16th International Workshop on Top Quark Physics (TOP2023)

24 Sept 2023, 11:00 → 29 Sept 2023, 14:00 US/Eastern

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.

Workshop photo

16th-TOP-2023-Poster.pdf

Proceedings template.tgz

Top2023 group photo.jpg

Sunday, 24 September

11:00 → 16:00 Outreach, Tevatron reunion: Outreach at 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))

16:30 → 19:30 Outreach, Tevatron reunion: Tevatron Top Reunion reception / Top23 welcome reception

Conveners: Andreas Werner Jung (Purdue University (US)), Jon Wilson (Baylor University (US)), Regina Demina (University of rochester), Reinhard Schwienhorst (Michigan State University (US))

Monday, 25 September

09:00 → 09:30 Registration

09:30 → 09:40 Welcome

2023-09 Top Workshop Introduction.pdf

09:40 → 10:20 Keynote talk

Speaker: Prof. Gilad Perez (Weizmann)

GiladPerez_Top2023_FIN.pdf

10:30 → 11:00 Coffee break

11:00 → 11:20 Top quark pair production, inclusive and differential, ATLAS+CMS

Speaker: David Walter (CERN)

230925_tt_dwalter.pdf

11:30 → 11:50 ttH/ ttW in NNLO QCD (zoom)

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

Speaker: Massimiliano Grazzini (University of Zurich (CH))

Grazzini_Top2023.pdf

12:00 → 12:20 ttW ATLAS+CMS

Speaker: Matthew Henry Klein (University of Michigan (US))

mk_top20230924 (9).pdf

12:30 → 14:00 Lunch break

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

14:00 → 14:20 Top+X ATLAS+CMS

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

Speaker: Dominik Babal (Slovak Academy of Sciences (SK))

TOP23_ttZ_tty.pdf

14:30 → 14:50 Single top quark production, inclusive and differential, ATLAS+CMS

Speakers: Laura Pintucci, Laura Pintucci (Universita degli Studi di Udine (IT))

Proceedings

SingleTop_LauraPintucci_TOP23_final.pdf

15:00 → 15:20 Associated single top production (t+X) ATLAS + CMS

Speaker: Nils Faltermann (KIT - Karlsruhe Institute of Technology (DE))

NF_single_top_associated.pdf

Proceedings

15:30 → 16:00 Coffee break

16:00 → 16:20 PDFs from future colliders for precision physics

Speaker: Keping Xie (University of Pittsburgh)

FutureColliders4PDFs.pdf

16:30 → 16:50 4 top measurements ATLAS+CMS

Cross-section measurements themselves

Speaker: Niels Van Den Bossche (Ghent University (BE))

fourtops_TOP23_NVDB.pdf

Proceedings

17:00 → 17:20 4 top interpretations and future ATLAS+CMS

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

Speaker: Abhishek Sharma (University of British Columbia (CA))

fourtop_interpretations.pdf

17:30 → 18:00 Young Scientist Forum: YSF 1

17:30 YSF ATLAS 1: Differential cross-sections of ttZ

Speaker: Harriet Watson (University of Glasgow (GB))

HWatson_TOP2023_Differential_Xsec_ttZ.pdf

17:45 YSF CMS: Search for extra Higgs bosons through same-sign top-quark production in association with an extra jet

Speaker: Mr Ting-Hsiang Hsu (National Taiwan University (TW))

Proceedings

TOP2023_YSF.pdf

18:00 → 19:00 Poster session

Poster award voting form

18:00 Fabrication of muon drift tubes for the HL-LHC upgrade of the ATLAS muon spectrometer

Speaker: Rongqian Qian (Michigan State University (US))

sMDT_poster_v6 (1).pdf

18:01 Luminosity determination using Z boson production at the CMS experiment

Speaker: David Walter (CERN)

top2023_poster_dwalter.pdf

18:02 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

Speaker: Petr Baron (Palacky University (CZ))

ML_TopTagging_4top_Petr_Baron.pdf

Proceedings

18:03 Studies on the improvement of the matching uncertainty definition in top-quark processes simulated with Powheg+Pythia

Speaker: Dominic Hirschbuehl (Bergische Universitaet Wuppertal (DE))

Top23.pdf

18:04 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

Speakers: Beren Ozek (University of Illinois at Chicago (US)), Ricardo Escobar Franco (University of Illinois at Chicago (US))

poster_Top2023.pdf

18:05 Machine Learning to Reduce PDF Uncertainties

Speaker: Jason P. Gombas (Michigan State University (US))

Machine Learning to Reduce PDF Uncertainties.pdf

Proceedings

18:06 4-top production and flavor tagging with ATLAS

Speaker: Hieu Le (Michigan State University (US))

poster_Top23.pdf

18:07 Comparative Analysis of Uncertainties in Top Quark Event Characteristics at HL-LHC and FCC Particle Detectors

Speakers: Grace Julia Bowling (Purdue University (US)), Lingqiang He (Purdue University (US))

top23poster.pdf

18:08 Projected top quark pole mass improvements from updated PDFs in future hadron colliders

Speaker: Jarrett Fein (Michigan State University)

18:09 Track clustering with a quantum annealer for primary vertex reconstruction at hadron colliders

Speaker: Andrew Wildridge (Purdue University (US))

18:10 Recent Progress in Lattice Calculations of Nucleon Parton Distributions

Speaker: Huey-Wen Lin

Recent Progress in Lattice Calculations of Nucleon Parton Distributions

18:11 Design, manufacturing of IT, OT and timing layer support structures

Speakers: Andreas Werner Jung (Purdue University (US)), Sushrut Rajendra Karmarkar (Purdue University (US))

18:12 Quantum Entanglement and Bell Non-Locality in Semi-Leptonic Top Decays

Speaker: Tong Wu (University of Pittsburgh)

18:13 DNN-based identification of additional b jets for a differential ttbb cross section measurement

Speaker: Juhee Song (Vrije Universiteit Brussel (BE))

Juhee_TOP_fianl_poster.pdf

19:00 → 20:00 Dinner and poster session

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

Tuesday, 26 September

08:45 → 09:00 Poster awards

Speaker: Anthony Michael Liss (City University of New York (US))

DSC_5010.JPG

DSC_5011.JPG

DSC_5012.JPG

Top2023PosterPrizeCertificateFirstPrize.pdf

Top2023PosterPrizeCertificateSecondPrize.pdf

Top2023PosterPrizeCertificateThirdPrize.pdf

09:00 → 09:20 ttbb / ttcc ATLAS+CMS

Speaker: Jan van der Linden (Ghent University (BE))

TOP2023-JvdL-ttbbcc.pdf

09:30 → 09:50 Study of additional jet activity in top quark pair production and decay at the LHC

Speaker: Michele Lupattelli

Lupattelli_TOP23.pdf

Proceedings

10:00 → 10:20 ttH, tH ATLAS+CMS

Speaker: Lucia Masetti (Johannes Gutenberg Universitaet Mainz (DE))

Higgs_Top_ATLAS_CMS.pdf

10:30 → 11:00 Coffee break

11:00 → 11:20 EFT-related measurements ATLAS+CMS

Measurements at ‘reco level’

Speaker: Kelci Ann Mohrman (University of Florida (US))

Proceedings

top23_topeft_kmohrman.pdf

11:30 → 11:50 EFT interpretations ATLAS+CMS

More global measurements and pheno interpretations

Speaker: Peter Onyisi (University of Texas at Austin (US))

20230926_top.pdf

12:00 → 12:20 Simultaneous CTEQ-TEA extraction of PDFs and SMEFT parameters from jet and tt data

Speaker: Dr TIMOTHY J HOBBS (Argonne National Laboratory)

Hobbs_TOP23.pdf

12:30 → 14:00 Lunch break

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

14:00 → 14:20 Top mass measurements ATLAS+CMS

Speaker: Mikael Myllymaki (Helsinki Institute of Physics (FI))

Proceddings

Top_Mass_Measurements_TOP2023_260923_final.pdf

14:30 → 14:50 Top mass LHC combination

Speakers: Clara Nellist (University of Amsterdam and Nikhef (NL)), Clara Nellist (Nikhef National institute for subatomic physics (NL))

2023-09-26_TOPConf_TopMassCombination_CONF.pdf

15:00 → 15:20 Energy-peak based method to measure top quark mass via B-hadron decay lengths

Speakers: Doojin Kim, Dr Doojin Kim (Texas A & M University (US))

Presentation_TOP2023_DoojinKim.pdf

Presentation_TOP2023_DoojinKim.pptx

15:30 → 16:00 Coffee break

16:00 → 16:20 Top properties measurements ATLAS+CMS

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))

Proceedings

Top2023.pdf

16:30 → 18:15 Young Scientist Forum: YSF 2

16:30 YSF ATLAS 2

Speaker: Sahibjeet Singh (University of Toronto (CA))

SS5TeVTopConf.pdf

16:45 Beyond the narrow-width limit for off-shell and boosted differential top quark decays

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

Proceedings

TOP2023_ruffa.pdf

17:00 YSF CMS: Inclusive and differential measurement of ttbb production

Speaker: Emanuel Lorenz Pfeffer (KIT - Karlsruhe Institute of Technology (DE))

23-09-26_ttbb_differential_CMS_Emanuel_Pfeffer.pdf

Proceedings

17:15 Uncovering New Higgs Bosons in the ATLAS Analysis of Differential t-tbar Cross-sections

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)

Proceedings

TOP_2023.pdf

17:30 YSF CMS: Probing EFT models using top quark production in multilepton final states

Speaker: Aashwin Basnet (Ohio State University (US))

abasnet_multilepEFT_top2023.pdf

Proceedings

17:45 YSF ATLAS 3: t-channel single top-quark production

Speaker: Joshua Aaron Reidelsturz (Bergische Universitaet Wuppertal (DE))

tchannel_top23.pdf

18:00 Optimizing Entanglement and Bell Inequality Violation in Top Anti-Top Events

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)

Optimal-basis-tt.pdf

19:00 → 20:00 Dinner

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

21:00 → 22:00 Young Scientist meeting with speakers: Young scientist meeting with speakers

Wednesday, 27 September

09:00 → 09:20 FCNC, LFV ATLAS

Speaker: Pavol Bartos (Comenius University (SK))

Proceedings

Top2023_bartos_FCFN_cLFV.pdf

09:30 → 09:50 FCNC, LFV CMS

Speaker: Tae Jeong Kim (Hanyang University (KR))

TOP2023_FCNC_LFV_TJ.pdf

10:00 → 10:20 Accessing CKM suppressed top decays at the LHC

Speakers: Manuel Szewc, Manuel Szewc

Proceedings

TOP23_SZEWC.pdf

10:30 → 11:00 Coffee break

11:00 → 11:20 BSM searches in the top final state ATLAS

Speaker: Wade Cameron Fisher (Michigan State University (US))

fisher_top2023.pdf

11:30 → 11:50 BSM searches in the top final state CMS

Speaker: Emanuele Usai (University of Alabama (US))

top23_usai.pdf

12:15 → 13:15 Lunch break

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.

13:15 → 17:15 Excursion to Sleeping Bear Dunes

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

Excursion details

Excursion.pdf

17:30 → 20:15 Conference dinner at the Homestead Resort

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

20:15 → 21:15 Bus transport back to Delamar hotel

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

Thursday, 28 September

09:00 → 12:20 Theory Mini Workshop on Quantum Sensing: Theory mini workshop quantum sensing

09:00 Quantum Sensing with top quarks

Speaker: Prof. Gilad Perez (Weizmann)

GiladPerez_Nelson-Barr ULDM.pdf

09:30 Entanglement and Bell Inequalities with boosted tops

Speaker: Dorival Gonçalves (Oklahoma State University)

Dorival_top2023.pdf

10:00 Top and non-linear QM

Speaker: Surjeet Rajendran

Top Conference.pdf

10:50 Coffee break

11:20 Quantum entanglement and top spin correlations in SMEFT at higher orders

Speakers: Claudio Severi (Universita e INFN, Bologna (IT)), Claudio Severi (University of Manchester)

severi.pdf

11:50 Discussion

Speakers: Alexander Mitov (University of Cambridge (GB)), Prof. Gilad Perez (Weizmann), Kirtimaan Ajaykant Mohan

12:30 → 14:00 Lunch break

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

14:00 → 14:20 Top tagging and machine learning

Speaker: Sung Hak Lim (Rutgers University)

Top.odp

Top.pdf

Top.pdf

14:30 → 14:50 Spin and entanglement ATLAS

Speaker: Yoav Afik (University of Chicago (US))

Quantum_Tops___TOP2023.pdf

15:00 → 15:15 A few remarks

Speaker: Alexander Mitov (University of Cambridge (GB))

AlexanderMitov-Top23-2023.pdf

15:15 → 15:25 Extended general discussion

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.

15:35 → 16:05 Coffee break

16:10 → 16:30 Axions and top-quark physics

Speaker: Simone Tentori (UC Louvain)

Proceedings

tentori_TOP2023.pdf

16:40 → 17:00 Joker 1 ATLAS

Speaker: Prof. Claudia Glasman (Universidad Autonoma de Madrid (ES))

top2023_claudia_glasman.pdf

17:10 → 17:30 Search for flavor-changing neutral current interactions for the top quark and Higgs boson at CMS

Speaker: Kaitlin Salyer (Boston University (US))

2023_09_28_Salyer_FCNC.key

2023_09_28_Salyer_FCNC.pdf

17:40 → 18:00 Joker 2 ATLAS

Speaker: Petr Baron (Palacky University (CZ))

ATL-COM-PHYS-2023-856_v7.pdf

Proceedings

21:00 → 22:00 Young Scientist meeting with speakers: Young scientist meeting with speakers

Friday, 29 September

08:59 → 09:00 Wrap-up

Speaker: Reinhard Schwienhorst (Michigan State University (US))

2023-09 Top Workshop Introduction.pdf

09:00 → 09:20 HL-LHC + Techniques

Speaker: Matteo Defranchis (CERN)

Defranchis_Top23.pdf

09:30 → 09:50 Far future Top

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

Speaker: Marcel Vos (IFIC Valencia (ES))

TopFutureCollider.pdf

10:00 → 10:20 Machine learning

experiment+’pheno’? + flavour tagging?

Speaker: Michael James Fenton (University of California Irvine (US))

MFenton_Top2023.pdf

10:30 → 11:00 Coffee break

11:00 → 11:40 Theory summary

Speaker: Radja Boughezal

Boughezal-TopSummary.pdf

11:45 → 12:25 Experimental summary

Speaker: Veronique Boisvert (Royal Holloway, University of London)

ExperimentalSummary_2023.pdf

12:30 → 12:35 Announcement of Top2024

LOC for Top2024

Top2024.pdf

12:35 → 13:00 Sandwich lunch

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