Bonn 2001 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
T: Teilchenphysik
T 103: QCD 1
T 103.5: Vortrag
Montag, 26. März 2001, 17:15–17:30, HS XII
Proton Structure Function xF3 from Charged Lepton Scattering — •Burkard Reisert, Vladimir Chekelian, and Ana Dubak — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München
Inclusive 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 and 1999 with a center-of-mass energy of 320 GeV and correspond to an integrated luminosity of 16.4 pb−1. The data are compared with recent measurements of the inclusive neutral current e+p cross sections. Clear evidence is observed for an asymmetry between e−p and e+p neutral current scattering and the structure function xF3 is extracted. The Standard Model predictions are found to be in good agreement with data. A sum rule is derived for the structure function xF3γ Z measured in charged lepton scattering which is the analogue of the Gross Llewellyn-Smith sum rule for neutrino nucleon scattering.