par Aktas, Adil;Favart, Laurent ;Janssen, Xavier ;Marage, Pierre ;Roland, Benoît ; [et al.]
Référence European Physical Journal C. Particles and Fields, 40, 3, page (349-359)
Publication Publié, 2005
Article révisé par les pairs
Résumé : Measurements are presented of inclusive charm and beauty cross sections in e + p collisions at HERA for values of photon virtuality Q 2 > 150 GeV2 and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions 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. The data are divided into four regions in Q 2 and Bjorken x, and values for the structure functions F 2 cc̄ and F2 bb̄ are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics. © Springer-Verlag /Societa Italiana di Fisica 2005.