Berlin 2005 – scientific programme

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T: Teilchenphysik

T 103: Hauptvortr
äge III

T 103.3: Invited Talk

Monday, March 7, 2005, 11:55–12:40, TU H105

Precision QCD Mesurements at HERA and the Implications for LHC — •Tancredi Carli — CERN

Strong interactions will be ubiquitous at the Large Hadron Collider (LHC) since the colliding beams consist of confined quarks and gluons. To maximise the precision and sensitivity of many physics analyses at LHC it is necessary to understand various perturbative, semi-perturbative and non-perturbative QCD effects. The electron proton collider HERA provides a clean QCD laboratory where the quantitative understanding of hadron production at high energies can be studied.

I will review the latest status of the measurement of the proton structure function and the extraction of the proton parton densities and their uncertainties after the HERA-I running period. I will discuss the implications for the quantitative prediction of cross-sections at LHC. This includes the possibility to validate our understanding of the evolution of parton densities and of the strong coupling to very high momentum transfers accessible at LHC using techniques developed at HERA. In addition, I will touch on other examples like effects of parton evolution at small momentum fractions, the understanding of events with many particles and many jets and their correlations and the production mechanism of heavy quarks.