9th Edition of the Large Hadron Collider Physics Conference

Jun 7, 2021, 12:00 PM → Jun 12, 2021, 4:35 PM Europe/Paris

Zoom

Tulika Bose (University of Wisconsin Madison (US)), Dave Charlton (University of Birmingham (GB)), Giovanni Marchiori (APC, IN2P3 and Université de Paris (Paris, France)), Roberto Salerno (Centre National de la Recherche Scientifique (FR))

The Ninth Annual Large Hadron Collider Physics (LHCP2021) conference is planned in Paris online from 7th to 12th June 2021

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NEWS (03/11/2021): the LHCP2021 proceedings have been reviewed and are now available  at this URL: https://pos.sissa.it/397/

NEWS (18/10/2021): the LHCP2021 proceedings are currently under review and will appear at this URL: https://pos.sissa.it/397/

NEWS (12/06/2021): the winners of the poster awards and the site selected to host LHCP 2023 have been announced in the closing plenary session

NEWS (28/04/2021): the second bulletin is now available on the conference website (click here)

NEWS (23/04/2021): poster abstracts have been reviewed and acceptance notifications have been sent by e-mail. Information about the poster and poster session formats are available here. More detailed instructions will be sent to the poster presenters by e-mail.

NEWS (22/04/2021): thanks to CERN and IUPAP sponsorships, no fees are required to participate to the LHCP2021 conference. Participants attending the online conference are required to register in order to receive by e-mail the instructions for the video connections.

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    The LHCP conference series started in 2013 after a successful fusion of two international conferences, "Physics at Large Hadron Collider Conference" and "Hadron Collider Physics Symposium". The conference programme will be devoted to a detailed review of the latest experimental and theoretical results on collider physics, and recent results of the LHC Run II, and discussions on further research directions within the high energy particle physics community including both theory and experiment sides. The main goal of the conference is to provide intense and lively discussions between experimentalists and theorists in research areas such as the Standard Model Physics and Beyond, the Higgs Boson, Supersymmetry, Heavy Quark Physics and Heavy Ion Physics as well as the recent progress in the high luminosity upgrades of the LHC and future colliders developments.

With great regret we have concluded that the 9th LHCP conference, to be held 7-12 June 2021, will need to be fully online, due to the Covid-19 pandemic and its uncertainties.

The conference will be maintained for the same days, with an adjusted timetable to improve remote participation from around the world, similar to that of the 2020 edition of LHCP. 

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MAIN DEADLINES

Registration
- opening	12 December 2020
- closing	2 June 2021
Poster abstract submission
- submission deadline	19 April 2021
- acceptance notification	23 April 2021 at the latest
Start of the conference	7 June 2021 12:00
Proceedings submission	20 September 2021

LCHP2021 posters - Presenter availability.pdf

LHCP2021_1stBulletin.pdf

LHCP2021_2ndBulletin.pdf

LHCP2021_online_poster.pdf

LHCP2021 stats.pdf

Monday, June 7

12:00 PM → 1:25 PM Opening Plenary: Highlights from LHC and Experiments

Conveners: Giovanni Marchiori (APC, IN2P3 and Université de Paris (Paris, France)), Tulika Bose (University of Wisconsin Madison (US))

12:00 PM Welcome from the LOC

Speakers: Giovanni Marchiori (APC, IN2P3 and Université de Paris (Paris, France)), Roberto Salerno (Centre National de la Recherche Scientifique (FR))

LHCP2021_Opening.pdf

Recording

12:05 PM The European Strategy for Particle Physics and CERN's future

Speaker: Fabiola Gianotti (CERN)

LHCP-Gianotti.pdf

LHCP-Gianotti.ppt

Recording

12:35 PM Status of the LHC

Speaker: Mike Lamont (CERN)

LHC-status-LHCP-June21.pdf

Recording

1:00 PM Highlights and perspectives from the ALICE experiment

Speaker: Mateusz Ploskon (Lawrence Berkeley National Lab. (US))

LHCP2021-ALICE-Overview_v2.0.pdf

Recording

1:25 PM → 1:35 PM Coffee break

1:35 PM → 3:05 PM Opening Plenary: Highlights from LHC and Experiments II

Conveners: Bruno Mansoulie (Université Paris-Saclay (FR)), Roberto Salerno (Centre National de la Recherche Scientifique (FR))

1:35 PM Highlights and perspectives from the ATLAS experiment

Speaker: Manuella Vincter (Carleton University (CA))

Recording

talk_LHCP21_Vincter.pdf

2:00 PM Highlights and perspectives from the CMS experiment

Speaker: Gautier Hamel de Monchenault (IRFU, CEA, Université Paris-Saclay (FR))

GHM_LHCP2021_CMS-Highlights.pdf

Recording

2:25 PM Highlights and perspectives from the LHCb experiment

Speaker: Chris Parkes (University of Manchester (GB))

LHCb_LHCP_Parkes_070621.pdf

Recording

2:50 PM Report on Diversity, Inclusion and Outreach activities at LHC

Speaker: Brajesh Choudhary (University of Delhi (IN))

LHCP2021-DIO-Talk-BCC-7June2021.pdf

Recording

3:05 PM → 3:15 PM Coffee break

3:15 PM → 4:45 PM BSM - Feebly Interacting Particles: Neutral FIPs and other current experiments

Conveners: Emma Torro Pastor (Univ. of Valencia and CSIC (ES)), José Francisco Zurita (IFIC - Univ. of Valencia and CSIC (ES)), Niki Saoulidou (National and Kapodistrian University of Athens (GR)), Dr Vasiliki Mitsou (Univ. of Valencia and CSIC (ES)), Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías)

3:15 PM Searches for long-lived particles and Heavy Neutral Leptons: Theory perspective

Speaker: Giovanna Cottin (Universidad Adolfo Ibañez)

LHCPC2021_HNLsLLPs_GCOTTIN.pdf

Recording

3:33 PM Heavy Neutral Lepton searches at the LHC

Speaker: Matthias Komm (CERN)

mkomm_2021_06_06_LHCP.pdf

Recording

3:51 PM Large radius tracking and displaced vertex searches at the LHC

Speaker: Carlos Vazquez Sierra (CERN)

CVS_LLPs_LHCP21_v3.pdf

Recording

4:09 PM Searches for displaced and delayed signatures at the LHC

Speaker: Rachel Christine Rosten (Ohio State University (US))

2021_06_07_LHCP_LLP.pdf

Recording

4:27 PM Searches in current non-LHC experiments

Speaker: Prof. Christopher Hearty (University of British Columbia (CA))

Recording

Search for FIPs at non-LHC experiments 7-Jun-2021.pdf

3:15 PM → 4:45 PM Detector performance: Session 1

Conveners: Francesco Prino (Universita e INFN Torino (IT)), Nicole Skidmore (University of Bonn (DE)), Nora Emilia Pettersson (CERN), Phat Srimanobhas (Chulalongkorn University (TH))

3:15 PM Highlight: ATLAS

Speaker: Davide Cieri (Max-Planck-Institut fur Physik (DE))

2021_06_07_LHCP2021_ATLAS_performance.pdf

Recording

3:33 PM Highlight: CMS-TOTEM

Speaker: Laurent Forthomme (Helsinki Institute of Physics (FI))

lhcp_cmstotem_forthomme.pdf

3:51 PM Highlight: ALICE: reconstruction and TPC calibration in Run 3

Speaker: Ernst Hellbar (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

20210607_ALICETPCRecoCalib.pdf

Recording

4:09 PM HIghlight: LHCb

Speaker: Louis Henry (CERN)

LouisHenry_LHCbTrigger.pdf

Recording

4:27 PM Highlight: Forward Physics (LHCf + FASER)

Speaker: Eugenio Berti (Universita e INFN, Firenze (IT))

EBerti_LHCP2021.pdf

Recording

3:15 PM → 4:45 PM Electroweak physics: VBS/VBF

Conveners: Davide Pagani (Deutsches Elektronen-Synchrotron (DE)), Hang Yin (Central China Normal University CCNU (CN)), Joany Manjarres (Technische Universitaet Dresden (DE)), Dr Pietro Vischia (Universite Catholique de Louvain (UCL) (BE))

3:15 PM VBS/VBF (theory)

Speaker: Dr Alexander Karlberg (University of Oxford)

070621LHCP2021.pdf

Recording

3:42 PM VBS/VBF measurements (without photons) at ATLAS

Speaker: Karolos Potamianos (University of Oxford (GB))

2021-06-07-LHCP-Potamianos.pdf

Recording

4:03 PM VBS/VBF measurements (without photons) at CMS

Speaker: Matteo Presilla (Universita e INFN, Padova (IT))

LHCP2021_VBS_CMS.pdf

Recording

4:24 PM VBS/VBF measurements (with photons) at ATLAS and CMS

Speaker: Ben Harry Smart (Science and Technology Facilities Council STFC (GB))

LHCP2021_ATLAS_CMS_VBS_VBF_ZyWy_photons_Ben_Smart_7_6_21_v2.pdf

3:15 PM → 4:45 PM Higgs physics: Session 1

Conveners: Giuliano Panico (University of Florence and INFN Florence), Kerstin Tackmann (Deutsches Elektronen-Synchrotron (DE)), Meng Xiao (ZJU - Zhejiang University (CN))

3:15 PM Higgs decays to bosons at ATLAS+CMS

Speaker: Sana Ketabchi (University of Toronto (CA))

LHCP21_HtoBosons_vfinal.pdf

Recording

3:37 PM Higgs decays to third-generation fermions at ATLAS+CMS

Speaker: Christina Reissel (ETH Zurich (CH))

Recording

Reissel_LHCP_HiggstoThirdGenFermions_final.pdf

3:59 PM Higgs CP studies at ATLAS+CMS

Speaker: Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

MariaMorenoLlacer_HiggsCP_ATLASandCMS_June2021.pdf

Recording

4:21 PM Rare Higgs decays at ATLAS+CMS

Speaker: Kajari Mazumdar (Tata Inst. of Fundamental Research (IN))

lhcp.pdf

Recording

3:15 PM → 4:45 PM QCD: Jet substructure and correlations in hadronic final States

Conveners: Ben Nachman (Lawrence Berkeley National Lab. (US)), Prof. Frank Petriello (Northwestern University and Argonne National Lab), Gabor Veres (Eotvos Lorand University (HU)), Joe Osborn (Oak Ridge National Laboratory), Laura Brittany Havener (Yale University (US))

3:15 PM Recent progress in jet substructure calculations

Speaker: Daniel Reichelt

LHCP2021_DReichelt.pdf

Recording

3:30 PM Jet Substructure + Correlations in Hadronic Final States from CMS

Speaker: Markus Seidel (University of Maryland (US))

lhcp_mseidel.pdf

Recording

3:45 PM Jet Substructure + Correlations in Hadronic Final States from ATLAS

Speaker: Robin Newhouse (University of British Columbia (CA))

LHCP 2021 - Jet Substructure + Correlations in Hadronic Final States from ATLAS - Robin Newhouse (3).pdf

Recording

4:15 PM Jet Substructure + Correlations in Hadronic Final States from ALICE

Speaker: James Mulligan (University of California, Berkeley (US))

Mulligan_LHCP.pdf

Recording

3:15 PM → 4:45 PM TeV-scale BSM: General BSM

Conveners: Dr Carl Gwilliam (University of Liverpool (GB)), Seema Sharma (Indian Institute of Science Education and Research (IN)), Yael Shadmi (Technion)

3:15 PM ATLAS + CMS searches beyond inclusive resonances in leptonic final states

Speaker: Tadej Novak (Deutsches Elektronen-Synchrotron (DE))

LHCP_searches_leptons_ATLAS+CMS.pdf

Recording

3:33 PM ATLAS + CMS Searches beyond inclusive resonances in hadronic final states

Speaker: Alberto Orso Maria Iorio (Universita e sezione INFN di Napoli (IT))

CMS_Atlas_Beyond_resonant_hadronic_Iorio.pdf

Recording

3:51 PM ATLAS + CMS Searches for Di-/Tri-boson resonances

Speaker: Antonis Agapitos (Peking University (CN))

LHCP_Resonant_Multiboson_Searches_7_6_21_v4.pdf

Recording

4:09 PM Global searches for new physics based on novel event characteristics

Speaker: Cari Cesarotti (Harvard University)

isotropyLHCP2021.pdf

Recording

4:34 PM Discussion

3:15 PM → 4:45 PM Top physics: Top production

Conveners: Gauthier Durieux (CERN), Jose Enrique Palencia Cortezon (Universidad de Oviedo (ES)), Maria Moreno Llacer (Univ. of Valencia and CSIC (ES)), Stephen Farry (University of Liverpool (GB))

Top@LHCP2021.pdf

3:15 PM Theory status of Top Production

Speaker: Anna Kulesza (University of Muenster)

lhcp21_ak.pdf

lhcp21_ak.pptx

Recording

3:33 PM Recent Results in Top Pair Production Measurements at the LHC

Speaker: Michele Faucci Giannelli (INFN e Universita Roma Tor Vergata (IT))

Michele Faucci Giannelli, Top pair production at the LHC.pptx

Recording

3:51 PM Recent Results in Single Top Production at the LHC

Speaker: Galo Rafael Gonzalvo Rodriguez (Univ. of Valencia and CSIC (ES))

LHCP Single Top.pdf

Recording

4:09 PM Associated Top Production at the LHC

Speaker: Barbara Alvarez Gonzalez (Universidad de Oviedo (ES))

LHCP2021_BarbaraAlvarez_final.pdf

Recording

4:27 PM Four Top Production at the LHC

Speaker: Albert Kong (University of Adelaide (AU))

lhcp2021-talk.pdf

Recording

4:45 PM → 5:00 PM Coffee break

5:00 PM → 6:48 PM Heavy ions: Quarkonium, exotics and other bound states

Conveners: Dr Alexander Rothkopf (University of Stavanger), Hengne Li (South China Normal University (CN)), Maximiliano Puccio (CERN), Qipeng Hu (Lawrence Livermore Nat. Laboratory (US)), Wei Li (Rice University (US))

5:00 PM Jets and Quarkonium as open-quantum systems

Speaker: Dr Xiaojun Yao (Massachusetts Institute of Technology)

lhcp.pdf

Recording

5:15 PM New measurements in the quarkonia sector with focus on new discriminatory observables

Speaker: Minjung Kim (Ruprecht Karls Universitaet Heidelberg (DE))

LHCP2021_mjkim_final.pdf

Recording

5:30 PM X(3872) and exotic quarkonia production in heavy-ion

Speaker: Guillaume Falmagne

LHCP 07.06.2021.pdf

Recording

5:45 PM X(3872) and exotic quarkonia production in small systems

Speaker: John Matthew Durham (Los Alamos National Laboratory)

LHCP_Durham.pdf

Recording

6:00 PM (Anti)(Hyper)nuclei production at the LHC

Speaker: Luca Barioglio (Technische Universitaet Muenchen (DE))

LHCP21_Barioglio_v4.pdf

Recording

6:15 PM Loosely bound state production

Speaker: Kfir Blum

LHCP2021 hypertriton.pdf

Recording

5:00 PM → 6:30 PM Joint sessions: BSM and Higgs physics

Conveners: Carl Gwilliam (University of Liverpool (GB)), Kerstin Tackmann (Deutsches Elektronen-Synchrotron (DE)), Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías)

LHC_JointHiggsTop.pdf

5:00 PM BSM Higgs decays at ATLAS+CMS

Speaker: Javier Montejo Berlingen (CERN)

20210607_HBSM_LHCP_v2.pdf

Recording

5:20 PM Exotic Higgs decays (theory)

Speaker: Elina Fuchs (Fermilab and University of Chicago)

5:40 PM H->inv at ATLAS+CMS

Speaker: Andreas Albert (Boston University (US))

2021-06-07_lhcp.pdf

Recording

6:00 PM Searches for additional Higgs bosons at ATLAS+CMS

Speaker: Junquan Tao (Institute of High Energy Physics, Chinese Academy of Sciences (CN))

LHCP2021_AdditionalHiggsAtLHC_JTao.pdf

Recording

6:20 PM Discussion

5:00 PM → 6:45 PM QCD: Nucleon Structure and Soft QCD

Conveners: Ben Nachman (Lawrence Berkeley National Lab. (US)), Frank Petriello (Northwestern University and Argonne National Lab), Gabor Veres (Eotvos Lorand University (HU)), Joe Osborn (Oak Ridge National Laboratory), Laura Brittany Havener (Yale University (US))

5:00 PM Recent theoretical progress in nuclear structure

Speaker: Maria Pia Zurita

LHCP2021_v2.pdf

Recording

5:18 PM Nucleon Structure and Soft QCD from CMS

Speaker: Rajat Gupta (Panjab University (IN))

LHCP2021_SoftQCDCMS_Rajat_v1.pdf

Recording

5:36 PM Nucleon Structure and Soft QCD from ATLAS

Speaker: Andre Sopczak (Czech Technical University in Prague (CZ))

Recording

Sopczak_LHCP2021_final.pdf

5:54 PM Nucleon Structure and Soft QCD from LHCb

Speaker: Agnieszka Oblakowska-Mucha (AGH University of Science and Technology (PL))

Recording

SoftQCD_AMucha_LHCP2022.pdf

6:12 PM Nucleon Structure and Soft QCD from ALICE

Speaker: Sushanta Tripathy (Universita e INFN, Bologna (IT))

Recording

SoftQCD-ALICE-Sushanta.pdf

6:30 PM The first experimental observation of the Odderon

Speaker: Frigyes Janos Nemes (CERN (also at Wigner RCP Budapest, Hungary))

LHCP_2021_Frigyes_Nemes_v2 (3).pdf

Recording

5:00 PM → 6:31 PM Tools: Theory tools

Conveners: Andy Buckley (University of Glasgow (GB)), Loukas Gouskos (CERN), Philip Ilten (University of Cincinnati (US)), Sandro Christian Wenzel (CERN), Stefano Carrazza (CERN)

5:00 PM High precision calculations

Speaker: Tobias Neumann (Brookhaven National Laboratory)

Neumann_Tobias_LHCP2021.pdf

Recording

5:18 PM Lattice developments and tools

Speaker: Huey-Wen Lin

Lattice developments and tools

Recording

5:36 PM Event generation techniques and tools

Speaker: Marek Schoenherr (University of Durham (GB))

MarekSchoenherr_MCCompChallenges.pdf

Recording

5:54 PM BSM develoments and tools

Speaker: Dr Tomas Gonzalo (Monash University)

Recording

TomasGonzaloLHCP2021.pdf

6:12 PM Discussion

5:00 PM → 6:31 PM Top physics: Interpretations in final state states with top quark

Conveners: Gauthier Durieux (CERN), Jose Enrique Palencia Cortezon (Universidad de Oviedo (ES)), Maria Moreno Llacer (Univ. of Valencia and CSIC (ES)), Stephen Farry (University of Liverpool (GB))

Top@LHCP2021.pdf

5:00 PM Bayesian inference and unsupervised ML @ Four-tops

Speaker: Ezequiel Alvarez de los Alvarez de San Luis

Corner-plot for Bayesian Inference algorithm 500fb-1

Ezequiel_Alvarez_lhcep2021.pdf

Recording

5:18 PM BSM reach of single top-quark measurements

Speaker: Dr Alberto Tonero (Carleton University)

Recording

slides.pdf

5:36 PM BSM searches with top final states

Speaker: Junpei Maeda (Kobe University (JP))

BSMwTop_LHCP_2021-06-07_final.pdf

Recording

5:54 PM EFT Results from ATLAS

Speaker: Laura Barranco Navarro (Stockholm University (SE))

LHCPBarranco.pdf

Recording

6:12 PM EFT Results from CMS

Speaker: Juan Gonzalez (Universidad de Oviedo (ES))

LHCP2021_Jgonzalez.pdf

5:00 PM → 6:31 PM Upgrades: Physics at HL-LHC

Conveners: Christian Ohm (KTH Royal Institute of Technology (SE)), LianTao Wang (University of Chicago), Magnus Mager (CERN), Saptaparna Bhattacharya (Northwestern University (US)), Silvia Borghi (University of Manchester (GB))

LHCPInstructions.pdf

5:00 PM Physics prospects ALICE in Run 5 and beyond

Speaker: Antonio Uras (Centre National de la Recherche Scientifique (FR))

Alice3_LCHP2021_Uras.pdf

Recording

5:18 PM Physics with precision timing at HL-LHC with ATLAS and CMS

Speaker: Christian Ohm (KTH Royal Institute of Technology (SE))

Ohm_HGTD_LHCP2021.pdf

Recording

5:36 PM Boosting the physics potential of the HL-LHC ATLAS and CMS experiments with new trigger systems

Speaker: Swagata Mukherjee (Rheinisch Westfaelische Tech. Hoch. (DE))

LHCP2021_SM.pdf

Recording

5:54 PM Physics prospects for LHCb upgrade II

Speaker: Francesca Dordei (INFN, Cagliari (IT))

Recording

upgrade_II.pdf

6:12 PM Testing BSM physics at the HL-LHC

Speaker: stefania gori (UC Santa Cruz)

Recording

TalkLHCp.pdf

Tuesday, June 8

12:00 PM → 2:00 PM Plenary I: Top Physics

Conveners: Benjamin Fuks (Centre National de la Recherche Scientifique (FR)), Klaus Monig (Deutsches Elektronen-Synchrotron (DE))

12:00 PM Theoretical aspects of top physics

Speaker: Malgorzata Maria Worek (Rheinisch Westfaelische Tech. Hoch. (DE))

Recording

TopPhysics-MWorek.pdf

12:30 PM Results on tt+X production

Speaker: Joshuha Thomas-Wilsker (Chinese Academy of Sciences)

Recording

Results_on_ttX_Production_JTW.pdf

1:00 PM Top production and decay

Speaker: Sven Menke (Max-Planck-Institut fur Physik (DE))

lhcp2021.pdf

Recording

1:30 PM Rare production and decay processes

Speaker: Carlo Alberto Gottardo (NIKHEF, Radboud University (Nijmegen))

RareTop_Gottardo_LHCP2021.pdf

Recording

2:00 PM → 2:15 PM Coffee break

2:15 PM → 3:45 PM BSM - Feebly Interacting Particles: Dark Photons and ALPs; Future experiments

Conveners: Emma Torro Pastor (Univ. of Valencia and CSIC (ES)), José Francisco Zurita, Niki Saoulidou (National and Kapodistrian University of Athens (GR)), Vasiliki Mitsou (Univ. of Valencia and CSIC (ES)), Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías)

2:15 PM Theoretical overview of ALPs and Dark Photons

Speaker: Patrick Foldenauer

lhcp21_foldenauer.pdf

Recording

2:33 PM Searches for ALPs at the LHC

Speaker: Kristof Schmieden (Johannes Gutenberg Universitaet Mainz (DE))

2021-06_LHCP_ALPsAtLHC.pdf

Recording

2:51 PM Searches for Dark Photons at the LHC

Speaker: Federico Leo Redi (EPFL - Ecole Polytechnique Federale Lausanne (CH))

LHCP_DP_CINCO_Redi_2021_v1.0.pdf

Recording

3:09 PM Status of FASER and MAPP

Speaker: Candan Dozen (Tsinghua University (CN))

LHCP2021_FASER(nu)_MAPP_SND.pdf

Recording

3:27 PM Future LLP experiments

Speaker: Heather Russell (CERN)

20210608_hrussell_LHCP.pdf

Recording

2:15 PM → 3:45 PM Electroweak physics: Diboson/multiboson

Conveners: Davide Pagani (Deutsches Elektronen-Synchrotron (DE)), Hang Yin (Central China Normal University CCNU (CN)), Joany Manjarres (Technische Universitaet Dresden (DE)), Pietro Vischia (Universite Catholique de Louvain (UCL) (BE))

2:15 PM Polarized multiboson production at the LHC and beyond

Speaker: Richard Ruiz (Institute of Nuclear Physics (IFJ) PAN)

Recording

rruiz_LHCP2021_MuliVPolar.pdf

2:33 PM Multiboson measurements (not photon-induced) at ATLAS

Speaker: Sabine Wedam Lammers (Indiana University (US))

Multiboson_LHCP.pdf

Recording

2:51 PM Multiboson measurements (not photon-induced) at CMS

Speaker: Alicia Calderon Tazon (Universidad de Cantabria and CSIC (ES))

Multibosons_CMS_LHCP2021_v2.pdf

Recording

3:09 PM Photon-induced processes [theory]

Speaker: Marta Luszczak (University of Rzeszow)

Luszczak-M-LHCP2021.pdf

Recording

3:27 PM Photon-induced processes at ATLAS and CMS

Speaker: Christophe Royon (The University of Kansas (US))

lhcp2021.pdf

Recording

2:15 PM → 3:45 PM Flavour physics: Session 1

Conveners: Diego Guadagnoli (LAPTh Annecy), Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Michel De Cian (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Sarah Porteboeuf (Université Clermont Auvergne (FR)), Semen Turchikhin (Joint Institute for Nuclear Research (RU))

2:15 PM Theory lessons from flavour data

Speaker: Claudia Cornella (U. Zurich)

LHCp_Cornella.pdf

Recording

2:33 PM SM challenges

Speaker: Javier Virto (Universitat de Barcelona)

Recording

TALK___Theory_Challenges_in_exclusive_rare_B_decays__LHCP2021_.pdf

2:51 PM Rare decays in b→s/d sector

Speaker: Yanting Fan (University of Chinese Academy of Sciences (CN))

LHCP2021_rareb2sd.pdf

Recording

3:09 PM b → c status and prospects with focus on ratio observables

Speaker: Alessandra Gioventu (Universidade de Santiago de Compostela (ES))

LHCP_b2c_Gioventu_v4.pdf

Recording

3:27 PM Bs → mumu status and prospects

Speaker: Jacco Andreas De Vries (Universiteit Maastricht (NL))

jacco_LHCP-bsmumu_080621_v6.pdf

Recording

2:15 PM → 3:45 PM Higgs physics: Session 2

Conveners: Giuliano Panico (University of Florence and INFN Florence), Kerstin Tackmann (Deutsches Elektronen-Synchrotron (DE)), Meng Xiao (ZJU - Zhejiang University (CN))

2:15 PM Higgs combination at ATLAS+CMS

Speaker: Haider Abidi (Brookhaven National Laboratory (US))

HiggsCombination.pdf

Recording

2:37 PM Higgs EFT benchmarks -- CANCELLED

2:59 PM HH nonresonant and self-coupling at ATLAS+CMS

Speaker: Laura Pereira Sanchez (Stockholm University (SE))

LauraPereira_HH_LHCP.pdf

Recording

3:21 PM HH production in a global EFT Higgs fit

Speaker: Ramona Groeber (Università di Padova and INFN, Sezione di Padova)

LHCP21_ramona.pdf

Recording

2:15 PM → 3:45 PM Joint sessions: Heavy ions and QCD

LHC_JointHiggsTop.pdf

2:15 PM Nuclear parton distribution functions

Speaker: Cynthia Keppel (Jefferson Lab)

~$LHCP2021_Keppel.pptx

2:33 PM New results on the modification of jet structure in Heavy Ion collisions

Speaker: Helena Santos (LIP - Lisbon)

LHCP2021_HSantos.pdf

Recording

2:51 PM Nuclear shadowing and heavy ion UPCs at the LHC

Speaker: Vadim Guzey (NRC Kurchatov Institute PNPI (RU))

guzey_LHCP_2021.pdf

Recording

3:09 PM New measurements on Photon-Photon interactions

Speaker: Ruchi Chudasama (Tata Inst. of Fundamental Research (IN))

LHCP_photon_photon_ruchi.pdf

Recording

3:27 PM New measurements on diffractive vector mesons

Speaker: Simone Ragoni (University of Birmingham (GB))

LHCP2021.pdf

Recording

2:15 PM → 3:45 PM Joint sessions: Upgrades and performance

Conveners: Christian Ohm (KTH Royal Institute of Technology (SE)), Nicole Skidmore (University of Bonn (DE)), Nora Emilia Pettersson (CERN), Saptaparna Bhattacharya (Northwestern University (US))

LHC_JointHiggsTop.pdf

2:15 PM Improvements for reconstruction of physics objects with HL-LHC detector upgrades for ATLAS and CMS

Speaker: Adriano Di Florio (Universita e INFN, Bari (IT))

LHCP_Reco_Adriano.pdf

Recording

2:33 PM Use of hardware acceleration for online event reconstruction for Run 3 and later

Speaker: Marten Ole Schmidt (Ruprecht Karls Universitaet Heidelberg (DE))

HardwareAccelerationOnlineReco_final.pdf

Recording

2:51 PM Status and prospects for technical solutions for real-time analysis for Run-3 and later

Speaker: Miguel Ramos Pernas (University of Warwick (GB))

Miguel_Ramos_Pernas_LHCP2021.pdf

Recording

3:09 PM Particle identification and tracking with timing detectors in ALICE and LHCb in Run 5

Speaker: Stefania Bufalino (Politecnico di Torino (IT))

LHCP2021_Bufalino.pdf

Recording

3:27 PM HL-LHC Computing Challenges - how can the physics performance be maintained?

Speaker: Vincent Pascuzzi (Lawrence Berkeley National Lab. (US))

Google Slides

Recording

2:15 PM → 3:45 PM TeV-scale BSM: SUSY

Conveners: Carl Gwilliam (University of Liverpool (GB)), Seema Sharma (Indian Institute of Science Education and Research (IN)), Yael Shadmi (Technion)

2:15 PM ATLAS + CMS Searches for squarks and gluinos

Speaker: Stefio Yosse Andrean (Stockholm University (SE))

LHCP2021_gluino_squark_Yosse.pdf

Recording

2:33 PM ATLAS + CMS Searches for EWK SUSY in hadronic and semi-leptonic final states

Speaker: Stefan Guindon (CERN)

LHCP_EWKSUSY_Guindon.pdf

Recording

2:51 PM ATLAS + CMS Searches for EWK SUSY in fully leptonic and soft final states

Speaker: Christian Herwig (Fermi National Accelerator Lab. (US))

herwig_v1.pdf

Recording

3:09 PM The current state of SUSY and ways forward

Speaker: Matthew Reece (Harvard University)

Recording

Reece_LHCP_SUSY_2021.pdf

3:34 PM Discussions

3:45 PM → 4:00 PM Coffee break

4:00 PM → 6:30 PM Plenary II: Beyond the Standard Model - TeV scale

Conveners: Andrea Wulzer (CERN and EPFL), Marc Besancon (cea-saclay/dapnia/spp)

4:00 PM Searches for supersymmetry

Speaker: Elodie Deborah Resseguie (Lawrence Berkeley National Lab. (US))

LHCP2021_SUSY_er.pdf

Recording

4:30 PM Searches for exotica

Speaker: Halil Saka (University of Cyprus (CY))

ExoticSearches_LHCP_HS.pdf

Recording

5:00 PM New ideas for TeV-scale model building

Speaker: Veronica Sanz Gonzalez

LHCP21.pdf

Recording

5:30 PM SMEFT and searches for new physics

Speaker: Alex Pomarol (Universitat Autonoma de Barcelona & IFAE)

LHCP 21.pdf

Recording

6:00 PM Dark Matter: overview of collider-based and direct / indirect searches

Speaker: Deborah Pinna (University of Wisconsin Madison (US))

DarkMatter_LHC_LHCP_DP.pdf

Recording

Wednesday, June 9

12:00 PM → 1:30 PM Plenary III: Electroweak Physics

Conveners: Andrew Pilkington (University Of Manchester), Radja Boughezal (Argonne National Laboratory)

12:00 PM Low energy probes of the electroweak sector

Speaker: Michael Ramsey-Musolf (Shanghai Jiao Tong University)

MJRM LHCP EW 21.pdf

Recording

12:22 PM EWK precision measurements

Speaker: Ilya Gorbunov (Joint Institute for Nuclear Research (RU))

GorbunovLHCP21.pdf

Recording

12:44 PM Multiboson measurements

Speaker: Antonio Giannini (Universita e sezione INFN di Napoli (IT))

LHCPConference_AGiannini_Jun21.pdf

Recording

1:06 PM VBF and VBS measurements

Speaker: Roberto Covarelli (University/INFN Torino (IT))

LHCP21_vbs.pdf

Recording

1:30 PM → 1:45 PM Coffee break

1:45 PM → 3:15 PM Joint sessions: Flavour physics and QCD

LHC_JointHiggsTop.pdf

1:45 PM Heavy-flavour hadron production

Speaker: Mattia Faggin (Universita e INFN, Padova (IT))

mfaggin_LHCp2021_HFprod_final.pdf

Recording

2:03 PM Heavy Flavour production in MC

Speaker: Stefan Hoeche (Fermilab)

paris_21-06.pdf

Recording

2:21 PM Experimental measurement of Heavy Flavours and jets

Speaker: Meena Meena (Panjab University (IN))

Meena_LHCP2021_heavy_flavor_jets.pdf

Recording

2:39 PM Theoretical view on Heavy Flavours and jets

Speaker: Maria Ubiali (University of Cambridge)

LHCp_Ubiali.pdf

Recording

2:57 PM New measurements in the quarkonia sector

Speaker: Valeriia Zhovkovska (Université Paris-Saclay (FR))

20210609_LHCP_Quarkonium_Zhovkovska.pdf

Recording

1:45 PM → 3:15 PM Joint sessions: Higgs and top physics

Conveners: Maria Moreno Llacer (Univ. of Valencia and CSIC (ES)), Meng Xiao (ZJU - Zhejiang University (CN))

LHC_JointHiggsTop.pdf

1:45 PM ttX calculations and modeling

Speaker: Andrea Ferroglia (New York City College of Technology CUNY)

LHCP_21_Ferroglia.pdf

Recording

2:07 PM ttX results from ATLAS+CMS

Speaker: Peter Johannes Falke (University of Bonn (DE))

Recording

ttX_at_ATLAS_and_CMS_PeterFalke.pdf

2:29 PM ttH results from ATLAS+CMS

Speaker: Dr Djamel Eddine Boumediene (Université Clermont Auvergne (FR))

Recording

ttH-ATLAS-CMS-LHCP2021.pdf

2:51 PM Determination of kappatop from ttbar, 4top, ...

Speaker: Emanuele Usai (Brown University (US))

LHCP21Usai 3.pdf

Recording

1:45 PM → 3:15 PM Joint sessions: Joint BSM session

Conveners: Niki Saoulidou (National and Kapodistrian University of Athens (GR)), Seema Sharma (Indian Institute of Science Education and Research (IN))

LHC_JointHiggsTop.pdf

1:45 PM Dark Matter at colliders: theory

Speaker: Victor Martin-Lozano (DESY)

DM-theory-VMLozano.pdf

Recording

2:03 PM Search for high mass mediators in ATLAS and CMS

Speaker: Claudio Quaranta (Sapienza Universita e INFN, Roma I (IT))

Recording

Search for high mass mediators in ATLAS and CMS.pdf

2:21 PM Search for low mass mediators in ATLAS and CMS

Speaker: Silvio Donato (Universita & INFN Pisa (IT))

lowMassResonance_Donato.pdf

Recording

2:39 PM Mono-jet, Mono-V searches in ATLAS and CMS

Speaker: Varun Sharma (University of Wisconsin Madison (US))

2021-06-LHCP2021.pdf

Recording

2:57 PM Mono-Higgs, Mono-top searches in ATLAS and CMS

Speaker: Mariana Toscani (Universidad de Buenos Aires (AR))

mono-H_mono-top_in_BSM_searches_v5.pdf

Recording

1:45 PM → 3:15 PM Outreach and diversity: Session 1

Conveners: Benoit Blossier (CNRS/Laboratoire de Physique Théorique d'Orsay), Federica Baldassari (CERN), Federico Leo Redi (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Federico Ronchetti (INFN e Laboratori Nazionali di Frascati (IT)), Dr Kate Shaw (University of Sussex (GB))

1:45 PM LHC and outreach

Speaker: Violaine Bellee (Universitaet Zuerich (CH))

2021_06_09_LHCPOutreach_Bellee.pdf

Recording

2:01 PM LHC and diversity

Speaker: Adriana Telesca (CERN)

20210609_AT_LHCP2021_v12.pdf

Recording

2:17 PM LHC experiments and their Open Data

Speaker: Edgar Fernando Carrera Jarrin (Universidad San Francisco de Quito (EC))

LHCExpOpenData_ECarrera_LHCP2021.pdf

Recording

2:33 PM The IPPOG Resource Database: Making particle physics outreach & education available worldwide

Speaker: Barbora Bruant Gulejova (Universitaet Bern (CH))

IPPOG_RDB_LHCP_2021_BBG_final.pdf

IPPOG_RDB_LHCP_2021_BBG_final.pptx

Recording

2:49 PM A beamline for schools

Speaker: Margherita Boselli (CERN)

Beamline_for_Schools.pdf

Recording

1:45 PM → 3:15 PM Tools: Experimental tools

Conveners: Andy Buckley (University of Glasgow (GB)), Loukas Gouskos (CERN), Philip Ilten (University of Cincinnati (US)), Sandro Christian Wenzel (CERN), Stefano Carrazza (CERN)

1:45 PM Advances in detector simulation tools

Speaker: Samuel Louis Bein (Hamburg University (DE))

LHCp2021_LhcSimulationRandDb.pdf

Recording

2:03 PM Deep learning approaches in analysis

Speaker: Lukas Alexander Heinrich (CERN)

LHCP_DeepLearning.pdf

Recording

2:21 PM GPUs in trigger and reconstruction algorithms

Speaker: Thomas Boettcher (University of Cincinnati (US))

boettcher_LHCP_9June2021_v5.pdf

Recording

2:39 PM Advances in experimental analysis frameworks

Speaker: Jan Fiete Grosse-Oetringhaus (CERN)

Recording

v8.pdf

2:57 PM Discussion

1:45 PM → 3:15 PM Upgrades: Detectors at HL-LHC

Conveners: Christian Ohm (KTH Royal Institute of Technology (SE)), LianTao Wang (University of Chicago), Magnus Mager (CERN), Saptaparna Bhattacharya (Northwestern University (US)), Silvia Borghi (University of Manchester (GB))

LHCPInstructions.pdf

1:45 PM Novel detector concepts for ALICE for Run 4 and beyond

Speaker: Giacomo Contin (Universita e INFN Trieste (IT))

LHCP_ALICE_Novel_Detectors_Contin.pdf

Recording

2:03 PM Status and progress on the ATLAS Phase-II detector upgrades

Speaker: Oleg Solovyanov (Institute for High Energy Physics of NRC Kurchatov Institute (RU))

Recording

Solovyanov_LHCP2021.pdf

2:21 PM Status and progress on the CMS Phase-II detector upgrades

Speaker: Nadja Strobbe (University of Minnesota (US))

LHCP2021_CMS_PhaseII_Strobbe.pdf

Recording

2:39 PM Status and progress for LHCb Upgrade-II detector

Speaker: Silvia Gambetta (The University of Edinburgh (GB))

LHCb_UpgradeII_LHCP_sg.pdf

Recording

2:57 PM Results from commissioning and/or prototypes for new small (HL-)LHC experiments

Speaker: Friedemann Neuhaus (Johannes Gutenberg Universitaet Mainz (DE))

fneuhaus_lhcp.pdf

Recording

3:15 PM → 3:30 PM Coffee break

3:30 PM → 5:00 PM BSM - Feebly Interacting Particles: Unconventional signatures

Conveners: Emma Torro Pastor (Univ. of Valencia and CSIC (ES)), José Francisco Zurita, Niki Saoulidou (National and Kapodistrian University of Athens (GR)), Vasiliki Mitsou (Univ. of Valencia and CSIC (ES)), Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías)

3:30 PM Theoretical overview of Dark Showers

Speaker: Elias Bernreuther (RWTH Aachen University)

lhcp_darkshowers.pdf

Recording

3:45 PM Searches for Dark Showers at the LHC

Speaker: Aran Garcia-Bellido (University of Rochester (US))

AGB_DarkShowers_LHCP21.pdf

Recording

4:00 PM Searches for Disappearing Tracks, HSCPs and Stopped Particles at the LHC

Speaker: Emma Sian Kuwertz (University of Bristol)

FIP_SPDT_LHCP2021.pdf

Recording

4:15 PM Searches for Anomalous Ionizing Particles, SIMPs, and Monopoles at the LHC

Speaker: Claudia Wulz (Austrian Academy of Sciences (AT))

Wulz_LHCP_June2021.pdf

Wulz_LHCP_June2021.pptx

4:30 PM Status of MoEDAL and milliQan experiments

Speaker: Michael Staelens

LHCP2021 Presentation - MoEDAL & milliQan v3 .pdf

Recording

4:45 PM Round table discussion

3:30 PM → 5:00 PM Flavour physics: Session 2

Conveners: Diego Guadagnoli (LAPTh Annecy), Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Michel De Cian (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Sarah Porteboeuf (Université Clermont Auvergne (FR)), Semen Turchikhin (Joint Institute for Nuclear Research (RU))

3:30 PM CP violation in charm with the LHCb experiment

Speaker: Serena Maccolini (Universita e INFN, Bologna (IT))

Recording

SMaccolini_LHCP21_CPV_in_charm.pdf

3:48 PM CP violation in beauty with the LHCb experiment

Speaker: Alessandro Bertolin (Universita e INFN, Padova (IT))

bertolinLHCP2021.pdf

bertolinLHCP2021.pptx

Recording

4:06 PM CP violation with the ATLAS and CMS experiments

Speaker: Adam Edward Barton (Lancaster University (GB))

CMSATLAS_CPV_results.pdf

Recording

4:24 PM Theory Overview of CP violation in the Charm sector

Speaker: Yuval Grossman (Cornell)

LHCp-2021.pdf

Recording

4:42 PM CKM Metrology theory

Speaker: Stefan Schacht (University of Manchester)

lhcp-2021-schacht.pdf

Recording

3:30 PM → 5:00 PM Heavy ions: Collectivity of soft and heavy flavour

Conveners: Alexander Rothkopf (University of Stavanger), Hengne Li (South China Normal University (CN)), Maximiliano Puccio (CERN), Qipeng Hu (Lawrence Livermore Nat. Laboratory (US)), Wei Li (Rice University (US))

3:30 PM Origin of collectivity in QCD systems

Speaker: Giuliano Giacalone (Université Paris-Saclay)

Recording

talk.pdf

3:45 PM Collectivity of soft probes in small systems

Speaker: Tomasz Bold (AGH Univ. of Science and Technology, Krakow (PL))

2021-06-lhcp-soft-collectivity.pdf

Recording

4:00 PM Heavy flavor collectivity in small systems

Speaker: Dr Georgios Krintiras (The University of Kansas (US))

Flow_small_systems.pdf

Recording

4:15 PM Collectivity of soft probes in heavy ion collisions

Speaker: Vytautas Vislavicius (University of Copenhagen (DK))

Recording

Vislavicius_LHCP21.pdf

4:30 PM Heavy flavor collectivity in heavy ion collisions

Speaker: Fabrizio Grosa (CERN)

LHCP2021_HFcollectivity_fgrosa.pdf

Recording

4:45 PM Collectivity in UPC

Speaker: Peter Alan Steinberg (Brookhaven National Laboratory (US))

Recording

Steinberg_LHCP2021_v1.pdf

3:30 PM → 5:00 PM Joint sessions: EFT interpretations

LHC_JointHiggsTop.pdf

3:30 PM Theory aspects in global analyses

Speaker: Eleni Vryonidou (University of Manchester (GB))

LHCP2021.pdf

Recording

3:50 PM EFT computations

Speaker: Ilaria Brivio (University of Heidelberg)

Recording

slides_LHCP_2021.pdf

4:10 PM Experimental EFT results

Speaker: Nicolas Morange (Université Paris-Saclay (FR))

EFT_ATLAS-CMS.pdf

Recording

4:30 PM Open questions from the LHC EFT WG

Speaker: Admir Greljo (Universitaet Bern (CH))

LHCP-EFT.pdf

Recording

4:50 PM Discussion

Recording

3:30 PM → 5:00 PM Outreach and diversity: Session 2

Conveners: Benoit Blossier (CNRS/Laboratoire de Physique Théorique d'Orsay), Federica Baldassari (CERN), Federico Leo Redi (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Federico Ronchetti (INFN e Laboratori Nazionali di Frascati (IT)), Kate Shaw (University of Sussex (GB))

3:30 PM Arts and science in Italy: from high-schools to CERN

Speaker: Dr Pierluigi Paolucci (Universita e INFN of Napoli (IT))

LHCP 2021 Pierluigi Paolucci.pptx

Recording

3:50 PM EEE (Extreme Energy Events)

Speaker: Dr Silvia Pisano (INFN e Laboratori Nazionali di Frascati (IT))

outreach_EEE_LHCP21.pdf

Recording

4:10 PM Astronomy for all: a reality even for people with disabilities

Speaker: Ludovic Petitdemange

Astronomy for all - LP.pdf

Recording

4:30 PM ResearchAbility: do we really need a more inclusive environment in research?

Speaker: Gian Maria Greco (Marie Curie Alumni Association & University of Warsaw)

GMGreco_MCAA_RA_LHCP2021.pdf

Recording

3:30 PM → 5:00 PM Tools: Other tools

Conveners: Andy Buckley (University of Glasgow (GB)), Loukas Gouskos (CERN), Philip Ilten (University of Cincinnati (US)), Sandro Christian Wenzel (CERN), Stefano Carrazza (CERN)

3:30 PM Advances in software management tools

Speaker: Jakob Blomer (CERN)

software-lhcp21.pdf

3:48 PM ML and advances in Data Quality Monitoring

Speaker: Suzanne Klaver (Nikhef National institute for subatomic physics (NL))

LHCP_SuzanneKlaver_v2.pdf

4:06 PM Quantum Information Science in HEP

Speaker: Dr Jean-Roch Vlimant (California Institute of Technology (US))

vlimant_LHCP-QIS_June21.pdf

4:24 PM Advances in Analysis tools/ecosystem

Speaker: Oksana Shadura (University of Nebraska Lincoln (US))

Advances in Analysis tools/ecosystem

LHCP_AS.pdf

4:42 PM Discussion

3:30 PM → 5:00 PM Upgrades: Future colliders

Conveners: Christian Ohm (KTH Royal Institute of Technology (SE)), LianTao Wang (University of Chicago), Magnus Mager (CERN), Saptaparna Bhattacharya (Northwestern University (US)), Silvia Borghi (University of Manchester (GB))

LHCPInstructions.pdf

3:30 PM Prospects for future colliders and advanced accelerator technologies

Speaker: Akira Yamamoto (High Energy Accelerator Research Organization (JP))

LHCP2021-ay-210609a.pdf

Recording

3:48 PM Requirements, emerging technologies, and challenges for detectors at future accelerators

Speaker: Didier Claude Contardo (Centre National de la Recherche Scientifique (FR))

LHCP_DC_09062021.pdf

LHCP_DC_09062021.pptx

Recording

4:06 PM The BSM Physics Case for Future Hadron Colliders

Speaker: Matthew Reece (Harvard University)

Recording

Reece_LHCP_FutureColliders_2021.pdf

4:24 PM Towards a multi-TeV Muon Collider

Speaker: Nadia Pastrone (Universita e INFN Torino (IT))

LHCP_NPastrone_MuonCollider_9jun21.pdf

4:42 PM Physics at future lepton colliders

Speaker: Matthew Philip Mccullough (CERN)

LHCP.pdf

5:00 PM → 5:15 PM Coffee break

5:15 PM → 6:45 PM Plenary IV: Beyond the Standard Model - feebly interacting particles

Conveners: Laura Patrizii (Universita e INFN, Bologna (IT)), Wolfgang Adam (HEPHY-Vienna)

5:15 PM FIPs: phenomenology overview and new ideas

Speaker: Gilad Perez (Weizmann)

Gilad_Perez_LHCP21.pdf

Recording

5:37 PM Searching for Charged FIPs and HIPS (Monopoles, Dyons, etc) at the LHC and Beyond

Speaker: James Pinfold (University of Alberta (CA))

FIP abd HIPs LHCP 2021.pdf

Recording

5:59 PM Searching for neutral FIPs at LHC and beyond

Speaker: Lawrence Lee Jr (Harvard University (US))

060921_LLee_NeutralFIPs.pdf

Recording

6:21 PM Cosmology constraints on Dark Sector models for colliders

Speaker: GOUDELIS Andreas (LPC - Clermont Ferrand)

AndreasLHCP2021.pdf

Recording

Thursday, June 10

12:00 PM → 2:00 PM Plenary V: Flavour Physics

Conveners: Marie-Helene Schune (Université Paris-Saclay (FR)), Sebastien Descotes-Genon (Laboratoire de Physique Théorique d'Orsay)

12:00 PM Heavy flavour - theory

Speaker: Andreas Crivellin (Universitaet Zuerich (CH))

LHCP2021.pdf

LHCP2021.pptx

Recording

12:24 PM Heavy flavour results from non-LHC experiments

Speaker: Justine Serrano (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)

LHCP2021_justine.pdf

Recording

12:48 PM B-hadrons: CPV and semileptonic decays

Speaker: Basem Khanji (Technische Universitaet Dortmund (DE))

LHCP_2021_BKhanji.pdf

Recording

1:12 PM Rare decays

Speaker: Alessio Boletti (LIP, Lisboa (PT))

RareDecays_LHCP2021_Boletti.pdf

Recording

1:36 PM Heavy flavour production and spectroscopy

Speaker: Jibo He (University of Chinese Academy of Sciences (CN))

20210610_HFPS.pdf

Recording

2:00 PM → 2:15 PM Coffee break

2:15 PM → 3:45 PM Detector performance: Session 2

Conveners: Francesco Prino (Universita e INFN Torino (IT)), Nicole Skidmore (University of Bonn (DE)), Nora Emilia Pettersson (CERN), Phat Srimanobhas (Chulalongkorn University (TH))

2:15 PM Tracking in ATLAS and CMS

Speaker: Mia Tosi (Università degli Studi di Padova & INFN)

210607_LHCP2021_miatosi_tracking.pdf

Recording

2:33 PM Flavour-tagging / Jet / Met performance in ATLAS and CMS

Speaker: Jonathan Bossio (CERN)

JonaBossio_LHCP21.pdf

Recording

2:51 PM ALICE: new inner tracker commissioning and impact on vertexing in Run 3

Speaker: Ivan Ravasenga (Nikhef National institute for subatomic physics (NL))

LHC2021_iravasen_v5.pdf

Recording

3:09 PM LHCb: tracking and flavour-tagging and PID

Speaker: Vitalii Lisovskyi (Technische Universitaet Dortmund (DE))

LHCP2021_latest.pdf

Recording

3:27 PM Round table discussion

Recording

2:15 PM → 3:45 PM Electroweak physics: Precision

Conveners: Davide Pagani (Deutsches Elektronen-Synchrotron (DE)), Hang Yin (Central China Normal University CCNU (CN)), Joany Manjarres (Technische Universitaet Dresden (DE)), Pietro Vischia (Universite Catholique de Louvain (UCL) (BE))

2:15 PM Precision measurements, W mass, sinθw (theory)

Speaker: Ayres Freitas (University of Pittsburgh)

lhcp21_freitas.pdf

Recording

2:33 PM W mass and angular coefficients measurements ATLAS-CMS-LHCb

Speaker: Martina Pili (University of Oxford (GB))

Pili_LHCP_V4.pdf

Recording

2:51 PM Rare decay search ATLAS+CMS

Speaker: Riccardo Salvatico (The University of Kansas (US))

RareDecays_LHCP.pdf

Recording

3:09 PM Discussion

Recording

2:15 PM → 3:45 PM Flavour physics: Session 3

Conveners: Diego Guadagnoli (LAPTh Annecy), Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Michel De Cian (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Sarah Porteboeuf (Université Clermont Auvergne (FR)), Semen Turchikhin (Joint Institute for Nuclear Research (RU))

2:15 PM Classical spectroscopy

Speaker: Valentina Mariani (Universita e INFN, Perugia (IT))

Flavours_LHCP .pdf

Recording

2:33 PM Tetra- and pentaquark "spectroscopy"

Speaker: Elisabetta Spadaro Norella (Università degli Studi e INFN Milano (IT))

LHCP21_Spadaro.pdf

Recording

2:51 PM Recent Belle2 results and projections

Speaker: Frank Meier (Duke University)

LHCP_FlavorPhysicsAtBelle2.pdf

Recording

3:09 PM [CANCELLED] LQCD calculations for flavour phenomenology: highlights and prospects

Speaker: Antoine Gérardin (U. Aix-Marseille)

3:27 PM Round Table

Recording

2:15 PM → 3:45 PM Higgs physics: Session 3

Conveners: Giuliano Panico (University of Florence and INFN Florence), Kerstin Tackmann (Deutsches Elektronen-Synchrotron (DE)), Meng Xiao (ZJU - Zhejiang University (CN))

2:15 PM Fiducial and differential measurements at ATLAS+CMS

Speaker: Roberto Seidita (Universita e INFN, Firenze (IT))

Higgs_fiducial_and_differential_measurements_at_ATLAS_and_CMS_final.pdf

Recording

2:37 PM Precision computations for Higgs production

Speaker: Johannes Michel (MIT CTP)

LHCP_Johannes_Michel_2021_06_10.pdf

Recording

2:59 PM High-pT Higgs production

Speaker: Raoul Horst Rontsch (CERN)

LHCP2021_roentsch.pdf

Recording

3:21 PM Discussion

LHCP2021_HiggsDiscussion.pdf

Recording

2:15 PM → 3:45 PM QCD: Precision Measurements

Conveners: Ben Nachman (Lawrence Berkeley National Lab. (US)), Frank Petriello (Northwestern University and Argonne National Lab), Gabor Veres (Eotvos Lorand University (HU)), Joe Osborn (Oak Ridge National Laboratory), Laura Brittany Havener (Yale University (US))

2:15 PM Recent progress on high order calculations and matching to parton showers

Speaker: Emanuele Re (Unite Reseaux du CNRS (FR))

2021_06_09.pdf

Recording

2:33 PM Precision QCD Measurements from CMS

Speaker: Salim Cerci (Adiyaman University (TR) - Istanbul University (TR))

LHCP2021_Salim_Cerci.pdf

Recording

2:51 PM Precision QCD Measurements from ATLAS

Speaker: Tibor Zenis (Comenius University (SK))

Recording

Zenis_Precision_QCD_Measurements_from_ATLAS.pdf

3:09 PM Precision QCD Measurements from LHCb

Speaker: Marcin Kucharczyk (Polish Academy of Sciences (PL))

LHCP_2021_Kucharczyk_v2.pdf

Recording

3:27 PM Precision QCD Measurements from ALICE

Speaker: Dimitar Lubomirov Mihaylov (Technische Universitaet Muenchen (DE))

Mihaylov_LHCP2021.pdf

Recording

2:15 PM → 3:45 PM TeV-scale BSM: Third generation and flavour

Conveners: Carl Gwilliam (University of Liverpool (GB)), Seema Sharma (Indian Institute of Science Education and Research (IN)), Yael Shadmi (Technion)

2:15 PM ATLAS + CMS searches for third generation SUSY particles

Speaker: Daniel Spitzbart (Boston University (US))

LHCP_2021_3rd_gen.pdf

Recording

2:30 PM ATLAS + CMS searches for leptoquarks

Speaker: Edson Carquin Lopez (Federico Santa Maria Technical University (CL))

ECarquinTalkFinal.pdf

Recording

2:45 PM ATLAS + CMS searches for vector-like quarks

Speaker: Timothy Robert Andeen (University of Texas at Austin (US))

AndeenLHCP_vFinal.pdf

Recording

3:00 PM Flavour tagging for enhancing sensitivity to new physics

Speaker: Yotam Soreq (Technion- Israel Institute of Technology (IL))

2021_06_LHCP_2021.pdf

Recording

3:20 PM Discussion

2:15 PM → 3:45 PM Top physics: Top mass and properties

Conveners: Gauthier Durieux (CERN), Jose Enrique Palencia Cortezon (Universidad de Oviedo (ES)), Maria Moreno Llacer (Univ. of Valencia and CSIC (ES)), Stephen Farry (University of Liverpool (GB))

Top@LHCP2021.pdf

2:15 PM Top Properties and Asymmetry measurements at the LHC

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

21-06-10_LHCP.pdf

Recording

2:33 PM Top Measurement Highlights at CMS

Speaker: Mintu Kumar (Tata Inst. of Fundamental Research (IN))

Recording

Single_top_highlights_LHCP Talk_by_Mintu_kumar.pdf

Single_top_highlights_LHCP Talk_by_Mintu_kumar.pptx

2:51 PM Top Measurement Highlights at ATLAS

Speaker: Stefan Richter (DESY)

Recording

StefanRichter_LHCP2021.pdf

3:09 PM Theory status of top properties

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

AlexanderMitov-LHCP-2021.pdf

AlexanderMitov-LHCP-2021.pptx

3:27 PM General Discussion

Recording

3:45 PM → 4:00 PM Coffee break

4:00 PM → 6:30 PM Plenary VI: Higgs Physics

Conveners: Jeonghyeon Song (Konkuk University), Rosy Nikolaidou (Université Paris-Saclay (FR))

4:00 PM Probing the SMEFT using the electroweak sector

Speaker: Shankha Banerjee (CERN)

LHCP_Banerjee.pdf

Recording

4:30 PM Higgs physics - experimental talk

Speaker: Pierluigi Bortignon (INFN Padova (IT) and Universita di Cagliari)

202106-lhcp-higgs-experimential-bortignon-final.pdf

Recording

5:00 PM Rare and BSM Higgs decays

Speaker: Imma Riu (IFAE Barcelona (ES))

Rare-BSM-HiggsDecays-LHCP-2021.pdf

Recording

5:30 PM Precision calculations of Higgs boson properties

Speaker: Bernhard Mistlberger (SLAC National Accelerator Laboratory (US))

Mistlberger_LHCP21.pdf

Recording

6:00 PM Constraints on BSM from the Higgs sector

Speaker: Jorge de Blas (Universidad de Granada (ES))

BSM_Higgs_deBlas_LHCP21.pdf

Recording

6:45 PM → 7:45 PM Poster Session

6:45 PM $\rm \Omega_{c}^{0}$ production cross section in pp collisions at $\sqrt{s}=$ 13 TeV with ALICE

Recent measurements of charm-baryon production at midrapidity by the ALICE collaboration in pp collisions show baryon-over-meson ratios significantly higher than those in $\rm e^+e^-$ collisions for different charm-hadron species. The charmed baryon-to-meson and charmed baryon-to-baryon ratios provide unique information on hadronisation mechanisms. In this poster, the first measurement of production cross section of $\rm \Omega_{c}^{0}$ via the hadronic decay channel $\rm \Omega_{c}^{0} \rightarrow \pi^{+} \Omega^{-}$ (and its charge conjugate) in $2

Speaker: Jianhui Zhu (Central China Normal University CCNU (CN))

20210610_LHCP_Jianhui_v6.pdf

Zoom meeting room

6:45 PM $\rm{\Lambda^{+}_{c}}$ cross section in pp and p--Pb collisions down to $p_{\rm T}$ = 0 at $\sqrt{s_{\rm NN}}$ = 5.02 TeV measured with ALICE

The production cross sections of open heavy-flavour hadrons are typically described within the factorisation approach as the convolution of the parton distribution functions of the incoming protons, the perturbative QCD partonic cross section, and the fragmentation functions. These last are typically parametrised from measurements in ${\rm e^+e^-}$ collisions. Measurements of charm-baryon production are crucial to study the charm quark hadronisation in pp and p--Pb collisions and its difference with respect to ${\rm e^+e^-}$ collisions. Furthermore, measurements of charm-baryon production in p--Pb collisions provide important information about Cold Nuclear Matter (CNM) effects quantified in the nuclear modification factor $R_{\rm pPb}$. Measurements in p--Pb collisions also help us to understand how the possible presence of collective effects could modify the production of heavy-flavour hadrons and to find similarities among pp, p--Pb and Pb--Pb systems.
In this poster, the latest measurements of $\Lambda^+_{\rm c}$ performed with the ALICE detector at midrapidity in pp, and the new measurement performed down to $p_{\rm T}=0$ in p--Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV are presented. This allows us to show the first ALICE measurement of $\Lambda^+_{\rm c}/{\rm D^0}$ and $\Lambda^+_{\rm c}$ $R_{\rm pPb}$ down to $p_{\rm T}$ = 0 in p--Pb collisions. The $\Lambda^+_{\rm c}/{\rm D^0}$ ratio at midrapidity in small systems is significantly higher than the one in ${\rm e^+e^-}$ collisions, suggesting that the fragmentation of charm is not universal across different collision systems. Results are compared with theoretical calculations.

Speaker: Annalena Sophie Kalteyer (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

LcTopKs0_lowpT_Kalteyer_LHCP2021.pdf

Zoom meeting room

6:45 PM A High-Granularity Timing Detector for the ATLAS Phase-II upgrade

The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to
L ~ 7.5 × 10$^{34}$ cm$^{-2}$s$^{-1}$ will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected. A High Granularity Timing Detector (HGTD) will be installed in front of the LAr end-cap calorimeters for pile-up mitigation and luminosity measurement.
The HGTD is a novel detector introduced to augment the new all-silicon Inner Tracker in the pseudo-rapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. Two silicon-sensor double-sided layers will provide precision timing information for minimum-ionising particles with a resolution as good as 30 ps per track in order to assign each particle to the correct vertex. Readout cells have a size of 1.3 mm × 1.3 mm, leading to a highly granular detector with 3.7 million channels. Low Gain Avalanche Detectors (LGAD) technology has been chosen as it provides enough gain to reach the large signal over noise ratio needed.
The requirements and overall specifications of the HGTD will be presented as well as the technical design and the project status. The on-going R&D effort carried out to study the sensors, the readout ASIC, and the other components, supported by laboratory and test beam results, will also be presented.

Speaker: Asmaa Aboulhorma (Universite Mohammed V (MA))

LHCP-poster.pdf

LHCP-Slides.pdf

Zoom meeting room

6:45 PM A Search for Lepton-Flavour-Violating Z->etau and Z->mutau Decays with the ATLAS Experiment

In the Standard Model (SM), lepton flavour is conserved in all interactions.
Hence, any observation of lepton flavour violation (LFV) would be an
unambiguous sign of physics beyond the SM (BSM), and LFV processes are
predicted by numerous BSM models.
One way to search for LFV is in the decay of gauge bosons.
In the search presented here, the decay of the Z boson to an electron-tau or
muon-tau pair is investigated using the full Run 2 pp collision data set at
sqrt(s) of 13TeV recorded by the ATLAS experiment at the LHC.
The analysis exploits tau decays into hadrons and - for the first time in this
channel in ATLAS - into leptons.
A key ingredient of the search is the usage of a neural net to differentiate
between signal and background events in order to make optimum use of the data.
Combined with about 8 billion Z decays recorded by ATLAS in Run 2 of the LHC,
the strongest constraints to date are set with Br(Z->etau)<5.0e-6 and
Br(Z->mutau)<6.5e-6 at 95% confidence level
- finally superseding the limits set by the LEP experiments more than two
decades ago.

Speaker: Ann-Kathrin Perrevoort (Nikhef National institute for subatomic physics (NL))

LHCP_Perrevoort_2021.pdf

Poster video explanation

Zoom meeting room

6:45 PM AFP Performance in the Low Pile-up Runs

Since 2016 ATLAS detector is equipped with new devices - ATLAS Forward Proton (AFP) detectors. AFP aims to measure protons scattered at very small angles, which are a natural signature of so-called diffractive events. Measurement of properties of diffractive events usually require low pile-up data-taking conditions. AFP performance in such special, low pile-up runs, including evaluation of detector efficiency, will be presented.

Speaker: Maciej Piotr Lewicki (Polish Academy of Sciences (PL))

LHCP2021.pdf

Zoom meeting room

6:45 PM Analysis of b-jets production in p–Pb and pp collisions at √sNN = 5.02 TeV with ALICE

Production of beauty quarks takes place mostly in initial hard scattering processes and can be calculated using perturbative quantum chromodynamics (pQCD). Thanks to excellent particle tracking capabilities, the ALICE experiment at the LHC is able to reconstruct beauty-hadron decay vertices, displaced hundreds of micrometers from the primary interaction vertex. The poster will present inclusive pT spectra of b jets measured in p–Pb and pp collisions at √sNN = 5.02 TeV, the corresponding nuclear modification factor, and the fraction of b jets among inclusive jets. The production cross-section of b jets was measured down to 10 GeV/c which is lower than in previous measurements of b jets done at the LHC. Low pT b-jets are expected to be more sensitive to cold nuclear matter effects in p–Pb collisions. They are an important reference for future Pb–Pb measurements, where their production provides information on color and parton mass dependence of parton energy loss.

Speaker: Artem Isakov (Czech Academy of Sciences (CZ))

aisakov_alice_bjets.pdf

Video

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6:45 PM Angular correlations of heavy-flavour decay electrons and charged particles in pp and p-Pb collisions $\sqrt{s_{\rm NN}}=$ 5.02 TeV with ALICE at LHC.

Heavy quarks (charm, beauty), due to the large masses, mainly originate via hard partonic scattering processes in high-energy hadronic collisions. They evolve as parton showers and hadronize as back-to-back jet events.

Two particles azimuthal angular correlations triggered by electrons from heavy-flavour hadron decays can be used for heavy-flavor jet studies. Such correlation distributions contains a near-side peak around $\Delta\varphi = 0$ formed by particles associated with a high-$p_{\rm T}$ trigger particle, and an away-side peak around $\Delta\varphi = \pi$. By changing the momentum scales of the trigger and associated particles one can study the heavy-flavour jet structure. In pp collisions, heavy-flavour correlations can be used to study the production and fragmentation of heavy-quarks. In p-Pb collisions, heavy-flavour correlations can be used to test cold nuclear matter and gluon saturation effects.

In this poster, we present the current status and results of the ALICE measurement of azimuthal angular correlations of high-$p_{\rm T}$ heavy-flavour decay electrons with charged particles in pp and p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV from the LHC Run 2 data. The results from pp and p-Pb collisions will be compared with each other to investigate any modification due to cold nuclear matter effect.

Speaker: Ravindra Singh (Indian Institute of Technology Indore (IN))

Angular correlations of heavy-flavour decay electrons and charged particles in pp collision at √s = 5.02 TeV with ALICE at LHC(1).pdf

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6:45 PM Apparent modification of the jet-like yield in high multiplicity proton-proton collisions

In this work we present the production of charged particles associated with high-$p_{\rm T}$ trigger particles ($8<\textit{p}_{\rm T}^{\rm trig.}<15$ GeV/$c$) at midrapidity in proton-proton collisions at $\sqrt{s}=5.02$,TeV simulated with the PYTHIA 8 Monte Carlo model [1]. The study is performed as a function of the relative transverse activity classifier, $R_{\rm T}$, which is the relative charged-particle multiplicity in the transverse region ($\pi/3< \phi^{\rm trig.}-\phi^{\rm assoc.}|<2\pi/3$) of the di-hadron correlations, and it is sensitive to the Multi-Parton Interactions. The evolution of the yield of associated particles on both the towards and the away regions ($3\leq p_{\rm T}^{\rm assoc.}< 8$ GeV/$c$) as a function of $R_{\rm T}$ is investigated. We propose a strategy which allows for the modelling and subtraction of the Underlying Event (UE) contribution from the towards and the away regions in challenging environments like those characterised by large $R_{\rm T}$. We found that the signal in the away region becomes broader with increasing $R_{\rm T}$. Contrarily, the yield increases with $R_{\rm T}$ in the towards region. This effect is reminiscent of that seen in heavy-ion collisions, where an enhancement of the yield in the towards region for 0-5% central Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}=2.76$,TeV was reported. To further understand the role of the UE and additional jet activity, the transverse region is divided into two one-sided sectors, "trans-max" and "trans-min" selected in each event according to which region has larger or smaller charged particle multiplicity. Based on this selection criterium, the observables are studied as a function of $R_{\rm T}^{\rm max}$ and $R_{\rm T}^{\rm min}$, respectively. Results for pp collisions simulated with PYTHIA 8.244 and Herwing 7.2 will be shown.

[1] J.Phys.G 48 (2020) 1, 015007

Speaker: Gyula Bencedi (Universidad Nacional Autonoma (MX))

Bencedi_LHCP2021.pdf

Zoom meeting room

6:45 PM ATLAS LAr Calorimeter Commissioning for LHC Run-3

Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic and forward calorimetry in the region from |η| = 1.5 to |η| = 4.9. In the first LHC run a total luminosity of 27 fb$^{−1}$ has been collected at center-of-mass energies of 7-8 TeV. After detector consolidation during a long shutdown, Run-2 started in 2015 and about 150 fb$^{-1}$ of data at a center-of-mass energy of 13 TeV was recorded. With the end of Run-2 in 2018 a multi-year shutdown for the Phase-I detector upgrades was begun.
As part of the Phase-I upgrade, new trigger readout electronics of the ATLAS Liquid-Argon Calorimeter have been developed. Installation began at the start of the LHC shut down in 2019 and is expected to be completed in 2020. A commissioning campaign is underway in order to realize the capabilities of the new, higher granularity and higher precision level-1 trigger hardware in Run-3 data taking. This contribution will give an overview of the new trigger readout commissioning, as well as the preparations for Run-3 detector operation and changes in the monitoring and data quality procedures to cope with the increased pileup.

Speaker: Marcos Vinicius Silva Oliveira (CERN)

ATLAS LAr Calorimeter Commissioning for LHC Run-3 - LHCP2021 - Marcos Oliveira.pdf

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6:45 PM ATLAS searches extra dimensions for using the full Run 2 ee and mumu datasets

This poster summarises the extra dimensional models being searched for using the ATLAS detector at the Large Hadron Collider, in the full Run 2 dielectron and dimuon datasets. This data was produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. In particular, the limits on the ADD model are presented, from a reinterpretation of the ATLAS Run 2 dilepton non-resonant analysis. Also highlighted, is a novel search being performed for clockwork extra dimensions.

Speaker: Tracey Berry (University of London (GB))

LHCPPosterADDBerry.pdf

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6:45 PM Charm is better than beauty: searching for the Higgs coupling to charm quarks

Eight years ago, the discovery of a new fundamental particle, the Higgs boson (H), was announced by the ATLAS and CMS collaborations at CERN. While elementary particles acquire their mass through their interaction with the Higgs field, the large differences in their masses as well as the origin of the three generations of fermions remain unexplained to this day and constitute the Standard Model flavour puzzle.
Measuring the coupling of each fermion to the Higgs boson is one of the most important tasks in modern particle physics. The next most promising candidate in the quark sector is the decay to a pair of charm quark and antiquark (cc).
This poster will focus on the analysis of the associated production of the Higgs boson with a W or Z boson performed by the ATLAS Collaboration using data collected between 2015 and 2018, and will describe the analysis strategy employed to search for the H→cc signal. More precisely, recent achievements in the charm tagging technology that enables the identification of jets containing charm hadrons will be presented. Our current understanding of the H→cc process will be outlined, and the various results of the ATLAS, CMS and LHCb collaborations will be compared. Finally, the interpretation of this new result as a probe to the Standard Model flavour puzzle and its large constraining power on new physics scenarios will be discussed.

Speaker: Marko Stamenkovic (Nikhef National institute for subatomic physics (NL))

LHCP_Poster_MarkoStamenkovic.pdf

LHCP_slides_MarkoStamenkovic.pdf

Video explanation

Zoom meeting room

6:45 PM CMS RPC activities during LS2 and Commissioning

The second LHC long shutdown period (LS2) was a crucial opportunity for the CMS Resistive Plate Chambers (RPC) to complete their consolidation and upgrade projects. The consolidation includes detector maintenance for gas tightness, HV (high voltage), LV (low voltage) and slow control operation. Dedicated studies were performed to understand the behaviour of RPC currents with comparison to RUN2. This paper summarises the activities performed and commissioning of CMS RPC on the surface (For RE4) and for full detector in CMS cavern in different operating conditions.

Speaker: Mapse Barroso Ferreira Filho (Universidade do Estado do Rio de Janeiro (BR))

Poster CMS RPC activities during LS2 and Commissioning - LHCP_2021.pdf

Zoom room link

6:45 PM Colour and logarithmic accuracy in final-state parton showers

Standard dipole parton showers are known to yield incorrect subleading-colour contributions to the leading (double) logarithmic terms for a variety of observables. In this work, concentrating on final-state showers, we present two simple, computationally efficient prescriptions to correct this problem, exploiting a Lund-diagram type classification of emission regions. We study the resulting effective multiple-emission matrix elements generated by the shower, and discuss their impact on subleading colour contributions to leading and next-to-leading logarithms (NLL) for a range of observables. In particular we show that the new schemes give the correct full colour NLL terms for global observables and multiplicities. Subleading colour issues remain at NLL (single logarithms) for non-global observables, though one of our two schemes reproduces the correct full-colour matrix-element for any number of energy-ordered commensurate-angle pairs of emissions. While we carry out our tests within the PanScales shower framework, the schemes are sufficiently simple that it should be straightforward to implement them also in other shower frameworks.

Speaker: Rok Medves (University of Oxford)

Colour Poster Medves LHCP2021

Poster video explanation

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6:45 PM Combined Constraints on First Generation Leptoquarks

We present a combined analysis of low energy precision constraints and LHC searches for leptoquarks which couple to first generation fermions. Considering all ten leptoquark representations, five scalar and five vector ones, we study at the precision frontier the constraints from $K\to\pi\nu\nu$, $K\to\pi e^+e^-$, $K^0-\bar K^0$ and $D^0-\bar D^0$ mixing, as well as from experiments searching for parity violation (APV and QWEAK). We include LHC searches for $s$-channel single resonant production, pair production and Drell-Yan-like signatures of leptoquarks. Particular emphasis is placed on the recent CMS analysis of lepton flavour universality violation in non-resonant di-lepton pairs. The excess in electron events could be explained by $t$-channel contributions of the leptoquark representations $\tilde{S}_1, S_2, S_3, \tilde{V}_1, V_2 (\kappa_2^{RL} \neq 0)$ and $V_3$ without violating other bounds. Regarding the so-called ``Cabibbo angle anomaly'', we observe that the present constraints are too restrictive to allow for a resolution via direct leptoquark contributions to super-allowed beta decays.

Speaker: Luc Schnell

Link to Zoom room

Poster (Landscape).pdf

Slides.pdf

Video Explanation.mp4

6:45 PM Constraining the Dark Sector with the Mono-jet signature with the ATLAS detector at the LHC

Several Dark Sector models predict the existence of particles with macroscopic life-times and semi-visible jets (QCD-like jets which include stable Dark Sector particles). These can lead to final states with large missing transverse momentum recoiling against at least one highly energetic jet, a signature that is often referred to as a mono-jet.
The RECAST framework is used to re-interpret the recent ATLAS mono-jet search, based on 139 $\mathrm{fb^{-1}}$ of pp collisions collision data at $\sqrt{s} = 13$ TeV, in terms of Dark Sector models not studied in the original work. Complementary results for models involving long-lived particles are found with respect to dedicated searches. Results are also interpreted for the first time at ATLAS in terms of searches for semi-visible jets produced from a QCD-like parton shower.

Speaker: Elena Pompa Pacchi (Sapienza Universita e INFN, Roma I (IT))

ConstrainingTheDarkSector_LHCP2021.pdf

Video Explanation

Zoom room link

6:45 PM Convolutional Neural Networks for event classification

In this study, a new technique for event classification using Convolutional Neural Networks (CNN) is presented. Results obtained using this technique are shown and compared to more traditional Machine Learning approaches for two different physics cases.
The new technique explores the power of visual recognition, which is one of the fastest-growing areas in Artificial Intelligence, as a consequence of the “deep learning” evolution of CNNs. Since CNNs are fed with images, an original and intuitive way for encoding the event information in images has been developed, building a one-to-one correspondence that allows us to face the event classification as an image classification.
In order to take advantage of the good performance of existing CNN architectures, transfer learning has been tested, showing to be a suitable option. VGG16 has been chosen as the benchmark, which is based on the well-known architecture named AlexNet. Additionally, an alternative approach with a simpler CNN architecture has shown to give also good results when trained from scratch. Nevertheless, a comparison with a more standard technique such as a BDT (using the XGBoost library) is provided in order to confirm that the results obtained with this unexplored technique are satisfactory.
The two classifications studied correspond to current challenges in Particle Physics. First, a New Physics example corresponding to a Dark Matter search has been performed, considering a mono-top signal and several of its main background processes. The selected events were required to have exactly one lepton and at least one b-tagged jet, together with large missing transverse momentum. Second, with the same selection criteria, a tt+X classification is also carried out, in which exotic processes with four top quarks as final state are tried to be identified among other processes such as ttH or ttW.

Speaker: Adrian Rubio Jimenez (Univ. of Valencia and CSIC (ES))

Adrian_LHCP_poster_2021.pdf

ADRIAN_LHCP_poster_video.mp4

Adrian_LHCP_slides_format_poster.pdf

Zoom meeting room

6:45 PM Correlation between initial spatial anisotropy and final momentum anisotropies in relativistic heavy ion collisions

The momentum anisotropy ($v_{n}$) of the produced particles in relativistic nuclear collisions is considered to be a response of the initial geometry or the spatial anisotropy ($\varepsilon_{n}$) of the system formed in these collisions. The linear correlation between $\varepsilon_{n}$ and $v_{n}$ measures the efficiency at which the initial spatial eccentricity is converted to final momentum anisotropy in heavy ion collisions. We have studied the transverse momentum, collision centrality, and beam energy dependence of this correlation for different charged particles using a hydrodynamical model framework MUSIC. The ($\varepsilon_{n}$ − $v_{n}$) correlation is found to be stronger for central collisions and also for n=2 compared to that for n=3 as expected. However, the transverse momentum ($p_{T}$) dependent correlation coefficient shows interesting behaviour which strongly depends on the mass as well as $p_{T}$ of the produced particles. The correlation strength is found to be larger for lighter particles in the lower $p_{T}$ region. We have seen that the relative fluctuation in anisotropic flow depends strongly in the value of $\eta/s$ specially in the region $p_{T}<$ 1 GeV unlike the correlation coefficient which does not show significant dependence on $\eta/s$

Speaker: Sanchari Thakur (Department of Atomic Energy (IN))

LHCP2021_sanchari_poster.pdf

sanchari_poster_LHCP.mp4

Zoom meeting room

6:45 PM Cosmics muon validation and electronics performance of the New Small Wheel MicroMegas sectors for ATLAS Muon Upgrade

The ATLAS Muon Upgrade project is a part of the Large Hadron Collider (LHC) - High Luminosity (HL) upgrade project which aims to increase its instantaneous luminosity up to 7.5X10$^{34}$ cm$^{−2}$s$^{−1}$. The present first muon station in the forward regions of ATLAS is being replace by the so-called New Small Wheels (NSWs). The NSWs consist of resistive-strip MicroMegas (MM) detectors and small-strip Thin Gap chambers (sTGC), both providing trigger and tracking capabilities, for a total active surface of more than 2500 m$^2$. After the R&D, design and prototyping phase, series production of MM and sTGC chambers are being constructed. The NSW Upgrade project, the most challenging and complex one of the ATLAS phase-I upgrade projects, is expected to be completed with the installation of NSW in the ATLAS Underground cavern during the summer of 2021. The whole NSW structure includes 128 detectors, in total to ∼2.4 million readout channels. This new generation of readout electronics are built to stand the harsh radiation hostile conditions, where the expected background rate will reach 20 kHz/cm$^2$. Eight micromegas detectors layers are integrated into a double wedge. The mechanical integration is followed by the electronic integration and its initial validation into the data acquisition system. Each fully equipped MicroMegas doublewedge is tested at a dedicated cosmic ray facility and the high voltage settings are defined. Then, a sequence of tests follows, related to efficiency maesurement , cluster size, resolution for all the individual layers of the double wedge are performed. These steps consist the qualification of the MicroMegas sector for the final integration with the sTGC wedges before mounting them on the NSW structure. The electronics performance and cosmic rays validation results of the final validation
of Micromegas double wedges will be presented.

Speaker: Maria Perganti (National Technical Univ. of Athens (GR))

Perganti_LHCP_2021_poster.pdf

Zoom meeting room

6:45 PM CP-violating observables and top-pair production at LHC.

We study new physics contributions to CP-violating anomalous couplings of top-quark in the context of top-pair production and their consequent decays into a pair of dilepton and b-jets at the Large Hadron Collider. An estimate of sensitivities to such CP-violating interactions would also be discussed for the pre-existing 13 TeV LHC data and its projections for the proposed LHC run at 14 TeV.

Speaker: Ms Apurba Tiwari (Aligarh Muslim University)

LHCP2021_poster.pdf

Zoom meeting room

6:45 PM Deep Neural Network resizing for real-time applications in High Energy Physics

Next-generation collider experiments will have to cope with extremely high collision rates, making it necessary to implement real-time event processing capabilities. Among the standard pattern recognition algorithms thought to be run on Look-Up Tables, Machine Learning methods, and in particular Deep Neural Networks, are spreading very fast and there is growing interest in executing such algorithms at trigger level to improve on-line selection performance. The main issue in running these algorithms in real-time is the amount of operation that needs to be computed. Low-latency hardware solutions exist, e.g. FPGAs, but the main constraint to the implementation is often related to the size of the model, that has to be finely tuned not to exceed the available memory. We present an approach to reduce in an optimized way the size of models based on Fully Connected Neural Networks, having under control the model performances. The number of features in input to the Deep Neural Network is reduced using a CancelOut layer, optimized through an original loss function. We compare the performances of this approach with other techniques. We use as baseline study the selection of proton-proton collision events in which the boosted Higgs boson decays to two $b$-quarks and both the decay products are contained in a large and massive jet. These events have to be selected against an overwhelming QCD background. Promising results are shown and the way for future developments is outlined.

Speaker: Mr Andrea Di Luca (Universita degli Studi di Trento and INFN (IT))

Deep Neural Network resizing for real-time applications in High Energy Physics-lhcp2021_poster.pdf

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6:45 PM Development of a L1 tau trigger algorithm using the CMS high-granularity calorimeter information

The High-Luminosity LHC will open an unprecedented window on the weak-scale nature of the universe, providing high-precision measurements of the Standard Model (SM) as well as searches for new physics beyond the SM. The CMS Collaboration is planning to replace entirely its trigger and data acquisition systems to match this ambitious physics program. Efficiently collecting datasets in Phase 2 will be a challenging task, given the harsh environment of 200 proton-proton interactions per LHC bunch crossing. The already challenging implementation of an efficient tau lepton trigger will become, in this conditions, an even crucial and harder task; especially interesting will be the case of hadronically decaying taus. To this end, the foreseen high-granularity endcap calorimeter (HGCAL), and the astonishing amount of information it will provide, play a key role in the design of the new online level-1 (L1) triggering system. In this talk I will present the development of a L1 trigger for hadronically decaying taus based on the sole information from the HGCAL detector. I will present some novel ideas for a L1 trigger based on machine learning that can be implemented in FPGA firmware. The expected performance of the new trigger algorithm will be presented, based on simulated collision data of the HL-LHC.

Speaker: Mr Jona Motta (Centre National de la Recherche Scientifique (FR))

L1TauTrg_poster.pdf

L1TauTrg_slides.pdf

video.mov

video.mp4

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6:45 PM Development of DAQ to DCS communication in the ATLAS Inner Tracker

The increase of luminosity foreseen for the High-Luminosity LHC phase requires the substitution of the ATLAS Inner Detector with a new tracking detector, called Inner Tracker. It will be an all-silicon system consisting of a pixel and a strip subdetector. The ATLAS wide FELIX system will be the off-detector interface to the Inner Tracker.
In order to efficiently bring the Inner Tracker into operation, the intercommunication between the DAQ and the DCS is foreseen. Such communication is mediated by OPC servers that interface to the different hardware and software resources and to the Finite State Machine, which supervises all subdetectors. This framework is designed to be flexible, so that it can easily incorporate heterogeneous resources coming from different subsystems, including the FELIX setups.
This poster describes the current status of the implementation of OPC servers for the intercommunication between the DAQ and the DCS and their integration in the FELIX setups.

Speaker: Alessandra Palazzo (INFN Lecce e Universita del Salento (IT))

DAQtoDCSCommunicationITk.pdf

Poster video explanation

Zoom room

6:45 PM Development of the ATLAS Liquid Argon Calorimeter Readout Electronics for the HL-LHC

To meet new TDAQ buffering requirements and withstand the high expected radiation doses at the high-luminosity LHC, the ATLAS Liquid Argon Calorimeter readout electronics will be upgraded. The triangular calorimeter signals are amplified and shaped by analogue electronics over a dynamic range of 16 bits, with low noise and excellent linearity. Developments of low-power preamplifiers and shapers to meet these requirements are ongoing in 130nm CMOS technology. In order to digitize the analogue signals on two gains after shaping, a radiation-hard, low-power 40 MHz 14-bit ADCs is developed using a pipeline+SAR architecture in 65 nm CMOS. Characterization of the prototypes of the frontend components show good promise to fulfill all the requirements. The signals will be sent at 40 MHz to the off-detector electronics, where FPGAs connected through high-speed links will perform energy and time reconstruction through the application of corrections and digital filtering. Reduced data are sent with low latency to the first level trigger, while the full data are buffered until the reception of trigger accept signals. The data-processing, control and timing functions will be realized by dedicated boards connected through ATCA crates. Results of tests of prototypes of front-end components will be presented, along with design studies on the performance of the off-detector readout system.

Speaker: Mesut Unal (University of Texas at Austin (US))

Unal-ATL-COM-PHYS-2021-309.2.pdf

Video_Explanation

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6:45 PM Development of the Configuration, Calibration and Monitoring System of the New Small Wheel Electronics for the ATLAS experiment

A series of upgrades are planned for the LHC accelerator to increase it's instantaneous luminosity to 7.5×10$^{34}$ cm$^{-2}$s$^{-1}$. The luminosity increase drastically impacts the ATLAS trigger and readout data rates. The present ATLAS Small Wheel Muon detector will be replaced with a New Small Wheel (NSW) detector which is expected to be installed in the ATLAS underground cavern by the end of the Long Shutdown 2 of the LHC. One crucial part of the integration procedure concerns the installation, testing and validation of the on-detector electronics and readout chain for a very large system with a more than 2.1 M electronic channels in total. These include 7K Front-End Boards (MMFE8, SFEB, PFEB), custom printed circuit boards each one housing eight 64-channel VMM Application Specific Integrated Circuits (ASICs) that interface with the ATLAS Trigger and Data Acquisition (TDAQ) system through 1K data-driver cards. The readout chain is based on optical link technology (GigaBit Transceiver links) connecting the backend to the front-end electronics via the Front-End LInk eXchange (FELIX), is a newly developed system that will serve as the next generation readout driver for ATLAS. For the configuration, calibration and monitoring path, the various electronics boards are supplied with the GBT-SCA ASIC (Giga-Bit Transceiver-Slow Control Adapter) which is part of the Gigabit Transceiver Link(GBT) chipset and it's purpose is to distribute control and monitoring signals to the electronics embedded in the detectors and in the ATLAS service areas. Experience and performance results from the first large-scale electronics integration tests performed at CERN on final NSW sectors will be presented.

Speaker: Polyneikis Tzanis (National Technical Univ. of Athens (GR))

tzanis_poster_lhcp_2021.pdf

Zoom Room

6:45 PM Differential cross section measurements of the tW process at CMS

Single top quark production is the subleading production process of top quarks at the LHC after the top quark pair production. The latest differential measurements of single top quark production (tW) cross sections are presented using data collected by the CMS detector at a center-of-mass energy of 13 TeV. The cross sections are measured as a function of various kinematic observables of the top quarks and the jets and leptons of the events in the final state. The results are confronted with precise theory calculations.

Speaker: Mr Victor Rodriguez Bouza (Universidad de Oviedo - ICTEA (ES))

2021-06_lhcp_tWdiffposter.pdf

Zoom meeting room

6:45 PM Event-Level Anomaly Detection for Multijet BSM Searches with Probabilistic Autoencoders

Although most of Beyond Standard Model (BSM) searches are targeting specific theory models, there has always been a keen interest in the development of model-independent methods amongst the High Energy Physics(HEP) community. Machine Learning (ML) based anomaly detection stands among the latest up-and-coming avenues for creating model-agnostic BSM searches. The focus of this research is the design of anomalous event taggers based on autoencoder models. Alongside the signal discrimination power, a high priority is placed on both signal-model and background-model independence. To this end, the autoencoder is used in conjunction with a Normalizing Flow model tasked with latent space density estimation. Both event reconstruction error and latent representation likelihood are combined in order to mitigate the bias of the resulting event anomaly score. Overall this method is showing promising anomaly detection performance without loosing much in terms of generalization power. On the multijet LHC Olympics data, it is consistently able to identify BSM signals, even in the challenging scenarios posed by the Black Box datasets, where the signal content is unknown.

Speaker: Ioan-Mihail Dinu (Horia Hulubei National Institute of Physics and Nuclear Enginee)

DINU_LHCP2021_landscape.pdf

DINU_LHCP2021.pdf

Zoom Meeting Room

6:45 PM Evidence for four-top-quark production in the multilepton final state in proton-proton collisions at sqrt(s)=13 TeV with the ATLAS detector

A search is presented for four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139/fb. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be 24 +7 -6 fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 4.3 (2.4) standard deviations and provides evidence for this process.

Speaker: Albert Kong (University of Adelaide (AU))

lhcp2021-poster.pdf

Zoom meeting room

6:45 PM Extension of Glauber-like model for Proton-Proton collisions using anisotropic and inhomogeneous density profile

The formation of partonic medium in the relativistics heavy-ion collisions is always marked by the values of the ratio of certain observables assuming $p+p$ collisions as a reference. But recent studies of small systems formed in $p+p$ collisions at the LHC energies hint towards the possibility of production of medium with collective behaviour. Results from $p+p$ collisions have routinely been used as baseline to analyse and understand the production of QCD matter expected to be produced in nuclear collisions. Therefore, results from $p+p$ collisions required more careful investigation to understand whether QCD matter is produced in high multiplicity $p+p$ collisions. With this motivation, the Glauber model traditionally used to study the heavy-ion collision dynamics at high-energies is applied to understand the dynamics of $p+p$ collisions. We have used anisotropic and inhomogeneous quark/gluon based proton density profile, a realistic picture obtained from the results of deep inelastic scattering, and found that this model explains the charged-particle multiplicity distribution of $p+p$ collisions at LHC energies very well. Collision geometric properties like impact parameter and mean number of binary collisions ($\langle N_{coll} \rangle$), mean number of participants ($\langle N_{part} \rangle$) at different multiplicities are determined for $p+p$ collisions. We further used these collision geometric properties to estimate average charged-particle pseudorapidity density ($\langle dN_{ch}/d\eta \rangle$) and found it to be comparable with the experimental results. Knowing $\langle N_{coll} \rangle$, we have for the first time obtained nuclear modification-like factor ($R_{HL}$) in $p+p$ collisions. We also estimated eccentricity and elliptic flow as a function of charged-particle multiplicity using the linear response to initial geometry and found a good agreement with experimental results.

Speaker: Suman Deb (Indian Institute of Technology Indore (IN))

LHCP_Suman_Glauber.pdf

Zoom meeting room

6:45 PM Extraction of the multiplicity dependence of Multiparton Interactions from LHC pp data using Machine Learning techniques

Over the last years, Machine Learning (ML) tools have been successfully applied to a wealth of problems in high-energy physics. In this talk, we will discuss the extraction of the average number of Multiparton Interactions ($〈N_{mpi}〉$) from minimum-bias pp data at LHC energies using ML methods. Using the available ALICE data on transverse momentum spectra as a function of multiplicity we report the $〈N_{mpi}〉$ for pp collisions at √s = 7 TeV, which complements our previous results for pp collisions at √s = 5.02 and 13 TeV. The comparisons indicated a modest energy dependence of $〈N_{mpi}〉$. We also report the multiplicity dependence of $N_{mpi}$ for the three center-of-mass energies. These results are fully consistent with the existing ALICE measurements sensitives to MPI, therefore they provide experimental evidence of the presence of MPI in pp collisions.

Speaker: Erik Alfredo Zepeda Garcia (Universidad Nacional Autonoma (MX))

LHCP2021erik.pdf

Zoom meeting room

6:45 PM Fast Beam Condition Monitor of the CMS experiment for precision luminosity measurement at HL-LHC

To achieve the challenging target of 1% precision on luminosity determination at the high-luminosity LHC (HL-LHC) with instantaneous luminosity up to $7.5 × 10^{34} cm^{−2} s^{−1}$, the CMS experiment will employ multiple luminometers with orthogonal systematics. A key component of the proposed system is a stand-alone luminometer, the Fast Beam Condition Monitor (FBCM), which is fully independent from the central trigger and data acquisition services and able to operate during all times at 40 MHz providing bunch-by-bunch luminosity measurement with 1 s time granularity. FBCM is foreseen to be placed inside the cold volume of the Tracker as it utilizes silicon-pad sensors exploiting the zero-counting algorithm of hits for luminosity measurement. FBCM will also provide precise timing information with a few ns precision enabling the measurement of beam induced background. We report on the optimization of the design and the expected performance of FBCM.

Speaker: Hamed Bakhshiansohi (DESY and IUT)

FBCMPosterLHCP2021.pdf

Zoom meeting room

6:45 PM Fast simulation of a Time-of-Flight detector for Forward Protons at the LHC

The ATLAS Forward Proton physics program at CERN aims at studying soft and hard diffractive events from ATLAS proton collisions. Time-of-Flight (ToF) system is used to reduce the background from multiple proton-proton collisions. In this presentation, we describe technical details of the Fast Cherenkov model of photons generation and transportation through the optical part of the ToF detector. This Fast simulation uses Python programming language and Numba (high performance compiler). It is about 200 times faster than Geant4 simulation already implemented, and provides similar results concerning length and time distributions of photons. Moreover, this Fast simulation allows computing easily the time resolution of the different bars of ToF detector.

Speaker: Olivier Rousselle (Laboratoire Kastler Brossel (FR))

Fast simulation - Olivier Rousselle.pdf

ZOOM poster room

6:45 PM FELIX-based Data Acquisition System Integration with the NSW Micromegas Electronics and Detector Performance Validation

The New Small Wheel (NSW) upgrade is now in its commissioning phase. The future ATLAS detector sub-system will be one of the first to employ the Front-End Link eXchange (FELIX) as its Data Acquisition (DAQ) scheme. Currently, one of the main focus points of the community is to ensure proper acquiring of data from the detector media, besides validating the performance of the detectors themselves. This is being conducted at the BB5 area of CERN, where the Micromegas chambers are subjected to cosmic radiation. In this work, the software and FPGA-based tools that have been developed to aid in satisfying the stringent 2-week turnaround time per detector wedge will be described. These include applications that control the complex DAQ system and validate the data paths of thousands of readout channels and hundreds of high-speed optical links in an automated manner. Another aspect of the work is the description of methodologies that have been developed to validate the chamber’s performance under cosmic radiation. Finally, an FPGA system that performs scintillator coincidence trigger filtering will be described. The aforementioned part of the system is used to emulate the deterministic nature of the muons’ time-of-arrival during the actual run, in order to perform timing resolution performance profiling of the Micromegas detector.

Speaker: Christos Bakalis (National Technical Univ. of Athens (GR))

lhcp_poster_bakalis.pdf

Zoom Meeting Room

6:45 PM Femtoscopic analysis of $\mathrm{K^0_S-p}$ pairs in proton–proton collisions at $\sqrt{s} = 13$ TeV with ALICE

The precise knowledge of the strong interaction between kaons and nucleons
is a key element to describe the interactio