Topical workshop on top quark differential distributions

26 Sept 2014, 14:00 → 28 Sept 2014, 18:00 Europe/Zurich

Cannes, France

Alexander Mitov (University of Cambridge), Juan Rojo Chacon (CERN), Michal Czakon (RWTH Aachen)

The Workshop aims at maximising the scientific opportunity presented by:

• The forthcoming fully differential results for top pair production at NNLO, and
• The post-Higgs-discovery restart of the LHC at maximum energy.

The meeting will bring together a group of experts in top physics and closely related subjects (parton distribution functions, parton showers, soft gluon resummation). The discussion will also be guided by the subtleties of experimental SM and bSM analyses.

The goal of the Workshop is to maximise the impact of the forthcoming fully differential NNLO results and help guide the need for further developments. Some questions that ideally will be addressed are:

• What unstudied distributions will be of interest,
• The role of soft and collinear resummation; where it is needed,
• Impact on PDF's,
• Transitioning to realistic final states: including top decays, finite width corrections, parton showers, etc.
• Experimental issues,
• "Requests" from bSM physics.

The format of the meeting will be 2 days of selected plenary talks with plenty of time for discussions. To maximise the scientific opportunity, the meeting will take place at the same location as, and will immediately precede, the annual Workshop Top2014. This will allow the participants to attend also the Top2014 Workshop (separate registration is required!). Ideally we would like to produce a concise White paper that summarises the findings and recommendations of the Workshop.

The meeting is by invitation only. If interested, please contact one of the organisers. 

Confirmed participants include: Maria Aldaya (DESY), Freya Blekman (Vrije), Alessandro Broggio (PSI), Fabrizio Caola (Johns Hopkins), Tancredi Carli (CERN), Roberto Chierici (CERN/Lyon), Amanda Cooper-Sarkar (Oxford), Michael Czakon (Aachen), Carmen Diez (DESY), Stefano Forte (Milano), Rikkert Frederix (CERN), Philip Ilten (MIT), James Keaveney (Brussels), Andreas Meyer (DESY), Alexander Mitov (Cambridge), Andrew Papanastasiou (DESY), Joao Pires (Milano), Stefan Prestel (DESY), Juan Rojo (CERN/Oxford), Jose Santiago (Granada), Markus Schulze (CERN), Francesco Spano (Royal Holloway), Roberto Tenchini (Pisa), Robert Thorne (UCL), Jan Winter (Munich), Malgorzata Worek (Aachen).  

This workshop is partially supported by the European Research Council Starting Grant 'PDF4BSM: Parton Distributions in the Higgs Boson Era'

Friday 26 September

1 Welcome note

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

Slides AlexanderMitov-workshop-opening.pdf

NNLO (part 1)

2 Top pair production

Speakers: Alexander Dimitrov Mitov (University of Cambridge (GB)), Michal Czakon (RWTH Aachen)

Slides AlexanderMitov-tt-NNLO.pdf

3 Discussion

NNLO (part 2)

4 Single top production

Speaker: Fabrizio Caola (Johns Hopkins University)

Slides caola_singletop_diff.pdf

5 Discussion

6 Dijets

Speaker: Joao Pires (Milano Bicocca)

Slides pires.pdf

7 Discussion

Saturday 27 September

Realistic Final States (part 1)

8 Top induced backgrounds to the Higgs production (20+10 min)

Speaker: Rikkert Frederix (CERN)

Slides frederix.pdf

9 Fixed order + parton showers (20+10 min)

Speaker: Stefan Prestel (Deutsches Elektronen-Synchrotron (DE))

Slides talk20140927.pdf

Realistic Final States (part 2)

10 Precision Top Quark Phenomenology with realistic final states (20+10 min)

Speaker: Markus Christian Schulze (CERN)

Slides top_kinem_schulze.pdf

11 Monte Carlo modelling issues in ttbar+jets production and friends (20+10 min)

Speaker: Jan-Christopher Winter (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)

Slides mcttbarjets-Winter.pdf

12 Top Quark Physics with HELAC-NLO (20+10 min)

Speaker: Dr Malgorzata Worek (Bergische Universitaet Wuppertal (DE))

Slides mworek.pdf

Discussion on experimental issues

13 Discussion

Speakers: Dr Francesco Spano (Royal Holloway, University of London (GB)), Maria Aldaya Martin (DESY)

Slides spanoAldayaExperimentalDiscussion27thSep2014.pdf

14 Top Measurement Prospect with LHCb

Speaker: Philip Ilten (Massachusetts Inst. of Technology (US))

Slides ilten140927.pdf

15 Discussion

PDF's

16 Constraints on the gluon PDFs from differential measurements of top quark pair production

Speaker: Juan Rojo Chacon (University of Oxford (GB))

Slides rojo-ttbar-diff.pdf

17 Fitting ATLAS t-tbar differential distributions in the HERAPDF formalism

Speaker: Amanda Sarkar (University of Oxford (GB))

Slides top_cannes_sep2014.pdf

18 Updates of PDFs and top quark production

Speaker: Prof. Robert Samuel Thorne (University College London (UK))

Slides topdiff.pdf

19 Top at the LHC and Preview of CT14

Speaker: Prof. Joey Huston (Michigan State University (US))

Slides huston_top.pdf

20 Discussion

Sunday 28 September

Approximate Higher Order Calculations

21 RG-improved fully differential predictions for top-pair production (20+10 min)

Speaker: Andrew Sofronis Papanastasiou (DESY)

Slides papanastasiou.pdf

22 Approximate cross-sections from analyticity: the case of top pair production (20+10 min)

Speaker: Stefano Forte (Università degli Studi e INFN Milano (IT))

Slides hqapp.pdf

BSM aspects

23 Lessons learned from searches for BSM physics with top as a background

Speaker: Freya Blekman (IIHE, Vrije Universiteit Brussel (BE))

Slides Top2014PreworkshopBSMtopBg_fblekman.pdf

24 New Physics in ttbar+X resonances

Speaker: Jose Santiago (Granada University)

Slides JSantiagoTopDifferential2013.pdf

25 Discussions

26 Closing Remarks

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