HERA and the LHC
A workshop on the implications of HERA for LHC physics
CERN - DESY Workshop 2004/2005
latest update Jan 13, 2006
Meetings - agenda and
DESY: Hannes Jung (DESY/Lund, chair), J. Blümlein (DESY), J. Butterworth (UCL), P. Newman (Brimingham),
R. Yoshida (ANL)
CERN : A. De Roeck (CERN, chair), G. Altarelli (CERN), K. Eggert (CERN), M. Mangano (CERN),G. Polesello (INFN/CERN), A. Morsch (CERN), M. Botje (Nikhef), O. Schneider (EPFL)
and articles about the HERA - LHC
Uta Stoesslein - HERA and the LHC at Topical Conference on Hadron Collider Physics, HCP 14-18 June 2004 (talk)(proceedings)
Albert De Roeck - Introduction, pdfs and diffraction at TeV4LHC, Fermilab,16-18 September, 2004(talk)
Mike Seymour - Heavy quarks, jets and event generators at TeV4LHC, Fermilab, 16-18 September, 2004 (talk)
Hannes Jung - HERA results and implications for LHC physics at LHC days in Split 5-8 Oct 2004 (talk)
Hannes Jung et al - HERA and the LHC topics (ppt)
Albert De Roeck - HERA and the LHC, Madison, DIS05, May 2005
Hannes Jung - HERA and the LHC (ppt) (talk at PRC meeting, DESY Hamburg , 26. May. 2005)
Max Klein - HERA QCD results, what they mean for the LHC (Hadron Collider Physics Symposiuml, Les Diablerets, Switzerland, 4-9. July 2005)
Hannes Jung - HERA and the LHC (Seminar Uni. Zurich, 7. Sept. 2005)
Hannes Jung - HERA can teach the LHC (ppt) (Seminar Universidad Autonoma de Madrid, Departimento de Fisica Teorica 11. Nov 2005)
Hannes Jung - HERA can teach the LHC (ppt) (DESY Seminar 12. Jan 2006)
The impact of measurements made at HERA, present and future, on the physics of the LHC is potentially large. However, this potential is currently not as well explored as e.g. the more obvious connection between the Tevatron and the LHC.
The most obvious area of impact is in the determination of proton structure from very low to very high x, which is measured precisely at HERA. Others topics include QCD production of heavy flavors and the study of multi-jet final states, energy flows and structure of underlying events. A unique feature of HERA is the photon, which, depending upon its virtuality, can be hadronic or point-like, enabling to effectively turn on and off the internal structure of one of the beam particles. Finally, the area of diffractive and forward physics, where HERA data have made a large impact in the last decade, is of growing interest to LHC experimentalists as a window on high density and low x QCD and as a search channel for new physics.
To identify and prioritize those measurements to be made at HERA which have an impact on the physics reach of the LHC.
To encourage and stimulate transfer of knowledge between the HERA and LHC communities and establish an ongoing interaction.
To encourage and stimulate theory and phenomenological efforts related to the above goals.
To examine and improve theoretical and experimental tools related to the above goals.
To increase the quantitative understanding of the implication of HERA measurements on LHC physics.
high x and low x gluon and quarks from HERA fits, un-integrated pdfs (kt factorization), parton luminosities and precision cross section measurements at LHC
Underlying event and minimum bias, Rapidity gaps and survival probabilities, Multi-jet topologies and multi-scale QCD, Parton shower/ME matching
production cross sections, fragmentation, charm and beauty in the proton distributions.
Diffractive pdfs and (non)factorization, Rapidity gaps and physics with forward proton tagging, Forward physics and low-x dynamics, Heavy Ions and high density QCD
General Monte Carlos (Pythia, Herwig, Phojet), New Monte Carlos with kt factorisation, NLO calculation (MC@NLO, NLOLIB...), MC Validiation & tuning (JetWeb, HZTOOL)
Real progress in terms of improved or new programs cannot be achieved in a single meeting, but require substantial work and thereby time. Therefore, we plan a plenary starting meeting March 26 - 27, 2004 to discuss the problems, set priorities and form study groups. These groups will then have informal meetings as necessary over a rather long period. We will avoid having a big organization with many formal groups and conveners, but some coordination will be needed for different topics. A mid-term plenary meeting is planned for late September or early October 2004 and the final meeting at DESY in January 2005. Those interested are welcome to spend some time at DESY, not only for these meetings, but also for more extensive collaborative work.
Final meeting at DESY with presentation of results. The main outcome should be identify and prioritize those measurements to be made at HERA which have an impact on the physics reach of the LHC. We will have proceedings, with a summary report from each working group and individual contributions. The proceedings will be printed and published electronically.