<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b"^^ . "In this thesis, the data taken with the HERA-b detector in the running period 2002/2003 is used to measure the cross section of the Drell Yan process, where quark and antiquark annihilate and produce a lepton pair. HERA-b, a fixed target spectrometer, is one of the four experiments at the storage ring HERA at DESY. It uses the proton beam to produce collisions with wire targets of different materials. The main challenge of the thesis is to extract a Drell Yan signal from the dataset without loosing too many events and to find a suitable background simulation which can be subtracted from the kinematical distributions. For this purpose, a Single Track Monte Carlo is generated to calculate event weights, which are applied to the likesign dataset. This procedure is necessary since the detector acceptance of HERA-b is dependant on the charges of the leptons. After background subtraction and acceptance and luminosity corrections, differential cross sections of the Drell Yan process are plotted, for the first time in the negative xf regime. These are compared to results from E772 and NA50. Also, the dependance of the Drell Yan cross section on the mass number of the target material is calculated."^^ . "2007" . . . . . . . . "Jens"^^ . "Kessler"^^ . "Jens Kessler"^^ . . . . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (PDF)"^^ . . . "diss_jkessler_07.pdf"^^ . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Search for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #7791 \n\nSearch for Drell Yan in squareroot s = 41.6 GeV p-N Collisions at HERA-b\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .