Topics in NLO QCD

Friday 2 Jul 2010, 08:00 → 18:30 Europe/Zurich

TH Theory Conference Room (CERN)

Michelangelo Mangano (CERN), Stefano Frixione (CERN and EPFL)

 This month LHC physics day is dedicated to various aspects of precision predictions for hard QCD processes at the LHC. The emphasis will be on the determination of uncertainties, coming from the input PDFs and from the scale dependence of the calculations. In the afternoon there will be a session dedicated to computing issues, with a discussion of the main numerical bottlenecks limiting the performance of the existing codes.  

The meeting will be broadcast via EVO (detailed info will appear at the time of the meeting in the "Video Services" item on the left menu bar)

For those attending, information on accommodation, access to CERN and laptop registration is available from http://cern.ch/lpcc/visits

09:00 → 09:30 Welcome coffee

Coffee offered in the TH common room, in front of the TH secretariat

09:30 → 10:00 PDF

09:30 PDF progress

Speaker: James Stirling (Cambridge University)

10:00 → 13:00 Scale uncertainties at (N)NLO

10:00 Introduction

Speaker: Michelangelo Mangano (CERN)

Slides mangano-scaledep.pdf

10:30 W+jets systematics

Speaker: Daniel Maitre

11:00 W+jets: NLO vs matrix element systematics

Speaker: Kirill Melnikov

11:30 Discussion

13:00 → 14:00 Lunch break

14:00 → 15:15 TH seminar by J.Maldacena

15:30 → 17:30 Computing issues at NLO

This session will focus on code optimization issues. Experts on software performance will be present to learn about the possible needs that emerge from demanding NLO calculations. They will give an overview of available software performance monitoring tools, and illustrate ongoing projects at CERN on multi-core CPU optimization. The goal of the session is to identify possible topics for cooperation towards the improvement of the CPU performance of NLO codes.

15:30 Software performance monitoring

Speakers: Daniele Francesco Kruse, vincenzo innocente (CERN)

Slides

• th_07_2010.pdf
• th_07_2010.ppt
• VIatTH0710.pdf
• VIatTH0710.ppt

16:00 TBA

Speaker: Darren Forde

Slides Forde.pdf

16:30 TBA

Speakers: Rikkert Frederix, Rikkert Frederix

Slides Frederix.pdf

17:00 GPUs for ME calculations, et al

Speaker: Jan-Christopher Winter (Fermilab)

Slides gpu.cern.pdf