Parton Radiation and Fragmentation from LHC to FCC-ee

Europe/Zurich
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber

CERN

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

Aims and Scope

This workshop aims to gather theorists and experimentalists working in the fields of QCD jets, jet (sub)structure, and parton-to-hadron fragmentation.

The current state of the art and open questions will be surveyed, and put in the context of the potential for decisive new measurements offered by the extremely high statistics and clean environment of future e+e- colliders. 

The workshop forms part of the FCC-ee WG5: QCD & gamma-gamma physics, and follows on from a Workshop on precision alphaS determinations held in late 2015. The combined output from these two workshops will be used to inform a Yellow Report scheduled for 2017. To facilitate this, contributors will be asked to provide brief summaries in a proceedings-style writeup.

The table below, from arXiv:1602.05043, summarises key expected luminosities, running times, and event numbers, at the various FCC-ee CM energies:

Expected Luminosities and Event Numbers at FCC-ee

Topics for discussion at this workshop include:

  • How are the current limitations in precision e+e- constraints affecting theoretical studies, such as:

    • Fragmentation-function determinations

    • Validations of jet substructure techniques

    • Quark-gluon jet discrimination methods

    • Hadronisation corrections.  

  • Interplay with hadron colliders from LHC to FCC-hh. Precision modelling of LHC fragmentation corrections currently benefits vitally from the legacy of e+e- colliders. What is the set of FCC-ee measurements that will be most crucial to inform the next-generation fragmentation models for the FCC-hh, especially in light of new questions raised by LHC? 

  • What decisive new measurements become possible with the huge jet statistics accessible at an FCC-ee with 1012 Z's at sqrt(s)=mZ; 108 W's at sqrt(s)=mWW; and 106 Higgs bosons at sqrt(s)=240 GeV

  • 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?

  • What fiducial coverage, resolutions, and detector capabilities (such as particle ID) will be required to fully exploit the potential for QCD measurements? 

  • Interplay with the rest of the FCC-ee precision program. What are the most crucial QCD measurements / uncertainties / constraints ? What improvements will be most crucial to reach the desired accuracies?

  • What is the current size of the theoretical uncertainties: missing higher orders, electroweak corrections, power corrections, hadronization corrections,... ?

  • What is the expected .... uncertainty in ~10 years from now: theoretical developments, plus O(1 ab-1) p-p at 14 TeV at the LHC ?

Organisers:

Peter Skands (chair), David d'Enterria

Participants
  • Adil Jueid
  • Aimane Ait Ahmed
  • Alain Blondel
  • Andrew Lifson
  • Anselm Vossen
  • Ben Nachman
  • Bryan Webber
  • Christian Bierlich
  • Daniele Paolo Anderle
  • David d'Enterria
  • Deepak Kar
  • Diego Liberati
  • Elizabeth Locci
  • Emilia Leogrande
  • Fabio Anulli
  • Fulvio Piccinini
  • Gennaro Corcella
  • Georgios Gerasimos Voutsinas
  • Gionata Luisoni
  • Giorgia Rauco
  • Gregory Soyez
  • Haitao Li
  • Helen Brooks
  • Hrayr Matevosyan
  • Ilkka Helenius
  • Jim Talbert
  • Juan J. Lopez-Villarejo
  • Juan Rojo
  • Jun Gao
  • Klaus Hamacher
  • Leif Lönnblad
  • Leszek Zawiejski
  • Marcel Vos
  • Markus Klute
  • Markus Seidel
  • Michele Selvaggi
  • Mogens Dam
  • Mrinal Dasgupta
  • Nadine Fischer
  • Niloufar Alipour Tehrani
  • Nobuo Sato
  • Oliver Fischer
  • Paolo Gunnellini
  • Patricia Rebello Teles
  • Patrick Janot
  • Peter Richardson
  • Peter Skands
  • Pier Monni
  • Rahmat Rahmat
  • Sarka Todorova
  • Simon Plätzer
  • Simone Amoroso
  • Sissel Bay Nielsen
  • stanislaw jadach
  • Stano Tokar
  • Stefan Kluth
  • Stefan Richter
  • Stefano Carrazza
  • Sven-Olaf Moch
  • Tadeusz Andrzej Lesiak
  • Torbjörn Sjöstrand
  • Valerio Bertone
  • Vicent Mateu
  • Vitaly Okorokov
  • Wesley Metzger
  • Wieslaw Placzek
  • Yasuhito Sakaki
  • Monday, November 21
    • 8:55 AM 9:00 AM
      NOTE MONDAY SESSIONS TAKE PLACE IN FILTRATION PLANT (BLDG 222) 5m 503/1-001 - Council Chamber

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    • 9:00 AM 9:10 AM
      Welcome 10m 503/1-001 - Council Chamber

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      Speakers: David d'Enterria (CERN) , Peter Skands (Monash University (AU))
    • 9:10 AM 9:45 AM
      Parton Fragmentation Functions 35m 503/1-001 - Council Chamber

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      Speakers: Anselm Vossen, Anselm Vossen
    • 9:45 AM 10:10 AM
      Splitting Functions at NNLO 25m 503/1-001 - Council Chamber

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      Speaker: S. Moch (UHH)
    • 10:10 AM 10:35 AM
      Neural Network Fragmentation Functions 25m 503/1-001 - Council Chamber

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      Speakers: Valerio Bertone (NIKHEF) , Valerio Bertone
    • 10:35 AM 11:00 AM
      Break 25m 503/1-001 - Council Chamber

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    • 11:00 AM 11:35 AM
      Parton Showers since LEP 35m 503/1-001 - Council Chamber

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      Speakers: Peter Richardson, Peter Richardson (CERN & IPPP, Durham University)
    • 11:35 AM 12:00 PM
      Jet Substructure and Small-Radius Jets 25m 503/1-001 - Council Chamber

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      Speakers: Mrinal Dasgupta (Unknown) , Mrinal Dasgupta (University of Manchester (GB))
    • 12:00 PM 12:25 PM
      Quark vs Gluon Jets 25m 503/1-001 - Council Chamber

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      Speakers: Gregory Soyez (CEA Saclay) , Gregory Soyez (IPhT, CEA Saclay)
    • 12:25 PM 12:50 PM
      Gluon vs. quark fragmentation from LEP to FCC-ee 25m 503/1-001 - Council Chamber

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      Speakers: Klaus Hamacher (Bergische Uni Wuppertal) , Klaus Hamacher (Fachbereich C / Physik-Bergische Universitaet Wuppertal)
    • 1:10 PM 2:15 PM
      Lunch 1h 5m
    • 2:15 PM 2:20 PM
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    • 2:20 PM 2:45 PM
      Distinguishing quark and gluon jets at the LHC 25m 503/1-001 - Council Chamber

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      Speaker: Giorgia Rauco (Universitaet Zuerich (CH))
    • 2:45 PM 3:10 PM
      Jet charge determination at the LHC 25m 503/1-001 - Council Chamber

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      Speaker: Stano Tokar (Comenius University (SK))
    • 3:10 PM 3:35 PM
      Application of quark-gluon jet discrimination and its uncertainty 25m 503/1-001 - Council Chamber

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      Speaker: Yasuhito Sakaki (KEK)
    • 3:35 PM 4:00 PM
      Break 25m 503/1-001 - Council Chamber

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    • 4:00 PM 4:35 PM
      Colour Reconnections from LEP to Future Colliders 35m 503/1-001 - Council Chamber

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      Speakers: Torbjorn Sjostrand, Torbjorn Sjostrand (Lund University (SE))
    • 4:35 PM 5:00 PM
      Colour Reconnections in PP Collisions 25m 503/1-001 - Council Chamber

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      Speaker: Christian Bierlich (Lund University (SE))
    • 5:00 PM 5:25 PM
      Baryon Production and Correlations from LEP to FCC-ee 25m 503/1-001 - Council Chamber

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      Speaker: Stefan Kluth (Max-Planck-Institut fur Physik (DE))
    • 5:25 PM 6:00 PM
      Bose-Einstein and Fermi-Dirac Correlations 35m 503/1-001 - Council Chamber

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      Speaker: Wesley Metzger (Nikhef National institute for subatomic physics (NL))
    • 6:00 PM 7:00 PM
      Informal Discussions in R1 1h R1

      R1

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  • Tuesday, November 22
    • 8:55 AM 9:00 AM
      NOTE TUESDAY MORNING SESSION TAKES PLACE IN FILTRATION PLANT (BLDG 222) 5m 503/1-001 - Council Chamber

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    • 9:00 AM 9:25 AM
      Challenges in heavy-quark fragmentation 25m 503/1-001 - Council Chamber

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      Speakers: Gennaro Corcella (Unknown) , Gennaro Corcella (INFN - LNF)
    • 9:25 AM 9:50 AM
      Heavy Quark Fragmentation and the Dead Cone 25m 503/1-001 - Council Chamber

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      Speaker: Michele Selvaggi (CERN)
    • 9:50 AM 10:15 AM
      g->bb Studies at LHC 25m 503/1-001 - Council Chamber

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      Speaker: Ben Nachman (SLAC National Accelerator Laboratory (US))
    • 10:15 AM 10:40 AM
      Break 25m 503/1-001 - Council Chamber

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    • 10:40 AM 11:05 AM
      Jet Broadening and Angularities from LEP to FCC-ee 25m 503/1-001 - Council Chamber

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      Speaker: Jim Talbert (University of Oxford)
    • 11:05 AM 11:30 AM
      Resummation of jet rates and event-shape distributions in e+e- 25m 503/1-001 - Council Chamber

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      Speakers: Pier Francesco Monni (ITP, UZH Zuerich) , Pier Francesco Monni (CERN)
    • 11:30 AM 11:55 AM
      C Parameter at NNNLL’ 25m 503/1-001 - Council Chamber

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      Speaker: Mr Vicent Mateu Barreda (Autonomous University of Madrid)
    • 11:55 AM 12:20 PM
      First Monte Carlo analysis of fragmentation functions from single-inclusive e+e- annihilation 25m 503/1-001 - Council Chamber

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      Speaker: nobuo sato (jlab)
    • 12:40 PM 1:45 PM
      Lunch 1h 5m
    • 1:45 PM 1:50 PM
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    • 1:50 PM 2:15 PM
      Fragmentation Functions from Belle 25m 503/1-001 - Council Chamber

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      Speaker: Anselm Vossen
    • 2:15 PM 2:40 PM
      Fragmentation Functions from BaBar 25m 503/1-001 - Council Chamber

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      Speaker: Fabio Anulli (Universita e INFN, Roma I (IT))
    • 2:40 PM 3:05 PM
      Fragmentation functions at NNLO and their small-z logarithmic corrections 25m 503/1-001 - Council Chamber

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      Speaker: Daniele Anderle (University of Manchester)
    • 3:05 PM 3:30 PM
      Fragmentation functions at low-z at NNLO*+NNLL 25m 503/1-001 - Council Chamber

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      Speaker: David d'Enterria (CERN)
    • 3:30 PM 3:50 PM
      Break 20m 503/1-001 - Council Chamber

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    • 3:50 PM 3:55 PM
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    • 3:55 PM 4:20 PM
      The Role of Quark Spin in Hadronisation 25m 503/1-001 - Council Chamber

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      Speaker: Hrayr Matevosyan (University of Adelaide)
    • 4:20 PM 4:45 PM
      The Helix String 25m 503/1-001 - Council Chamber

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      Speaker: Sarka Todorova (Centre National de la Recherche Scientifique (FR))
    • 4:45 PM 5:10 PM
      Jet reconstruction algorithms in e+e- 25m 503/1-001 - Council Chamber

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      Speaker: Marcel Vos (IFIC Valencia (ES))
    • 5:10 PM 5:35 PM
      Observables sensitive to Coherence in ee Collisions 25m 503/1-001 - Council Chamber

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      Speaker: Simon Plätzer (DESY)
    • 5:35 PM 6:00 PM
      QCD splitting-function dependence on evolution variable 25m 503/1-001 - Council Chamber

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      Speaker: Staszek Jadach (Polish Academy of Sciences (PL))
    • 6:00 PM 7:00 PM
      Informal Discussions in R1 1h R1

      R1

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