Bonn 2001 – scientific programme
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T: Teilchenphysik
T 203: QCD 2
T 203.4: Talk
Tuesday, March 27, 2001, 14:45–15:00, HS XII
Longitudinal Structure Function FL at High Q2 — •Ana Dubak, Vladimir Chekelian, and Burkard Reisert — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München
Inclusive e−p and e+p cross sections for neutral current processes are measured with the H1 detector at HERA in the range of four-momentum transfer squared, Q2, between 100 and 30000 GeV2 and Bjorken x between 0.0013 and 0.65. The data were taken in 1998-1999 (e−p) and 1999-2000 (e+p) with a center-of-mass energy of 320 GeV and correspond to an integrated luminosity of 16.4 pb−1 and 65.4 pb−1, respectively. An extension of the cross section measurement to the high inelasticity region (y = 0.75) makes possible a measurement of the longitudinal structure function FL in the Q2 range from 100 to 800 GeV2. The results are well described by the QCD prediction.