16th International Workshop on Top Quark Physics (TOP2023)


Welcome to the 16th International Workshop on Top Quark Physics (TOP2023)

The 16th International Workshop on Top Quark Physics (TOP 2023) will be held in person, from September 24 to 29, 2023, in Traverse City, Michigan, USA.

TOP 2023 brings together experimentalists and theorists to present and discuss the latest developments in top-quark physics. This year's meeting will be hosted by North American institutions on Lake Michigan.

Young scientists are especially encouraged to participate, and there will be a poster session as well as a block of short plenary talks in the "Young Scientist Forum'',  allowing them to present their work.  

See the main workshop web page for more information.

Wifi: Delamar Guest. Login: traversecity

Workshop photo

  • Aashwin Basnet
  • Abhishek Sharma
  • Alexander Grohsjean
  • Alexander Mitov
  • Andrea Helen Knue
  • Andrea Piccinelli
  • Andreas Werner Jung
  • Andrew Wildridge
  • Antonio Onofre
  • Arthur Wu
  • Beren Ozek
  • Brian Winer
  • Carmen Diez Pardos
  • Cecilia Gerber
  • Christopher Neu
  • Clara Nellist
  • Claudia Glasman
  • Claudio Severi
  • David Walter
  • Dimbiniaina Soanasolo Rafanoharana
  • Dominic Hirschbuehl
  • Dominik Babal
  • Doojin Kim
  • Dorival Goncalves Netto
  • Eddie Mcgrady
  • Emanuel Pfeffer
  • Emanuele Usai
  • Ethan Colbert
  • Gilad Perez
  • Giulia Negro
  • Grace Bowling
  • Hanna Park
  • Hannah Nelson
  • Harriet Watson
  • Harrison Prosper
  • Hieu Le
  • Huey-Wen Lin
  • Hugo Becerril
  • Ines Ruffa
  • James Howarth
  • Jan van der Linden
  • Jarrett Fein
  • Jason Gombas
  • Jian Wang
  • Jon Wilson
  • Joscha Knolle
  • Joshua Aaron Reidelsturz
  • Juan Antonio Aguilar Saavedra
  • Juhee Song
  • Kai-Feng Chen
  • Kaitlin Salyer
  • Kelci Mohrman
  • Keping Xie
  • Kevin Lannon
  • Knut Zoch
  • Kun Cheng
  • Laura Pintucci
  • Lingqiang He
  • Lucia Masetti
  • Manuel Szewc
  • Marcel Vos
  • Maria Aldaya Martin
  • Marvin Emin Geyik
  • Massimiliano Grazzini
  • Matteo Defranchis
  • Matthew Henry Klein
  • Michael James Fenton
  • Michele Lupattelli
  • Mikael Myllymäki
  • Nedaa-Alexandra Asbah
  • Niels Van den Bossche
  • Nils Faltermann
  • Oleksandr Burlayenko
  • Oliver Thielmann
  • Pavol Bartos
  • Peter Onyisi
  • Petr Baron
  • Radja Boughezal
  • Regina Demina
  • Reinhard Schwienhorst
  • Ricardo Escobar Franco
  • Roberto Tenchini
  • Roman Lysak
  • Rongqian Qian
  • Sahibjeet Singh
  • Simone Tentori
  • Sumit Banik
  • Sung Hak Lim
  • Surjeet Rajendran
  • Tae Jeong Kim
  • Thomas Schwarz
  • Timothy Hobbs
  • Ting-Hsiang Hsu
  • Tomas Dado
  • Tony Liss
  • Veronique Boisvert
  • Wade Fisher
  • Wolfgang Wagner
  • Yoav Afik
  • Yuyi Wan
  • Zon-Guo Si
    • 11:00 AM 4:00 PM
      Outreach, Tevatron reunion: Outreach at Dennos Museum Center Dennos museum center

      Dennos museum center

      Conveners: Andreas Werner Jung (Purdue University (US)), Jon Wilson (Baylor University (US)), Regina Demina (University of rochester), Reinhard Schwienhorst (Michigan State University (US))
    • 4:30 PM 7:30 PM
      Outreach, Tevatron reunion: Tevatron Top Reunion reception / Top23 welcome reception Leelanau Ballroom (Delamar hotel)

      Leelanau Ballroom

      Delamar hotel

      Conveners: Andreas Werner Jung (Purdue University (US)), Jon Wilson (Baylor University (US)), Regina Demina (University of rochester), Reinhard Schwienhorst (Michigan State University (US))
    • 9:00 AM 9:30 AM
      Registration 30m
    • 9:30 AM 9:40 AM
    • 9:40 AM 10:20 AM
      Keynote talk 40m
      Speaker: Prof. Gilad Perez (Weizmann)
    • 10:30 AM 11:00 AM
      Coffee break 30m
    • 11:00 AM 11:20 AM
      Top quark pair production, inclusive and differential, ATLAS+CMS 20m
      Speaker: David Walter (CERN)
    • 11:30 AM 11:50 AM
      ttH/ ttW in NNLO QCD (zoom) 20m

      Zoom: https://cern.zoom.us/j/67993580467?pwd=bDRZK2xHKzkwajE0OFB2ZlhXaTM0UT09

      Speaker: Massimiliano Grazzini (University of Zurich (CH))
    • 12:00 PM 12:20 PM
      ttW ATLAS+CMS 20m
      Speaker: Matthew Henry Klein (University of Michigan (US))
    • 12:30 PM 2:00 PM
      Lunch break 1h 30m

      Lunch buffet: Deconstructed Cherry Capital Salad, Vegetarian Orecchiette, Grilled Scottish Salmon or Rotisserie Chicken, Jumbo Green Asparagus, Smashed Fingerling Potatoes, French Cocolate Mousse

    • 2:00 PM 2:20 PM
      Top+X ATLAS+CMS 20m

      Everything that wasn't in single top or ttW or 4-top

      Speaker: Dominik Babal (Slovak Academy of Sciences (SK))
    • 2:30 PM 2:50 PM
      Single top quark production, inclusive and differential, ATLAS+CMS 20m
      Speakers: Laura Pintucci (Universita degli Studi di Udine (IT)), Laura Pintucci
    • 3:00 PM 3:20 PM
      Associated single top production (t+X) ATLAS + CMS 20m
      Speaker: Nils Faltermann (KIT - Karlsruhe Institute of Technology (DE))
    • 3:30 PM 4:00 PM
      Coffee break 30m
    • 4:00 PM 4:20 PM
      PDFs from future colliders for precision physics 20m
      Speaker: Keping Xie (University of Pittsburgh)
    • 4:30 PM 4:50 PM
      4 top measurements ATLAS+CMS 20m

      Cross-section measurements themselves

      Speaker: Niels Van Den Bossche (Ghent University (BE))
    • 5:00 PM 5:20 PM
      4 top interpretations and future ATLAS+CMS 20m

      What are the next steps? What do the results tell us? What interpretations?

      Speaker: Abhishek Sharma (University of British Columbia (CA))
    • 5:30 PM 6:00 PM
      Young Scientist Forum: YSF 1
      • 5:30 PM
        YSF ATLAS 1: Differential cross-sections of ttZ 10m
        Speaker: Harriet Watson (University of Glasgow (GB))
      • 5:45 PM
        YSF CMS: Search for extra Higgs bosons through same-sign top-quark production in association with an extra jet 10m
        Speaker: Mr Ting-Hsiang Hsu (National Taiwan University (TW))
    • 6:00 PM 7:00 PM
      Poster session
      • 6:00 PM
        Fabrication of muon drift tubes for the HL-LHC upgrade of the ATLAS muon spectrometer 1m
        Speaker: Rongqian Qian (Michigan State University (US))
      • 6:01 PM
        Luminosity determination using Z boson production at the CMS experiment 1m
        Speaker: David Walter (CERN)
      • 6:02 PM
        Application of Machine Learning Based Top Quark and W Jet Tagging to Hadronic Four-Top Final States Induced by SM as well as BSM Processes 1m
        Speaker: Petr Baron (Palacky University (CZ))
      • 6:03 PM
        Studies on the improvement of the matching uncertainty definition in top-quark processes simulated with Powheg+Pythia 1m
        Speaker: Dominic Hirschbuehl (Bergische Universitaet Wuppertal (DE))
      • 6:04 PM
        The search for new particles decaying to top-antiquark pairs is presented using data collected by the CMS detector with proton-proton collisions and center of mass energy of 13 TeV 1m
        Speakers: Beren Ozek (University of Illinois at Chicago (US)), Ricardo Escobar Franco (University of Illinois at Chicago (US))
      • 6:05 PM
        Machine Learning to Reduce PDF Uncertainties 1m
        Speaker: Jason P. Gombas (Michigan State University (US))
      • 6:06 PM
        4-top production and flavor tagging with ATLAS 1m
        Speaker: Hieu Le (Michigan State University (US))
      • 6:07 PM
        Comparative Analysis of Uncertainties in Top Quark Event Characteristics at HL-LHC and FCC Particle Detectors 1m
        Speakers: Grace Julia Bowling (Purdue University (US)), Lingqiang He (Purdue University (US))
      • 6:08 PM
        Projected top quark pole mass improvements from updated PDFs in future hadron colliders 1m
        Speaker: Jarrett Fein (Michigan State University)
      • 6:09 PM
        Track clustering with a quantum annealer for primary vertex reconstruction at hadron colliders 1m
        Speaker: Andrew Wildridge (Purdue University (US))
      • 6:10 PM
        Recent Progress in Lattice Calculations of Nucleon Parton Distributions 1m
        Speaker: Huey-Wen Lin
      • 6:11 PM
        Design, manufacturing of IT, OT and timing layer support structures 1m
        Speakers: Andreas Werner Jung (Purdue University (US)), Sushrut Rajendra Karmarkar (Purdue University (US))
      • 6:12 PM
        Quantum Entanglement and Bell Non-Locality in Semi-Leptonic Top Decays 1m
        Speaker: Tong Wu (University of Pittsburgh)
      • 6:13 PM
        DNN-based identification of additional b jets for a differential ttbb cross section measurement 1m
        Speaker: Juhee Song (Vrije Universiteit Brussel (BE))
    • 7:00 PM 8:00 PM
      Dinner and poster session 1h

      Street Tacos: carne asada or spicy chicken, corn/rice/beans/chips/guac, pico de gallo/chipotle cream/mexican crema/cotija cheese/lettuce/cilantro/onions/salsa, Chicken Tortilla Soup, Southwest Style Salad, Sauteed Peppers and Onion, Passion Fruit Panna Cotta

    • 8:45 AM 9:00 AM
    • 9:00 AM 9:20 AM
      ttbb / ttcc ATLAS+CMS 20m
      Speaker: Jan van der Linden (Ghent University (BE))
    • 9:30 AM 9:50 AM
      Study of additional jet activity in top quark pair production and decay at the LHC 20m
      Speaker: Michele Lupattelli
    • 10:00 AM 10:20 AM
      ttH, tH ATLAS+CMS 20m
      Speaker: Lucia Masetti (Johannes Gutenberg Universitaet Mainz (DE))
    • 10:30 AM 11:00 AM
      Coffee break 30m
    • 11:30 AM 11:50 AM
      EFT interpretations ATLAS+CMS 20m

      More global measurements and pheno interpretations

      Speaker: Peter Onyisi (University of Texas at Austin (US))
    • 12:00 PM 12:20 PM
      Simultaneous CTEQ-TEA extraction of PDFs and SMEFT parameters from jet and tt data 20m
      Speaker: Dr TIMOTHY J HOBBS (Argonne National Laboratory)
    • 12:30 PM 2:00 PM
      Lunch break 1h 30m

      Lunch buffet:
      Artisan Chopped Salad
      Farfalle "A la Grand Traverse Vodka" (pancetta)
      Pan-seared lake trout almondine or roasted Berkshire pork loin
      Green beans Persillade, Spring fried rice
      Artisan vanilla cheesecake

    • 2:00 PM 2:20 PM
      Top mass measurements ATLAS+CMS 20m
      Speaker: Mikael Myllymaki (Helsinki Institute of Physics (FI))
    • 2:30 PM 2:50 PM
      Top mass LHC combination 20m
      Speakers: Clara Nellist (University of Amsterdam and Nikhef (NL)), Clara Nellist (Nikhef National institute for subatomic physics (NL))
    • 3:00 PM 3:20 PM
      Energy-peak based method to measure top quark mass via B-hadron decay lengths 20m
      Speakers: Dr Doojin Kim (Texas A & M University (US)), Doojin Kim
    • 3:30 PM 4:00 PM
      Coffee break 30m
    • 4:00 PM 4:20 PM
      Top properties measurements ATLAS+CMS 20m

      Ancillary measurements of properties: colour reconnection, b-fragmentation, UE, + ‘Other properties’?: W helicity, (charge) asymmetry, width

      Speaker: Hugo Alberto Becerril Gonzalez (Deutsches Elektronen-Synchrotron (DE))
    • 4:30 PM 6:15 PM
      Young Scientist Forum: YSF 2
      • 4:30 PM
        YSF ATLAS 2 10m
        Speaker: Sahibjeet Singh (University of Toronto (CA))
      • 4:45 PM
        Beyond the narrow-width limit for off-shell and boosted differential top quark decays 10m

        The two canonical approaches to describing top quark decay are on the one hand calculations in the narrow-width (NW) limit and on the other hand full off-shell fixed-order computations. The NW limit allows one to factorise the production and the decay process and thus to treat the top quark as an on-shell particle such that the spin-density formalism can be applied. Full off-shell fixed-order calculations take into account both resonant and non-resonant effects as well as non-factorisable contributions, as a result the computations are more involved, in particular when including QCD corrections.

        In our work we pursue a factorised approach that includes the spin-density formalism and allows for the description of off-shell effects of the top quark within the effective field theory treatment of soft-collinear effective theory (SCET), which thus can also be used for resummation. Our approach relies on boosted top quark production, where the decay products are in the top quark resonance region. In this talk I will introduce the theoretical ingredients to describe top quark decay in SCET. I will then illustrate at tree-level the calculation of two differential observables using this framework.

        When including QCD corrections we pursue a semi-analytic approach, where effects related to the top quark decay can be treated numerically while the resummation can still be performed in an analytic setting.

        Speaker: Ines Ruffa
      • 5:00 PM
        YSF CMS: Inclusive and differential measurement of ttbb production 10m
        Speaker: Emanuel Lorenz Pfeffer (KIT - Karlsruhe Institute of Technology (DE))
      • 5:15 PM
        Uncovering New Higgs Bosons in the ATLAS Analysis of Differential t-tbar Cross-sections 10m

        ATLAS found that none of the various Standard Model simulations used by them can describe the differential lepton distributions measured in their ttbar analysis reasonably well. Therefore, we take the possibility that this measurement might have new physics contamination and study a benchmark model motivated by existing indications for di-photon resonances: A heavy scalar decays into two lighter Higgs bosons with masses of 152 GeV and 95 GeV. Subsequently, the lighter Higgs bosons decay to WW and bb, respectively. We find that in this case, the description of data is very much improved, resulting in a preference for the new physics model over the Standard Model hypothesis of at least 5.6 sigma.

        Speaker: Dr Sumit Banik (University of Zurich & PSI)
      • 5:30 PM
        YSF CMS: Probing EFT models using top quark production in multilepton final states 10m
        Speaker: Aashwin Basnet (Ohio State University (US))
      • 5:45 PM
        YSF ATLAS 3: t-channel single top-quark production 10m
        Speaker: Joshua Aaron Reidelsturz (Bergische Universitaet Wuppertal (DE))
      • 6:00 PM
        Optimizing Entanglement and Bell Inequality Violation in Top Anti-Top Events 10m

        When a top and an anti-top are produced at colliders their spins are correlated. Furthermore, when the top and anti-top system is interpreted as a quantum state, the system can exhibit entanglement and can violate Bell's inequality. Treating the system as a quantum state requires using the same axes to measure the top and anti-top spins in all events. In practice, most studies allow the axes to vary event-by-event, such that observables are angular-averaged. This averaging introduces a dependence on the spin axes that were chosen. In this work, we show that the basis which diagonalizes the spin-spin correlations is optimal for maximizing spin correlations, entanglement, and the violation of Bell's inequality. Since detecting violations of Bell's inequality will likely require the full dataset of the high-luminosity run of the Large Hadron Collider, optimizing detection is crucial.

        Speaker: Kun Cheng (Peking University)
    • 7:00 PM 8:00 PM
      Dinner 1h

      Buffet dinner at 7pm, bar starting at 6:30pm
      Artisan Chopped salad, Cesar Salad
      Gnochi Lamb Bolognese
      Slow baked whole Salmon or Midwest Strip Steak Roast Beef
      Spring medley, carrots, turnips pattypan
      Smashed fingerling potatoes
      Lemon Meringue Tart

    • 9:00 PM 10:00 PM
      Young Scientist meeting with speakers: Young scientist meeting with speakers Dayclub (Delamar hotel)


      Delamar hotel

    • 9:00 AM 9:20 AM
      FCNC, LFV ATLAS 20m
      Speaker: Pavol Bartos (Comenius University (SK))
    • 9:30 AM 9:50 AM
      FCNC, LFV CMS 20m
      Speaker: Tae Jeong Kim (Hanyang University (KR))
    • 10:00 AM 10:20 AM
      Accessing CKM suppressed top decays at the LHC 20m
      Speakers: Manuel Szewc, Manuel Szewc
    • 10:30 AM 11:00 AM
      Coffee break 30m
    • 11:00 AM 11:20 AM
      BSM searches in the top final state ATLAS 20m
      Speaker: Wade Cameron Fisher (Michigan State University (US))
    • 11:30 AM 11:50 AM
      BSM searches in the top final state CMS 20m
      Speaker: Emanuele Usai (University of Alabama (US))
    • 12:15 PM 1:15 PM
      Lunch break 1h

      Pick up sandwich boxes in Bistro area.
      Each box will be labeled with you name (if you made a choice by the deadline). If you don't find a box with your name, there should be a few extra sandwiches available (Hummus or Artisan BLT or Smoked Turkey Club).
      Each box includes water, Great Lakes potato chips, whole fruit and sweet treat.

    • 1:15 PM 5:15 PM
      Excursion to Sleeping Bear Dunes 4h

      Start boarding at 1:15pm, busses leave at 1:30pm.

    • 5:30 PM 8:15 PM
      Conference dinner at the Homestead Resort 2h 45m

      Busses will drive there directly from the Sleeping Bear Dunes.
      Reception at the lodge and the mountain top dual-view patio at 5:30pm.
      There will be a cash bar at the lodge (cash only, no credit cards), please have cash available.
      $14 | Liquor $7 | Imported Beers / White Claws (Labatt Blue, Stella, Corona)
      $5 | Domestic Beers (Bud Light, Michelob Ultra, Pabst Blue Ribbon, Busch NA) $8 | Wine / Draft Beer (Miller Lite, Arbor Buzzsaw IPA, Bell's Seasonal)
      $3 | Soda / Non - Alcoholic
      Dinner starting at 6:30pm

    • 8:15 PM 9:15 PM
      Bus transport back to Delamar hotel 1h

      Start boarding busses at 8:15pm, busses depart at 8:30pm

    • 9:00 AM 12:20 PM
      Theory Mini Workshop on Quantum Sensing: Theory mini workshop quantum sensing
      • 9:00 AM
        Quantum Sensing with top quarks 20m
        Speaker: Prof. Gilad Perez (Weizmann)
      • 9:30 AM
        Entanglement and Bell Inequalities with boosted tops 20m
        Speaker: Dorival Gonçalves (Oklahoma State University)
      • 10:00 AM
        Top and non-linear QM 20m
        Speaker: Surjeet Rajendran
      • 10:50 AM
        Coffee break 30m
      • 11:20 AM
        Quantum entanglement and top spin correlations in SMEFT at higher orders 20m
        Speakers: Claudio Severi (Universita e INFN, Bologna (IT)), Claudio Severi (University of Manchester)
      • 11:50 AM
        Discussion 20m
        Speakers: Alexander Mitov (University of Cambridge (GB)), Prof. Gilad Perez (Weizmann), Kirtimaan Ajaykant Mohan
    • 12:30 PM 2:00 PM
      Lunch break 1h 30m

      Lunch buffet: Wedge salad, Rigatoni Al Arrabiata, Herb-crusted Halibut or Rotisserie Chicken, Spring Medley (Carrots, Turnips, Pattypan), olive oil cake

    • 2:00 PM 2:20 PM
      Top tagging and machine learning 20m
      Speaker: Sung Hak Lim (Rutgers University)
    • 2:30 PM 2:50 PM
      Spin and entanglement ATLAS 20m
      Speaker: Yoav Afik (University of Chicago (US))
    • 3:00 PM 3:15 PM
      A few remarks 15m
      Speaker: Alexander Mitov (University of Cambridge (GB))
    • 3:15 PM 3:25 PM
      Extended general discussion 10m

      This is meant to capture general discussion and steps forward but not experiment specific Q&A, which is handled in the allocated time after each talk in this session.

    • 3:35 PM 4:05 PM
      Coffee break 30m
    • 4:10 PM 4:30 PM
      Axions and top-quark physics 20m
      Speaker: Simone Tentori (UC Louvain)
    • 4:40 PM 5:00 PM
      Joker 1 ATLAS 20m
      Speaker: Prof. Claudia Glasman (Universidad Autonoma de Madrid (ES))
    • 5:10 PM 5:30 PM
      Search for flavor-changing neutral current interactions for the top quark and Higgs boson at CMS 20m
      Speaker: Kaitlin Salyer (Boston University (US))
    • 5:40 PM 6:00 PM
      Joker 2 ATLAS 20m
      Speaker: Petr Baron (Palacky University (CZ))
    • 9:00 PM 10:00 PM
      Young Scientist meeting with speakers: Young scientist meeting with speakers
    • 9:00 AM 9:20 AM
      HL-LHC + Techniques 20m
      Speaker: Matteo Defranchis (CERN)
    • 9:30 AM 9:50 AM
      Machine learning 20m

      experiment+’pheno’? + flavour tagging?

      Speaker: Michael James Fenton (University of California Irvine (US))
    • 10:00 AM 10:20 AM
      Far future Top 20m

      TOP perspective on multiple proposals(FCC, µ-collider, C^3,...)

      Speaker: Marcel Vos (IFIC Valencia (ES))
    • 10:30 AM 11:00 AM
      Coffee break 30m
    • 11:00 AM 11:40 AM
      Theory summary 40m
      Speaker: Radja Boughezal
    • 11:45 AM 12:25 PM
      Experimental summary 40m
      Speaker: Veronique Boisvert (Royal Holloway, University of London)
    • 12:30 PM 12:35 PM
      Announcement of Top2024 5m

      LOC for Top2024

    • 12:35 PM 1:45 PM
      Sandwich lunch 1h 10m

      Sandwich lunch buffet: Chopped salad, potato chips, vanilla cheesecake.
      Choice of sandwich: Tomato, Smoked Turkey Club, Prosciutto & Ham