Measurement and QCD Analysis of Neutral and Charged Current Cross Sections at HERA

The inclusive e(+)p single and double differential cross sections for neutral and charged currentprocesses axe measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a centre-of-mass energy of roots = 319 GeV and correspond to an integrated luminosity of 65.2 pb(-1). The cross sections are measured in the range of four-momentumtransfer squared Q(2) between 100 and 30 000 GeV2 and Bjorken x between 0.0013 and 0.65. The neutral currentanalysis for the new e(+)p data and the earlier e-p data taken in 1998 and 1999 is extended to small energies of the scattered electron and therefore to higher values of inelasticity y, allowing a determination of the longitudinal structure functionF-L at high Q(2) (110 - 700 GeV2). A new measurement of the structure functionx (F) over tilde(3) is obtained using the new e(+)p and previously published e p neutral currentcross section data at high Q(2). These data together with H1 low Q(2) precision data are further used to perform new next-to-leading order QCD analyses in the framework of the Standard Model to extract flavour separated parton distributions in the proton.