Jet quenching: the interface between theory and experiment

11 Feb 2013, 08:00 → 15 Feb 2013, 18:00 Europe/Zurich

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

Alexander Milov (Weizmann Institute of Science (IL)), Brian Cole (Columbia University (US)), Christian Klein-Boesing (Westfaelische Wilhelms-Universitaet Muenster (DE)), Christof Roland (Massachusetts Inst. of Technology (US)), Korinna Christine Zapp, Marco Van Leeuwen (University of Utrecht (NL)), Urs Wiedemann (CERN)

This one-week workshop will focus on the interface between experimental studies of jet quenching and its modeling, including technical aspects. The main aim is to sharpen our understanding of problems at this interface and how they limit physics conclusions, and to discuss improvements. Open sessions will be limited to the late afternoons and they will feature mainly open round-table discussions, as well as a limited number of scheduled presentations. After an introductory session on Monday (11 Feb) that will include short presentations by all LHC experiments, the topical discussions in the following days will focus on i) experimental issues of jet quenching (such as unfolding, jet algorithms and background subtraction), ii) issues related to Monte Carlo studies of jet quenching (including inputs and defaults, the interface with medium modeling, and output/event formats) and iii) issues arising at the interface between experiment and theory. On this point, discussions will aim at clarifying what we do and what we don't understand at present, and what is needed by the experimental and theory community to make progress. On all topics, the discussion will aim at covering not only the conceptual but also the technical level.

Monday, 11 February

14:00 → 17:30 Introductory Session

Conveners: Dr Christof Roland (Massachusetts Inst. of Technology (US)), Urs Wiedemann (CERN)

14:00 Introductory remarks

14:15 Satus of Jet Measurements in CMS

Speaker: Yen-Jie Lee (CERN)

Slides 20130211-CERN_yenjie-v4p.pdf 20130211-CERN_yenjie-v4p.ppt

14:45 Status of Jet Measurements in ATLAS

Speakers: Aaron Richard Angerami (Columbia University (US)), Brian Cole (Columbia University (US))

Slides angerami_CERN_quenching_workshop_1.pdf

15:15 BREAK

15:30 Status of Jet Measurements in ALICE

Speaker: Rosi Jan Reed (Yale University (US))

Slides RReedJetQuench2013v5.pdf

16:00 Status of Jet quenching - theory

Speaker: Jorge Casalderrey Solana (University of Barcelona (ES))

Slides thjcs.pdf

16:30 Discussion Session

Tuesday, 12 February

15:00 → 18:00 Characterizing jet quenching: experimental issues

• technical aspects of jet quenching measurements: unfolding, jet algorithms, background subtraction
• how this information is made available to theorists
• wishlist of experimentalists: what is needed from the TH community to make progress

Convener: Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))

15:00 Introductory remarks

Speaker: Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))

Slides IntroExp.pdf

15:20 Jet reconstruction and corrections in ALICE

Speaker: Marta Verweij (University of Utrecht (NL))

Slides JetRecoAndCorrectionsV4.pdf

15:40 Aspects of HI jet reconstruction in ATLAS

Speakers: Aaron Richard Angerami (Columbia University (US)), Brian Cole (Columbia University (US)), Martin Spousta (Columbia University and Charles University)

Slides angerami_CERN_quenching_workshop_2.pdf

16:00 Jet Reconstruction and Underlying Event treatment in CMS

Speaker: Yetkin Yilmaz (Massachusetts Inst. of Technology (US))

Slides jetquen_yetkin_v7.pdf

Wednesday, 13 February

15:30 → 18:30 Modeling jet quenching: Monte Carlo related issues

• technical aspects: inputs and defaults, medium modeling, output/event format etc.
• how/to what extent Monte Carlo models are validated against theoretical benchmarks and experimental baselines
• wishlist of theorists to the experimental community

15:40 Introductory remarks

Speakers: Gunther Roland (MIT, Cambridge), Urs Wiedemann (CERN)

Slides Todiscuss.pdf Todiscuss.ppt

15:55 MC implementation of coherence effects, status and perspectives

Speaker: Dr Konrad Tywoniuk (Universidade de Santiago de Compostela)

Slides CERN2013_Tywoniuk.pdf

16:15 Background Subtraction and Jet Quenching - theory perspective

Speaker: Liliana Marisa Cunha Apolinario (Universidade de Santiago de Compostela (ES))

Slides Liliana.pdf

16:35 Jet reconstruction in heavy ion collisions - some thoughts

Speakers: Gavin Phillip Salam (CERN), Matteo Cacciari (LPTHE Jussieu)

Slides jet-reco-thoughts.pdf

Thursday, 14 February

15:00 → 18:00 Jet quenching: interface between theory and experiment

• discussion will start with a short summary of experimental and theoretical issues identified in the sessions on Tu and We.
• How can we improve the current state of art?

Conveners: Korinna Christine Zapp, Urs Wiedemann (CERN)

15:00 thoughts on how to continue

Speaker: Marco Van Leeuwen (University of Utrecht (NL))

Slides JetWorkshop_discussion_mvanleeuwen.pdf JetWorkshop_discussion_mvanleeuwen.ppt