Abstract |
The inclusive charm and beauty cross sections are measured
in $e^-p$ and $e^+p$ collisions at HERA II in the kinematic region of
photon virtuality $5 \le Q^2 \le 650~{
m GeV}^2$ and Bjorken
scaling variable $0.0002 \le x \le 0.032$. The data were collected
with the H1 detector in 2006 and 2007 corresponding to an integrated
luminosity of 189~${
m pb^{-1}}$. The charm and beauty fractions
are determined using a neural network which includes inputs, as
measured by the H1 vertex detector, of the impact parameter of tracks
to the primary vertex and the position of the secondary vertex. The
measurements are compared with previous data, NLO and NNLO QCD predictions. |