Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 6: Eingeladene Vorträge I

T 6.3: eingeladener Vortrag

Dienstag, 16. März 2010, 15:10–15:45, HG X

Physics of gluons and heavy quarks from HERA to the LHC — •Katerina Lipka — DESY, Notkestrasse 85, 22607 Hamburg, Deutschland

Correct description of the gluon density distribution in the proton is a key issue for LHC physics. Precise knowledge of the parton distribution functions in the proton is provided by the QCD analysis of HERA measurements of inclusive neutral current and charged current cross sections in electron-proton scattering. Treatment of heavy quarks within a QCD analysis is one of the central issues in the determination of the parton densities. At HERA heavy quarks (charm and beauty) are produced predominantly in photon-gluon fusion, with gluon being always directly involved. This is an advantage of such a process in comparison to measurements of inclusive cross sections in deep inelastic scattering. Recent results on heavy quark physics at HERA will be presented. The combined HERA measurement of the charm contribution to the inclusive proton structure function will be shown and the treatment of heavy quarks in the determination of the parton density functions as well as consequences for the LHC analyses will be discussed.