Measurement of neutral current cross sections at high Bjorken-x with the ZEUS detector at HERA

A new method is employed to measure the neutral current cross section up to Bjorken-x values of one with the ZEUS detector at HERA using an integrated luminosity of 65.1 pb-1 for e+p collisions and 16.7 pb-1 for e-p collisions at sqrt{s}=318 GeV and 38.6 pb-1 for e+p collisions at sqrt{s}=300 GeV. Cross sections have been extracted for Q2 >= 648 GeV2 and are compared to predictions using different parton density functions. For the highest x bins, the data have a tendency to lie above the expectations using recent parton density function parametrizations.

Note:

13 pages, 14 figures, 6 tables, DESY-06-116, submitted to Eur. Phys. Journal C

electron p: colliding beams
positron p: colliding beams
electron p: deep inelastic scattering
neutral current
momentum transfer: high
differential cross section: x-dependence
p: structure function
parton: momentum spectrum
data analysis method
ZEUS

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