 34
    
    alpha_S from the Z-boson transverse momentum distribution
    
    Speaker: Stefano Camarda (CERN)
    
    zptalphas.pdf
- alpha_s from tau decays
  - 35
    
    Determination of the strong coupling from tau decays: current status
    
    Speaker: Antonio Pich (IFIC, U. Valencia -.)
    
    Trento2022_pich.pdf
- 15:30
  
  Coffee break
- alpha_s from tau decays
  - 36
    
    Extraction of alpha_s data using Borel-Laplace sum rules for tau decay data
    
    Speaker: Gorazd Cvetic
    
    Trento2022GCvetic.pdf
  - 37
    
    The strong coupling from an improved tau vector isovector spectral function
    
    Speaker: Santi Peris
    
    Paper1.pdf
    
    Paper2.pdf
    
    Peris _Trento 2022.pdf
  - 38
    
    alpha_s from e+e- to hadrons around the tau-mass scale
    
    Speaker: Diogo Boito
    
    Boito_Trento.pdf
    
    Paper
  - 39
    
    On the use of the operator product expansion in finite-energy sum rules for light-quark correlators
    
    Speaker: Maarten Golterman
    
    Trento2022_Golterman.pdf
  - 40
    
    Reconciling FOPT and CIPT alpha_s determinations from hadronic tau spectral function moments
    
    Speaker: Andre Hoang
    
    Hoang-Tau-CIPT-FOPT.pdf
  - 41
    
    Discussion: alpha_s from tau decays
Friday, 4 February
- Individual preparation of White Paper contributions (Asia/EU participants)
- 10:30
  
  Coffee break
- Individual preparation of White Paper contributions (Asia/EU participants)
- 12:00
  
  Lunch
- 42
  
  Discussion on PDG averaging
  
  Speakers: Giulia Zanderighi (Max Planck Society (DE)), Joey Huston (Michigan State University (US)), Klaus Rabbertz (KIT - Karlsruhe Institute of Technology (DE))
  
  huston_alphas_discussion_trento_2022.pdf
- 43
  
  Discussion and preparation of Snowmass White Paper (2022).
  
  Speakers: David d'Enterria (CERN), Giulia Zanderighi (Max Planck Society (DE)), Stefan Kluth (Max Planck Society (DE))
  
  alphas22_ect_closure.pdf