HERA and the LHC

A workshop on the implications of HERA for LHC physics

CERN - DESY Workshop 2004/2005

latest update Jan 13, 2006

Download Workshop poster

List of Participants for final meeting

Background and aim / Topics to be studied / Time plan and organization / Presentation of results


Meetings - agenda and presentations:

Start-up meeting: CERN March 26-27 2004
Press News: Start-Signal for HERA-LHC Workshop
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Working group meetings: DESY June 1 - 4 2004
Mid-term review meeting: CERN October 11 - 13 2004
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Working group meeting: DESY Nov 15 - 19 2004
Working group meeting: CERN January 17 - 21 2005
Final meeting: DESY March 21-24  2005

How to get to CERN        Housing at CERN        Hotels   

How to get to DESY        Housing at DESY         Hotels   

Organizing Committee:

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)

Parton density functions

Multi-jet final states and energy flows

Heavy quarks (charm and beauty)


MC tools

Talks and articles about the HERA - LHC  workshop:

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

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)

Background and Aim:

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.

Time plan and organization:

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.

Presentation of results:

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.