First Lund Jet Plane Institute

3 Jul 2023, 14:00 → 7 Jul 2023, 19:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Gregory Soyez (IPhT, CEA Saclay)

Jet substructure techniques are now routinely used in collider phenomenology. This specialised workshop evolves around a recent tool called the Lund Jet Plane(s). The main idea is to use the Cambridge/Aachen clustering technique (i.e. a roughly angular-ordered clustering tree) to associate a kinematic structure, akin to the Lund planes used in resummations and in Monte Carlo generators, to a high-energy jet. This structure can then be used in a wide range of applications. The goal of this workshop is to provide a theoretical and experimental overview of these applications and their connections with other tools in the field. A special emphasis will be put on recent developments and on discussions of future potential directions. This includes the following list of topics:

• Constraints on Monte Carlo generators from Lund plane density measurements
• Tagging of light-quarks vs. gluon
• Boosted V/H/t vs. QCD jets discrimination
• Mass effects in the Lund plane (dead cone, heavy flavor tagging)
• Applications to BSM searches
• Studies of the quark-gluon-plasma in heavy-ion collisions
• Jet substructure measurements (generalised angularities, groomed observables,..)
• Machine learning tools (e.g., LundNet, ParticleNet, GNN)
• Lund-plane observables to constrain parton showers with N^kLL resummation
• Strategies to mitigate quark/gluon fraction issues.
• Possible αs extractions with jet substructure.

The workshop will consist of afternoon talks. One of the key aspect of the workshop will be to leave time for common discussions and work between theorists and experimentalists.   

Organising committee:

• Cristian Baldenegro (LLR, co-chair)
• David d’Enterria (CERN, co-chair)
• Raghav Kunnawalkam Elayavalli (Vanderbilt)
• Matt LeBlanc (CERN)
• Simone Marzani (Università di Genova)
• Matt Nguyen (LLR)
• Jennifer Roloff (BNL)
• Alba Soto Ontoso (CERN, co-chair)
• Gregory Soyez (IPhT Saclay, CERN, co-chair)
• Marta Verweij (Utrecht)

 

Booking form First Lund Jet Plane Workshop 07.2023.pdf

Monday, 3 July

1 Introduction

Speakers: David d'Enterria (CERN), Gregory Soyez (IPhT, CEA Saclay)

LJPwelcome.pdf

2 A history of Lund diagrams and resummations

Speaker: Prof. Andrea Banfi (University of Sussex)

banfi_CERN_23.pdf

banfi_CERN_23.pptx

15:00 Coffee break

3 Counting jets in the Lund Plane

Speaker: Alba Soto Ontoso (CERN)

lund_alba.pdf

4 Jets and Lund plane studies at LHCb

Speaker: Christine Aidala (University of Michigan (US))

AidalaLJPInstJul2023.pdf

5 Measurements of the Lund jet plane and its properties (ATLAS)

Speaker: Emily Ann Smith (University of Chicago (US))

LundJetPlane2023 Workshop.pdf

Tuesday, 4 July

6 The Lund plane as a way to constrain the quark-gluon plasma

Speaker: Konrad Tywoniuk (University of Bergen (NO))

LundPlaneWorkshop2023_KonradTywoniuk.pdf

7 Studying jet shower modifications in the quark-gluon plasma using the Lund tree (CMS)

Speaker: Ms Yi Chen (Massachusetts Inst. of Technology (US))

20230704_CMSLundHeavyIon_LundPlaneWorkshop_YiChen_v9.pdf

15:00 Coffee break

8 Jet substructure measurements probing the Lund radiation plane in pp and Pb-Pb collisions (ALICE)

Speaker: Raymond Ehlers (University of California Berkeley (US))

2023-07-04.rehlers.alice_substructure_lund_plane.v4.pdf

9 Tracing heavy quark trajectories in pp and Pb-Pb collisions, including future challenges and opportunities (ALICE)

Speaker: Nima Zardoshti (CERN)

LundPlane2023_HFTracing.pdf

10 Dead-cone searches in heavy-ion collisions using the jet tree

Speaker: Leticia Cunqueiro Mendez (Roma Sapienza University)

LundPlaneWorkshop_Cunqueiro.pdf

11 Discussion

Wednesday, 5 July

Theory Colloquium

This is the weekly CERN TH colloquium:
https://indico.cern.ch/event/1263512/

15:00 Coffee break

12 Collider events on a quantum computer

Speaker: Simon Williams (Imperial College London)

SimonWilliams_LundPlaneInst23.pdf

13 Jet substructure using the Lund tree in 13 TeV pp collisions (CMS)

Speaker: Cristian Baldenegro Barrera (Laboratoire Leprince-Ringuet)

LJPworkshop.pdf

14 Exploiting the Lund plane to study jet splitting kinematics at RHIC energies (STAR)

Speaker: Monika Robotková (Nuclear Physics Institute, Czech Academy of Sciences)

LundPlane_CERN_2023_Robotkova.pdf

15 Lund planes for parton-shower development

Speaker: Mrinal Dasgupta (Unknown)

md-lund-inst.pdf

16 Discussion

Thursday, 6 July

Collider X-Talk: the primary Lund Plane density

The talk is part of the Collider X-Talk series.
See https://indico.cern.ch/event/1283774/
Note: this will be held in the TH Common room (4/2-011)

12:00 Lunch

BSM Forum: Dark showers and the Lund Plane

The talk is part of the CERN TH BSM Forum series.
See https://indico.cern.ch/event/1291720/

Convener: Tim Cohen (CERN)

17 Jet substructure at RHIC as a roadmap towards the EIC

Speaker: Raghav Kunnawalkam Elayavalli (Vanderbilt University)

jets_rhic_eic_lundplane_raghav_7july2023_v0.pdf

15:00 Coffee break

18 Tagging using Lund plane variables

Speaker: Charanjit Kaur Khosa

Lund_TH_CK.pdf

19 Jet tagging with the Lund jet plane (ATLAS)

Speaker: Jad Mathieu Sardain (University of Arizona (US))

JMS_LJPInstitute_July2023.pdf

20 Discussion

Friday, 7 July

21 Breaking the q/g degeneracy in extractions of the strong coupling from jet substructure

Speaker: Matt LeBlanc (University of Manchester (GB))

20230708_MLB_JSSAlphaS.pdf

22 Quark/gluon tagging using Lund Plane information

Speaker: Gregory Soyez (IPhT, CEA Saclay)

qg.pdf

15:00 Coffee break

23 Closing

Speakers: Alba Soto Ontoso (CERN), Cristian Baldenegro Barrera (Laboratoire Leprince-Ringuet), Gregory Soyez (IPhT, CEA Saclay)

ConcludingRemarks-1.pdf