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LHC TOP WG meeting

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40/S2-D01 - Salle Dirac (CERN)

40/S2-D01 - Salle Dirac

CERN

We will use 2 different rooms for this meeting: - Wednesday (27/05) and Thursday (28/05): Salle Dirac (B40-S2-D01) - Friday (29/05): Salle Dirac 40/S2-D01
95
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Emanuele Re (Universita & INFN, Milano-Bicocca (IT)), Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Universitร  di Bologna), Jose Enrique Palencia Cortezon (Universidad de Oviedo (ES)), Marcel Vos (IFIC Valencia (ES))
Description

The periodic open meeting of the LHC TOP Working Group takes place twice a year. The May edition will be an in-person meeting at CERN. A ZOOM connection will be provided to (registered) people following the meeting remotely.ย ย 

The meeting provides a forum for discussion between experimentalists and theorists on the latest developments in top quark physics. Everybody is welcome to attend; please register using the link below.ย 

ย 

Recordings of the sessions will beย available below once the meeting is over.

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LHCtopWG May 2026
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  • Wednesday 27 May
    • Wednesday afternoon: I 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 1
        Introduction
        Speakers: Emanuele Re (Universita & INFN, Milano-Bicocca (IT)), Jose Enrique Palencia Cortezon (Universidad de Oviedo (ES)), Marcel Vos (IFIC Valencia (ES))
        introduction_lhctopwg_meeting.pdf
      • 2
        Measurement of the top-quark production cross-section and charge asymmetry at LHCb

        arxiv:2512.11324

        Speaker: Menglin Xu (CERN)
        Top_LHC_EW.pdf
      • 3
        A Determination of the Top Mass โ€จfrom a Global PDF Analysis

        arxiv:2603.28865

        Speaker: Jaco ter Hoeve (The University of Edinburgh)
        JtH-LHC-TOP-WG.pdf
      • 4
        Impact of differential cross section of top-quark pair production on PDF analysis and fit of the top-quark mass
        Speakers: Maria Vittoria Garzelli (Hamburg University (DE)), Oleksandr Zenaiev
        semtopwg26.pdf
    • 15:45
      coffee break
    • Wednesday afternoon: II 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 5
        Measurement of the element of the Vcb CKM matrix in decays with the ATLAS detector

        arxiv:2603.16414

        Speaker: Bowen Zhang (University of Warwick (GB))
        Vcb_LHCTopWGMeeting.pdf
      • 6
        Summary of the quantum observables workshop at CERN
        Speaker: Sokratis Trifinopoulos (University of Zurich (CH))
        QOCP26 Summary Top WG.pdf
      • 7
        Prospects for quantum decoherence measurements at colliders
        Speakers: Rafael Aoude, Rafael Aoude
        Aoude_CERN_TopWG_2026.pdf
  • Thursday 28 May
    • Thursday morning: I 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 8
        The inseparable three and four tops
        Speaker: Gauthier Durieux (CP3 - UCLouvain)
        durieux-2026-05-29-lhc-top-wg.pdf
      • 9
        Four-top-quark production in final states with hadronically decaying tau leptons and search for vector-like leptons at sqrt{s} = 13 TeV

        CMS-PAS-TOP-24-017

        Speaker: Huiling Hua (Chinese Academy of Sciences (CN))
        LHCtopWG_HuilingHua_v1.pdf
      • 10
        Complementarity of di-top and four-top searches in interpreting possible signals of new physics

        https://arxiv.org/abs/2602.15027

        Speaker: Romal Kumar
        20260528_lhcwg_fourtop.pdf
    • 10:30
      Coffee break
    • Thursday morning: II 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 11
        Updated NLO+NNLL Predictions for ttZ Production

        arxiv:2001.03031

        Speaker: Roger Balsach Garcia Cascon
        TOPWG_Balsach.pdf
      • 12
        NNLO QCD corrections to top-quark pair production in association with a jet

        arxiv:2511.11431

        Speaker: Simone Zoia (University of Zurich)
        zoia_LHCtopWG_2026.pdf
      • 13
        FCCee top physics studies
        Speaker: Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))
        FCC-ee top studies 2026.05.28.pdf
    • 12:30
      Lunch break
    • Thusrday afternoon: I 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 14
        Toponium dynamics and threshold effects in Monte Carlo event generators
        Speaker: Benjamin Fuks
        Toponium_CERN.pdf
      • 15
        Cross-section enhancement near the top-anti-top production threshold with the ATLAS detector

        arxiv:2601.11780, arxiv:2605.02341

        Speaker: Yoav Afik (University of Chicago (US))
        Toponium_LHCtopWG___28_05_2026.pdf
      • 16
        Observation of a pseudoscalar excess at the top quark pair production threshold in the single lepton channel

        CMS-PAS-TOP-25-002

        Speaker: Yu-Heng Yu (University of Rochester (US))
        TOP25002_LHCtop.pdf
    • 15:30
      Coffee break
    • Thusrday afternoon: II 40/S2-C01 - Salle Marie Sklodowska-Curie

      40/S2-C01 - Salle Marie Sklodowska-Curie

      CERN

      115
      Show room on map
      • 17
        Update on toponium simulations with Pythia

        arxiv:2605.19546

        Speaker: Torbjorn Sjostrand (Lund University (SE))
        topPairRevisit.pdf
      • 18
        Threshold Top-Quark Pair-Production: Cross Sections and Key Uncertainties

        arxiv:2604.09485

        Speaker: Giovanni Limatola
        limatola_top.pdf
      • 19
        Modelling ttbar at threshold: updates

        arxiv:2505.00096 + ongoing work

        Speaker: Emanuele Re (Universita & INFN, Milano-Bicocca (IT))
        2026_05_28_CERN_toponium_upload.pdf
      • 20
        Dinner at Cafe de la Place (Meyrin)
  • Friday 29 May
    • Friday morning: I 40/S2-D01 - Salle Dirac

      40/S2-D01 - Salle Dirac

      CERN

      We will use 2 different rooms for this meeting: - Wednesday (27/05) and Thursday (28/05): Salle Dirac (B40-S2-D01) - Friday (29/05): Salle Dirac 40/S2-D01
      95
      Show room on map
      • 21
        Theory predictions for ttW production at the LHC: status and prospects

        arxiv:2306.16311 + ongoing work

        Speaker: Massimiliano Grazzini (University of Zurich (CH))
        Grazzini_Top2026.pdf
      • 22
        s- and t-channel single-top production in POWHEG-BOX-RES
        Speaker: Tommaso Saracco (Nikhef)
        singletop_saracco.pdf
      • 23
        Measurement of differential -channel single top (anti)quark production cross-sections at 13 TeV with the ATLAS detector

        arxiv:2601.04938

        Speaker: Lukas Kretschmann (Bergische Universitaet Wuppertal (DE))
        LHCTopWG2026_LukasKretschmann.pdf
    • 10:45
      Coffee break
    • Friday morning: II 40/S2-D01 - Salle Dirac

      40/S2-D01 - Salle Dirac

      CERN

      We will use 2 different rooms for this meeting: - Wednesday (27/05) and Thursday (28/05): Salle Dirac (B40-S2-D01) - Friday (29/05): Salle Dirac 40/S2-D01
      95
      Show room on map
      • 24
        Measurement of the top-quark mass using decays with a meson at 13 TeV with the ATLAS detector

        JHEP 04 (2026) 099

        Speaker: Frederic Derue (LPNHE-Paris CNRS/IN2P3)
        ATLASmtopJpsi_LHCTopWGMeeting_29052026.pdf
      • 25
        Measurement of single top quark and ttbar production cross sections in association with a photon in proton-proton collisions at sqrt{s} = 13 TeV

        CMS-PAS-TOP-25-003

        Speaker: Ying An (Deutsches Elektronen-Synchrotron (DE))
        LHCtopWG_tgamma_TOP_25_003_27May2026_final.pdf
      • 26
        Calibration of the jet energy scale and resolution of small-radius jets using semileptonic events with the ATLAS detector

        arxiv:2512.17482

        Speaker: Adriana Dohnalova (Comenius University (SK))
        LHCtopWGmeeting_JESfromWmass.pdf