期刊
EUROPEAN PHYSICAL JOURNAL C
卷 45, 期 1, 页码 23-33出版社
SPRINGER
DOI: 10.1140/epjc/s2005-02415-6
关键词
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资金
- Science and Technology Facilities Council [PP/E000444/1] Funding Source: researchfish
Measurements are presented of inclusive charm and beauty cross sections in e(+)p collisions at HERA for values of photon virtuality 12 <= Q(2) = 60 GeV2 and of the Bjorken scaling variable 0.0002 <= x <= 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(cc) and F-2(bb) are obtained. This is the first measurement of F-2(bb) in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and with previous measurements of F-2(cc).
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