TH/LPCC Institute on SM at the LHC

1 Oct 2012, 09:30 → 12 Oct 2012, 18:00 Europe/Zurich

TH Theory Conference Room (CERN)

Gavin Phillip Salam (CERN), Michelangelo Mangano (CERN), Peter Skands (CERN), Stefano Frixione (CERN)

In the first week the TH Institute will focus on theoretical aspects of SM physics at the LHC. Attendance to this part of the programme is limited and by invitation only.

The second week is open, and will feature plenary meetings of the LHC working groups related to SM physics (EW WG and Top WG) and of PDF4LHC. The Institute participants are invited to attend this event as well.

During the first week, we plan to have just a few short talks during a one-hour session each day, to stimulate discussions on the following topics:

1. NLO Automated calculations, in the context of fully automated MC generators.
   • existing tools
   • review of suitability of LH interfaces
   • needs and required further progress/developments
   • BSM NLO corrections: benefits vs costs
2. NNLO
   • cancellation of singularities: analytical, semi-analytical, local, and implications on numerical stability;
   • extent to which current approaches are parton-level generators (ie, capable of predicting simultaneously observables with arbitrary cuts);
   • will the results be suitable for PDF fits? If not, what does it take to get there?
3. EW corrections
   • assessment of existing results
   • EW showers in the MCs
   • finite-width effects and treatment of unstable particles
   • interplay with degree of inclusiveness of observables.
4. MCs and resummation
   • matching at NLO
   • merging multiplicities with NLO+PS
   • theory systematics: ME and shower hard and soft scale dependencies, matching-method uncertainties
   • beyond LL showers

The agenda of the second week will appear on the indico pages of the WGs and will be linked from here.

Monday 1 October

09:30 → 10:00 Coffee

10:00 → 11:00 NLO calculations - automation (or not)

10:00 Automatic NLO calculations with GoSam via BLHA

Speaker: Gionata Luisoni (Universität Zürich)

Slides GoSam.pdf GoSam.pptx

10:15 Ingredients for describing production and decay of massive short-lived particles with non-trivial decay chains

Speaker: Markus Schulze (Argonne National Laboratory)

Slides CERN.Schulze.Short.pdf

10:30 NLO HELAC

Speaker: Costas Papadopoulos (Nat. Cent. for Sci. Res. Demokritos (GR))

Slides cern-th-inst-2012.pdf

16:00 → 16:30 Coffee

Tuesday 2 October

09:30 → 10:45 Issues and ideas for merging different NLO multiplicities

09:30 TBA

Speaker: Leif Ingvar Lonnblad (Lund University (SE))

Slides CERN12b.pdf

09:45 Antenna Showers with One-Loop Corrections

Speaker: Peter Skands (CERN)

Slides 12-oct-oneloop.pdf

10:00 Matching and Merging at NLO

Speaker: Stefan Hoeche (SLAC)

Slides cern_12-10.pdf

10:15 Multi-jet merging with MC@NLO

Speaker: Stefano Frixione (CERN)

10:30 The importance of higher log resummation in extending CKKW to NLO

Speaker: Prof. Christian Bauer (UC Berkeley)

Slides bauer.pdf

11:00 → 11:30 Coffee

16:00 → 16:30 Coffee

Wednesday 3 October

09:30 → 10:00 Coffee

10:00 → 11:00 NNLO progress and methods

10:00 Real Radiation at NNLO with the STRIPPER Subtraction Scheme

Speaker: Michal Czakon (RWTH Aachen)

Slides talk.pdf

10:15 Numerical evaluation of integrals for NNLO calculations with SecDec-2.0

Speaker: Gudrun Heinrich (Max Planck Institute for Physics)

Slides GH_SecDec.pdf

10:30 NNLO OPP

Speaker: Costas Papadopoulos (Nat. Cent. for Sci. Res. Demokritos (GR))

Slides cern-th-inst-2012-1.pdf

10:45 Multi-loop extension of integrand reduction methods using algebraic geometry

Speakers: Edoardo Mirabella (Max Planck Institute for Physics), Pierpaolo Mastrolia (Max Planck Institute for Physics)

Slides mastrolia_cern.pdf

15:30 → 16:00 Coffee

16:00 → 17:00 NNLO progress and methods

16:00 Direct numerical integration at two- and three-loops

Speaker: Prof. Weinzierl Stefan (Mainz University)

Slides weinzierl_sm_lhc.pdf

16:15 Reverse unitarity and threshold expansions

Speaker: Charalampos Anastasiou (ETH Zurich)

Slides anastasiou_NNNLOsoft.pdf

16:30 Local subtraction at NNLO

Speaker: Gabor Somogyi (DESY, Zeuthen)

Slides somogyi.pdf

18:00 → 19:00 Reception

Thursday 4 October

09:00 → 10:15 EW effects; QCD resummation

09:00 Inclusion of W/Z emission in showers

Speaker: Torbjorn Sjostrand (Lund University (SE))

Slides wzshowers.pdf

09:15 Parton kinematics vs hadron kinematics and the impact of higher order corrections in Higgs production

Speaker: Marco Bonvini (Genova)

Slides bonvini_CERN_TH_institute.pdf

09:30 SCET vs perturbative QCD

Speaker: Giovanni Ridolfi (INFN, Genova)

Slides ridolfi_cern12.pdf

10:15 → 10:45 Coffee

11:00 → 12:00 Collider Cross Talk seminar

Speaker: Keith Murray Hamilton (CERN)

Link to CCT agenda https://indico.cern.ch/conferenceDisplay.py?confId=201162

16:00 → 16:30 Coffee

Friday 5 October

09:30 → 10:00 Coffee

10:00 → 11:00 Further contributions

10:00 Matrix Element Method at NLO

Speaker: Ciaran Williams (Fermilab)

Slides CERNMEM.pdf

10:15 Efficient method of adding NLO corrections into ladder of initial state parton shower

Speaker: Staszek Jadach (Henryk Niewodniczanski Inst. Nucl. Physics)

Slides CERNoct2012.pdf

16:00 → 16:30 Coffee

Monday 8 October

09:00 → 18:00 PDF4LHC and EW WG meeting

Link to the EW WG agenda https://indico.cern.ch/conferenceOtherViews.py?view=standard&confId=203748

Tuesday 9 October

09:00 → 18:00 PDF4LHC and EW WG meeting

Link to the EW WG agenda https://indico.cern.ch/conferenceOtherViews.py?view=standard&confId=203748

Wednesday 10 October

09:00 → 13:00 PDF4LHC and EW WG meeting

Link to the EW WG agenda https://indico.cern.ch/conferenceOtherViews.py?view=standard&confId=203748

Friday 12 October

15:00 → 18:00 Higgs XS WG: Jet Issues in Higgs Physics

Link to agenda https://indico.cern.ch/conferenceDisplay.py?confId=211870