13th International Workshop on Top-Quark Physics (TOP2020)

Sep 14, 2020, 2:00 PM → Sep 18, 2020, 6:00 PM Europe/Zurich

The 13th International Workshop on Top Quark Physics (TOP 2020) will bring together experimentalists and theorists to present and discuss the latest developments in top-quark physics. This year's meeting will be an on-line conference with support provided by IPPP Durham. The programme includes a mini-workshop entitled "Jets in top physics: substructure, tagging and machine learning".

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.  

Please note that all times correspond to CERN time. Presenters with standard 30 minute talks should speak for 25 minutes or less, leaving at least 5 minutes for questions.

The conference will be held on Zoom; information about how to join, and detailed instructions for participants, speakers, and session chairs is in the "Zoom Instructions" menu link.

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Mon, September 14

2:10 PM → 4:00 PM Plenary session

Convener: Benjamin Pecjak (IPPP Durham)

2:10 PM Remarks from Local Organising Committee

Speaker: Benjamin Pecjak

Intro.pdf

2:15 PM Remarks from International Advisory Committee

Speaker: Roberto Tenchini

2:20 PM Keynote

Speaker: Matthew McCullough

mccullough_top2020.pdf

3:00 PM Top-pair and single-top total cross sections, and in-situ systematic constraints

Speaker: Olga Bessidskaia Bylund

Bylund_totalXS_Top2020.pdf

3:30 PM NNLO QCD corrections to top-quark production and decay

Speaker: Rene Poncelet

poncelet.pdf

4:00 PM → 4:30 PM Coffee break

4:30 PM → 6:30 PM Plenary session

Convener: Wolfgang Wagner

4:30 PM Top-pair and single-top differential cross sections and unfolding techniques

Speaker: Otto Heinz Hindrichs

hindrichs_diffxsecs.pdf

5:00 PM NNLO QCD corrections to differential top-pair production with the MSbar mass

Speaker: Stefano Catani

catani_top2020.pdf

5:30 PM Measuring SM parameters with top-quark cross sections

Speaker: Matteo Defranchis

defranchis.pdf

6:00 PM Bottlenecks in precision top-quark measurements

Speaker: Valentina Vecchio

Top2020_VVecchio_Final.pdf

Tue, September 15

2:00 PM → 4:00 PM Plenary session

Convener: Maria Aldaya

2:00 PM Event generator set-up and definition of modelling uncertainties

Speaker: Simone Amoroso

TOP2020_amoroso.pdf

2:30 PM Theoretical issues in event generation

Speaker: Silvia Ferrario Ravasio

TOP2020_S_Ferrario_Ravasio.pdf

3:00 PM Off-shell vs on-shell modelling of top quarks in photon associated production

Speaker: Malgorzata Worek

Top2020_MWorek.pdf

3:30 PM Measurements of top-quark production in association with gauge bosons

Speaker: Rustem Ospanov

rospanov_top2020_topV_final.pdf

4:00 PM → 4:30 PM Coffee break

4:30 PM → 6:00 PM Plenary session

Convener: Małgorzata Worek

4:30 PM Results on t(t)H and four-top-quark production, and the treatment of ttX (W/Z/bb) backgrounds

Speaker: Korbinian Schweiger

TOP2020_ttH+4Top_Schweiger.pdf

5:00 PM ttW at NLO accuracy in QCD with realistic final states

Speaker: Giuseppe Bevilacqua

bevilacqua_TOP2020.pdf

5:30 PM Results on top-quark production with heavy-flavour jets

Speaker: Sebastien Wertz

wertz_TOP2020.pdf

Wed, September 16

12:50 PM → 1:50 PM Poster session

12:50 PM Differential cross section measurements of the tW process at CMS

Speaker: Victor Rodriguez Bouza

Bouza_Poster.pdf

Zoom room for poster session

12:50 PM Discovering elastic top production

Speaker: James William Howarth

Video Presentation

Zoom room

12:50 PM Measurement of differential cross sections and charge ratios for t-channel single top quark production in proton-proton collisions at 13 TeV

Speaker: Matthias Komm

komm_poster.pdf

Zoom room for poster session

12:50 PM NLO QCD corrections to full off-shell ttW+ production at the LHC

Speaker: Giovanni Pelliccioli

gpelliccioli_TOP2020.pdf

zoom_record_gpelliccioli_TOP2020.mp4

Zoom room for poster session

12:50 PM Novel flavour-changing neutral currents in the top quark sector

Speaker: Ana Peixoto

RareTopDecays_AnaPeixoto_PosterTop2020_13092020.pdf

RareTopDecays_AnaPeixoto_PosterTop2020.mp4

Zoom room for poster session

12:50 PM Search for scalar top quark pair production in the top corridor region with CMS

Speaker: Andrea Trapote Fernandez

poster_fernandez.pdf

Zoom room for poster session

12:50 PM The top quark electroweak couplings after LHC run2

Speaker: Victor Miralles Aznar

The_Top-quark EW_couplings_after_LHC_run2_VictorMiralles.mp4

The_Top-quark EW_couplings_after_LHC_run2_VictorMiralles.pdf

Zoom room for poster session

12:50 PM Top mass shift from recalibration of flavor-dependent jet energy corrections in the D0 lepton+jets top mass measurement

Abstract:
We investigate a possible explanation for the 2.4 GeV (2.7 sigma) difference in the top quark mass as measured by D0 and CMS, ATLAS and CDF. Our earlier investigation of the flavor-dependent Jet Energy Scale (flavor-JES) calibration suggested that the flavor-JES used by D0 for Run IIb may have converged to a non-global, unphysical minimum. The
study was based on internal documents released into the public domain after a 5-year moratorium. Furthermore, Run IIb makes up a majority of the full Run II dataset. In addition, the flavor-JES was found to be very sensitive to the parton shower model in Pythia 6 versus Herwig7, only former of which was used in the original flavor-JES study.

In this work we propagate the difference between the re-derived and the original flavor-JES into the top quark mass in the lepton+jet channel. This is done utilising publicly available information and published papers. We find that the flavor-JES is enough to fully explain the observed mass shift, with the Pythia6 and Herwig7 results differing by 1.32 GeV. A crude average of the shifts given by the two generators
results into a re-interpreted mass of 172.50 GeV. As a caveat, this work has been performed entirely outside of D0 collaboration, and only utilising documents (both published and internal) released to the public domain.

Speaker: Hannu Siikonen

siikonen_posterintro_top2020.mp4

siikonen_top2020poster_v3.pdf

Zoom room for poster session

12:50 PM ttW production: a very-complex process

Speakers: Marcos Miralles López, María Moreno Llácer

Link to pre-recorded video

poster_marcos_mirallesv4.pdf

Zoom room for poster session

1:50 PM → 2:00 PM Coffee break

2:00 PM → 3:40 PM Young scientist forum / Experimental Joker

Convener: Abideh Jafari

2:00 PM Exp. Joker

Speaker: Seth Moortgat

moortgat_ttcc.pdf

2:30 PM Top Quark Mass Determination at Future Lepton Colliders using Radiative Events

Speaker: Angelika Widl

widl.pdf

2:40 PM Four Tops for the Future

Speaker: Tobias Theil

Top2020_Theil.pdf

2:50 PM Quantum Information and Entanglement with Top Quarks at the LHC

Speaker: Yoav Afik

YSF_Afik_TOP2020.pdf

3:00 PM Measurement of the inclusive and differential cross- section of a top quark pair in association with a Z boson at 13 TeV with the ATLAS detector

Speaker: Florian Christoph Fischer

Top2020_YSF_FFischer.pdf

3:10 PM Measurement of the top quark Yukawa coupling using ttbar event kinematics in the dilepton final state

Speaker: Evan Altair Ranken

Ranken_YSF_TOP2020.pdf

3:20 PM Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at 13 TeV using the ATLAS detector

Speaker: Riccardo Poggi

poggi_top2020_v3.pdf

3:30 PM Search for CP violating anomalous top quark couplings in proton-proton collisions at sqrt(s) = 13 TeV with CMS

Speaker: SeungKyu Ha

top2020_seungkyu.pdf

3:40 PM → 4:00 PM Coffee break

4:00 PM → 6:00 PM Plenary session

Convener: Michal Czakon

4:00 PM Top-quark pair production near threshold: single/double distributions and mass determination

Speaker: Lilin Yang

LLYang Top2020.pdf

4:30 PM Study of b-fragmentation and production of strange particles in top-pair events

Speaker: Juan Gonzalez

gonzalez_TOP2020.pdf

5:00 PM NNLO b-fragmentation function in the context of top quark physics and beyond

Speaker: Alex Mitov

AlexanderMitov-b-fragmentation.pdf

5:30 PM BSM top quark interactions: anomalous couplings, FCNC and CPV

Speaker: Mohammad Jawad Kareem

Top2020_mkareem_v3.pdf

Thu, September 17

2:00 PM → 4:00 PM Jets in top physics: substructure, tagging and machine learning

Convener: Seung Lee

2:00 PM Top tagging and machine learning - overview and future prospects

Speaker: Benjamin Nachman

nachman_top_2020.pdf

2:30 PM Machine learning models to generate top events

Speaker: Anja Butter

Top2020_AB.pdf

3:00 PM Uncovering latent jet substructure

Speaker: Jernej Kamenik

kamenik_top_2020.pdf

3:30 PM Reducing uncertainty in top quark mass with machine learning

Speaker: Bryan Ostdiek

Ostdiek_TopMassML_Tops2020.pdf

4:00 PM → 4:30 PM Coffee break

4:30 PM → 6:00 PM Plenary session

Convener: Florencia Canelli

4:30 PM Measurements of asymmetries in top-quark production and tests of lepton universality in ATLAS

Speaker: Nello Bruscino

Top2020.Bruscino.pdf

5:00 PM A global search for new physics in the top sector

Speaker: Susanne Westhoff

top2020-westhoff.pdf

5:30 PM CMS Measurements of EFT parameters with top quarks

Speaker: Nicolas Tonon

TOP2020_Tonon.pdf

Fri, September 18

2:00 PM → 3:00 PM Experimental Joker

Convener: Antonio Onofre

2:00 PM Exp. Joker 2

Speaker: Brent Yates

top2020-byates.pdf

2:30 PM Exp. Joker 3

Speaker: Erich Varnes

Varnes_ATLAS_4top.pdf

3:00 PM → 4:00 PM Measurements in extreme kinematic regimes

Convener: Antonio Onofre

3:00 PM Treatment of top-quark backgrounds in extreme phase spaces

Speaker: Leonid Serkin

ExtremeTops_LSerkin_Top2020_final.pdf

3:30 PM New results from searches with highly boosted top quarks

Speaker: Titas Roy

TOP2020_roy.pdf

4:00 PM → 4:30 PM Coffee break

4:30 PM → 6:00 PM Summary talks

Convener: Francesco Spano

4:30 PM Experimental summary

Speaker: Reinhard Schwienhorst

Exp summary.pdf

5:15 PM Theory summary

Speaker: Sally Dawson

top2020_dawson.pdf