Workshop on high-precision alpha_s measurements: from LHC to FCC-ee

4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room


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David d'Enterria (CERN), Peter Skands (Monash University (AU))

The workshop is part of the FCC-ee "QCD & gamma-gamma physics" working group activities (aiming at a Yellow Report in 2016), and aims at addressing the following issues:

  • What is the current state-of-the-art of all alpha_s determination methods from the theoretical & experimental point of view ?
  • What is the current size of the theoretical uncertainties: missing higher orders, electroweak corrections, power corrections, hadronization corrections,... ?
  • What is the expected alpha_s uncertainty in ~10 years from now: theoretical developments, plus O(1 ab-1) p-p at 14 TeV at the LHC ?
  • What are the expected improvements brought about by the FCC-ee: 1012 Z's at sqrt(s)=mZ; 108 W's at sqrt(s)=mWW; similar orders-of-magnitude for tau, jets,...? What are the systematic errors that the FCC-ee detectors should target in order to match the expected statistical precision, or where that is not possible, what are the important theoretical targets that should be met or exceeded?
  • Ahmed Ali
  • Alain Blondel
  • Alexander Dimitrov Mitov
  • Andre Hoang
  • Andrea Banfi
  • Andrew Larkoski
  • Andriniaina Narindra Rasoanaivo
  • Antonio Pich
  • Ben Meiring
  • Bernd Kniehl
  • Bogdan Malaescu
  • Carlos Gracios
  • David d'Enterria
  • Francesco Sannino
  • Gavin Salam
  • Gionata Luisoni
  • Isobel Kolbe
  • Javier Llorente Merino
  • Jean-Loic Kneur
  • Joan Soto
  • Joao Pires
  • Johann Kuehn
  • Johannes Bluemlein
  • Klaus Hamacher
  • Klaus Monig
  • Klaus Rabbertz
  • Luminita Mihaila
  • Markus Klute
  • Martin Gonzalez-Alonso
  • Matej Srebre
  • Michael Klasen
  • Patricia Rebello Teles
  • Patrick Janot
  • Paul Mackenzie
  • Peter Skands
  • Razieh Morad
  • Redamy Perez Ramos
  • Roger Hernandez-Pinto
  • Siegfried Bethke
  • Simone Amoroso
  • Stefan Kluth
  • Sven Menke
  • Xavier Garcia Tormo
  • Monday, October 12
    • 2:00 PM 2:10 PM
      Presentation / Goals of the workshop 10m
      Speakers: David d'Enterria (CERN), Peter Skands (Monash University (AU))
    • 2:10 PM 2:45 PM
      World Summary of alpha_s (2015) 35m
      Speaker: Siegfried Bethke (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
    • 2:45 PM 3:15 PM
      alpha_s and physics beyond the Standard Model 30m
      Speaker: francesco Sannino (CP3-Origins)
    • 3:15 PM 3:40 PM
      Impact of alpha_s on Higgs prod. & decay uncertainties 25m
      Speaker: Luminita Mihaila
    • 3:40 PM 4:00 PM
      Coffee break 20m
    • 4:00 PM 7:00 PM
      alpha_s at low scales
      • 4:00 PM
        alpha_s from lattice QCD 25m
        Speaker: paul mackenzie (Fermilab)
      • 4:25 PM
        Determination of αs from the QCD static energy 20m
        Speaker: Xavier Garcia Tormo
      • 4:45 PM
        alpha_s from pion decay factor 25m
        Speaker: Jean-Loic Kneur (Univ. Montpellier 2)
      • 5:10 PM
        alpha_s from hadronic tau decays 25m
        Speakers: Antonio Pich (University of Valencia), Antonio Pich (Unknown)
      • 5:35 PM
        alpha_s from hadronic quarkonia decays 25m
        Speaker: Soto i Riera Joan (UB)
      • 6:00 PM
        alpha_s from soft parton-to-hadron FFs 20m
        Speakers: David d'Enterria (CERN), Redamy Perez-Ramos
  • Tuesday, October 13
    • 9:00 AM 1:30 PM
      alpha_s at high scales
      • 9:30 AM
        alpha_s from DIS (PDFs) : 25m
        Speaker: Johannes Bluemlein (DESY)
      • 9:55 AM
        alpha_s from DIS (jets, photoproduction) 25m
        Speaker: Michael Klasen
      • 10:20 AM
        alpha_s from scaling violations of hard parton-to-hadron FFs 25m
        Speaker: Prof. Bernd Kniehl (II. Institut für Theoretische Physik Universität Hamburg)
      • 10:45 AM
        alpha_s from e+e- event shapes 25m
        Speaker: Stefan Kluth (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
      • 11:10 AM
        Coffee break 15m
      • 11:25 AM
        alpha_s from e+e- C-parameter event shape 25m
        Speaker: Andre Hoang (U)
      • 11:50 AM
        alpha_s from e+e- jet cross sections 25m
        Speaker: Andrea Banfi (University of Sussex)
      • 12:15 PM
        alpha_s from hadronic Z decays and from the full electroweak fit 25m
        Speaker: Klaus Monig (Deutsches Elektronen-Synchrotron (DE))
      • 12:40 PM
        alpha_s from sigma(e+e--->hadrons) 25m
        Speaker: Johann Kuehn (KIT, Karlsruhe, Germany)
      • 1:05 PM
        alpha_s from hadronic W decays 25m
        Speakers: David d'Enterria (CERN), Matej Srebre (CERN)
    • 1:30 PM 3:15 PM
      Lunch break 1h 45m
    • 3:15 PM 5:35 PM
      alpha_s at hadron colliders
      • 3:15 PM
        alpha_s from sigma(ttbar) at the LHC 25m
        Speaker: Alexander Dimitrov Mitov (University of Cambridge (GB))
      • 3:40 PM
        alpha_s from sigma(ttbar): latest developments 20m
        Speaker: Gavin Salam (CERN)
      • 4:00 PM
        Future prospects of alpha_s from jets at the LHC at NNLO 25m
        Speaker: Joao Pires (Milano Bicocca)
      • 4:25 PM
        Coffee break 20m
      • 4:45 PM
        alpha_s determinations from ATLAS (status & plans) 25m
        Speaker: Bogdan Malaescu (Centre National de la Recherche Scientifique (FR))
      • 5:10 PM
        alpha_s determinations from CMS (status & plans) 25m
        Speaker: Klaus Rabbertz (KIT - Karlsruhe Institute of Technology (DE))
    • 5:35 PM 6:15 PM
      Conclusions (FCC-ee Yellow Report preparation) 40m