# Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at Low $Q^2$ and x using the H1 Vertex Detector at HERA

Abstract : Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00025593
Contributor : Sabine Starita <>
Submitted on : Wednesday, February 8, 2006 - 5:49:59 PM
Last modification on : Wednesday, September 16, 2020 - 4:23:37 PM

### Citation

A. Aktas, V. Andreev, T. Anthonis, S. Aplin, A. Asmone, et al.. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at Low $Q^2$ and x using the H1 Vertex Detector at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2006, 45, pp.23-33. ⟨10.1140/epjc/s2005-02415-6⟩. ⟨in2p3-00025593⟩

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