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.
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.
Information
on the expected capacity and reach of HERA-II can be found here
Topics
to be studied:
Parton
density functions
Topics:
parton
luminosities and precision cross section measurements at LHC;
strange, charm and bottom quark distributions; treatment of heavy
quark thresholds; higher order corrections and pdf fits;
resummation at small and large x and its inclusion in pdf fits; new
methods for the determination of pdf errors; unintegrated pdfs
Diffraction
Topics:
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
MC
- tools:
Topics:
General
Monte Carlos (Pythia, Herwig, Phojet), New Monte Carlos with kt
factorisation, NLO calculation (MC@NLO, NLOLIB...), MC Validiation
& tuning (JetWeb, HZTOOL)
Time
plan and organization:
The HERA - LHC workshops
will be held yearly, the working group week meeting in 2007 is at
DESY, the meeting 2008 is at CERN.
Presentation
of results:
We will have proceedings
after the 2008 meeting, with a summary report from each working group
and individual contributions. The proceedings will be printed and
published electronically.
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