Measurement of neutral current e±p cross sections at high Bjorken x with the ZEUS detector

29 Apr 2014, 09:16
Auditorium (BUW)



Oral presentation WG1: Structure Functions and Parton Densities WG1: Structure Functions and Parton Densities


Aharon Levy (Tel Aviv University (IL))


The neutral current $e^\pm p$ cross section has been measured up to values of Bjorken $x\cong 1$ with the ZEUS detector at HERA using an integrated luminosity of 187 ${\rm pb}^{-1}$ of $e^-p$ and 142 ${\rm pb}^{-1}$ of $e^+p$ collisions at $\surd s = 318$ GeV. Differential cross sections in $x$ and $Q^2$, the exchanged boson virtuality, are presented for $Q^2 \geq 725$ GeV$^2$. An improved reconstruction method and greatly increased amount of data allows a finer binning in the high-$x$ region of the neutral current cross section and leads to a measurement with much improved precision compared to a similar earlier analysis. The measurements are compared to Standard Model expectations based on a variety of recent parton distribution functions.

Primary author

Matthew Wing (UCL)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now