LHC TOP WG meeting

5 Jun 2023, 13:00 → 7 Jun 2023, 15:45 Europe/Zurich

40/S2-D01 - Salle Dirac (CERN)

Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Università di Bologna), Maria Aldaya Martin (DESY), Wolfgang Wagner (Bergische Universitaet Wuppertal (DE))

This periodic open meeting of the LHC TOP Working Group takes place twice a year at CERN. 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. 

The meeting is planned to be hybrid (in-person + zoom).
 

Meeting rooms
In the course of the meeting we will use two different meeting rooms at CERN.
MONDAY (all sessions)          Salle Bohr (room 40/S2-B01)
TUESDAY (all sessions)         Salle Dirac (room 40/S2-D01)
WEDNESDAY (all sessions)   Salle Dirac (room 40/S2-D01)

Recordings of the sessions are available below.

050623_afternoon.mp4

060623_afternoon.mp4

060623_morning.mp4

070623_afternoon.mp4

070623_morning.mp4

Monday 5 June

13:00 → 13:20 Introduction

Speakers: Prof. Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Università di Bologna), Maria Aldaya Martin (DESY), Wolfgang Wagner (Bergische Universitaet Wuppertal (DE))

Intro_Open_Meeting_June_5_2023.pdf

Poll for attending the dinner on Tuesday, June 6

Top2023_Advertising.pdf

13:20 → 13:30 Discussion

13:30 → 13:50 Common MC settings and other LHCtopWG activities

Speakers: Giulia Negro (Purdue University (US)), Reinhard Schwienhorst (Michigan State University (US))

commonMC_LHCtopWG_5June2023_Negro.pdf

13:50 → 14:00 Discussion

14:00 → 14:20 ATLAS-Highlight-1: t-channel cross section measurement

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

tchannel_LHCWG.pdf

14:20 → 14:30 Discussion

14:30 → 14:50 ATLAS-CMS comparison: tt cross sections in Run3

Speakers: Giovanni Guerrieri (Universita degli Studi di Udine (IT)), Giovanni Guerrieri (INFN - National Institute for Nuclear Physics), Joscha Knolle (Ghent University (BE))

JK_230605_ttbar_run3_v6.pdf

14:50 → 15:00 Discussion

15:00 → 15:30 CMS-Highlight-1: ttbb inclusive and differential cross sections, including ATLAS+CMS ttbb modelling comparisons

Speaker: Jan van der Linden (KIT - Karlsruhe Institute of Technology (DE))

OpenLHCTopWG-ttbb-JvdL.pdf

15:30 → 15:40 Discussion

15:40 → 16:10 Coffee break

16:10 → 17:50 Mini-session: News about four top-quarks

16:10 ATLAS-CMS comparison: latest 4top results

Speakers: Niels Van Den Bossche (Ghent University (BE)), Zhi Zheng (SLAC National Accelerator Laboratory (US))

Four_Top_CMS+ATLAS.pdf

16:40 Discussion

16:50 On the BSM reach of 4top production at the LHC

2302.08281 [hep-ph]

Speakers: Panagiotis Stylianou, Panagiotis Stylianou (CERN)

four_top_bsm_reach_lhc.pdf

17:10 Discussion

17:20 4top resummation at threshold

2212.03259 [hep-ph]

Speaker: Anna Kulesza (University of Muenster)

topwg23.pdf

17:40 Discussion

Tuesday 6 June

09:00 → 13:05 Mini-session: Theory advancements on top-quark mass

09:00 Investigation of scale dependence in the MSR and MSbar top mass schemes for the tt invariant mass differential xsec using LHC data

https://arxiv.org/abs/2301.03546

Speaker: Dr Toni Makela (NCBJ)

investigation_of_scale_dependence_in_MSR_and_MSbar.pdf

09:20 Discussion

09:30 New top mass calibration results for inclusive and differential top quark mass observables

Speaker: Andre Hoang

Hoang-mt-Calibration-Update.pdf

09:50 Discussion

10:00 Phenomenological analysis of LHC ttbar data at NNLO accuracy using the MATRIX framework

Speakers: Oleksandr Zenaiev (Hamburg University), Oleksandr Zenaiev

Zenaiev-LHCtopWG-Jun23.pdf

10:20 Discussion

11:00 Coffee break

11:20 Linear power correction for single top production

2302.02729 [hep-ph]

Speaker: Melih Arslan Ozcelik (KIT - Karlsruhe Institute of Technology (DE))

TopLHCWG23_OZCELIK.pdf

11:40 Discussion

11:50 ML approaches for parameter reweighting in MC samples for top production

Speaker: Valentina Guglielmi (Deutsches Elektronen-Synchrotron (DE))

LHC-Top-WG.pdf

12:10 Discussion

12:20 Thoughts on using ML methods to improve the understanding of ATLAS and CMS systematics

Speaker: Jan Kieseler (CERN)

20230606_ML_discuss.pdf

12:30 Discussion

12:35 Informal discussion on status of tt threshold corrections

Speakers: Andre Hoang, Prof. Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Università di Bologna)

Hoang-threshold-issues.pdf

Hoang-threshold-issues.ppt

13:05 → 14:00 Lunch break

14:30 → 14:50 ATLAS-Highlight-2: Search for charged lepton flavour violation in top quark decays

Speaker: Jacob Julian Kempster (University of Sussex (GB))

JKempster_TopCLFV_LHCTOPWG_6June23.pdf

14:50 → 15:00 Discussion

15:00 → 15:20 SMEFT top decay + entanglement

2210.09330 [hep-ph]

Speaker: Claudio Severi (Universita e INFN, Bologna (IT))

topwg.pdf

15:20 → 15:30 Discussion

15:30 → 15:50 Quantum discord and steering in top quarks at the LHC

2209.03969 [quant-ph]

Speakers: Juan Ramon Munoz De Nova, Yoav Afik (CERN)

Quantum_Tops___LHC_Top_WG.pdf

15:50 → 16:00 Discussion

16:00 → 16:20 ATLAS-Highlight-3: substructure

Speaker: Federica Fabbri (University of Glasgow (GB))

LHCTopWG.pdf

16:20 → 16:30 Discussion

16:30 → 16:45 Opportunities for BSM physics in top final states at a future e+e- factory

Speaker: Roberto Franceschini (Rome 3 U.)

Top LHC WG ECFA-WG1-SRCH.pdf

16:45 → 16:50 Discussion

19:00 → 21:00 Dinner

Wednesday 7 June

10:00 → 10:30 ATLAS-CMS comparison: latest ttW results

Speakers: Carlos Vico Villalba (Universidad de Oviedo (ES)), Marcel Niemeyer (Georg August Universitaet Goettingen (DE))

LHC_Top_WG_ttW_latest_results.pdf

10:30 → 10:40 Discussion

10:40 → 11:00 Status/Update NNLO calculation in ttW

Speakers: Chiara Savoini (University of Zurich), Chiara Savoini

ttW_talk_TOPWG_Savoini.pdf

11:00 → 11:10 Discussion

11:10 → 13:00 Lunch break

13:00 → 15:15 Mini-session: EFT

13:00 CMS-Highlight-2: Probing EFT models using ttX in multiple lepton final states

Speaker: Reza Goldouzian (University of Notre Dame (US))

2023_05_LHCTOPWG_Reza.pdf

13:20 Discussion

13:30 ATLAS+CMS comparison: latest results on FCNC (latest tgamma result from CMS, latest results from ATLAS)

Speakers: Gholamhossein Haghighat (Institute for Research in Fundamental Sciences (IR)), Wei-Ming Yao (Lawrence Berkeley National Lab. (US))

Presentation.pdf

13:50 Discussion

14:00 Simultaneous CTEQ-TEA extraction of PDFs and SMEFT parameters from jet and tt data

https://arxiv.org/abs/2211.01094

Speaker: Dr TIMOTHY J HOBBS (Argonne National Laboratory)

Hobbs_TOPWG-23.pdf

14:20 Discussion

14:30 The top quark legacy of the LHC Run2 for PDF and SMEFT analyses

https://arxiv.org/abs/2303.06159

Speaker: Dr Juan Rojo (VU Amsterdam and Nikhef)

rojo-SMEFTpdfs-LHCtopWG.pdf

14:50 Discussion

14:55 Joint discussion on all EFT contributions

15:15 → 15:35 CMS-Highlight-3: evidence for tWZ production in multilepton final states

Speaker: Alessia Saggio (Deutsches Elektronen-Synchrotron (DE))

LHCTopWG_tWZ_final.pdf

15:35 → 15:45 Discussion