Measurement of charm and beauty dijet cross sections in photoproduction at HERA using the H1 vertex detector
Research output: Contribution to journal › Article
A measurement of charm and beauty dijet photoproduction cross sections at the ep collider HERA is presented. Events are selected with two or more jets of transverse momentum Pt > 11(8) GeV in the central range of pseudo-rapidity -0.9 <eta (jet1(2))< 1.3. 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 HI central vertex detector. Differential dijet cross sections for charm and beauty, and their relative contributions to the flavour inclusive dijet photoproduction cross section, are measured as a function of the transverse momentum of the leading jet, the average pseudorapidity of the two jets and the observable chi(obs)(gamma). Taking into account the theoretical uncertainties, the charm cross sections are consistent with a QCD calculation in next-to-leading order, while the predicted cross sections for beauty production are somewhat lower than the measurement.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||European Physical Journal C. Particles and Fields|
|Publication status||Published - 2006|