# EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

## Combination of D* Differential Cross-SectionMeasurements in Deep-Inelastic ep Scattering at HERA

Jul 24, 2015, 9:15 AM
15m
HS32

### Speaker

H1 and ZEUS have published single-differential cross sections for inclusive $D^{\star}$ meson production in deep-inelastic ep scattering at HERA from their respective final data sets. These cross sections are combined in the common visible phase space region of photon virtuality $Q^2>$5 GeV², electron inelasticity $0.02 < y< 0.7$ and the $D^{\star}$ meson's transverse momentum $p_{T}(D^{\star})> 1.5$ GeV and pseudorapidity $\vert\eta(D^{\star})\vert< 1.5$. The combination procedure takes into account all relevant correlations yielding significantly reduced experimental uncertainties. To extend the kinematic range down to $Q^2< 1.5$ GeV², double-differential cross sections are also combined with a subset of earlier $D^{\star}$ data. Perturbative next-to-leading order QCD predictions are compared to the results.