Measurement of inclusive and dijet D* meson cross sections in photoproduction at HERA
H1 Collaboration (ukupan broj autora: 204)
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The inclusive photoproduction of D* mesons and of D*-tagged dijets is investigated with the H1 detector at the ep collider HERA. The kinematic region covers small photon virtualities Q(2) LT 2 GeV2 and photon-proton centre-of-mass energies of 100 LT W-gamma p LT 285 GeV. Inclusive D* meson differential cross sections are measured for central rapidities vertical bar eta(D*)vertical bar LT 1.5 and transverse momenta p(T) (D*) GT 1.8 GeV. The heavy quark production process is further investigated in events with at least two jets with transverse momentum p(T) (jet) GT 3.5 GeV each, one containing the D* meson. Differential cross sections for D*-tagged dijet production and for correlations between the jets are measured in the range vertical bar eta(D*)vertical bar LT 1.5 and p(T) (D*) GT 2.1 GeV. The results are compared with predictions from Monte Carlo simulations and next-to-leading order perturbative QCD calculations.
Извор:European Physical Journal C. Particles and Fields, 2012, 72, 5
- Helmholtz Association (HGF) [VH-NG-401], Bundesministerium fur Bildung und Forschung, FRG [05H09GUF, 05H09VHC, 05H09VHF, 05H16PEA], UK Science and Technology Facilities Council, UK Particle Physics and Astronomy Research Council, FNRS-FWO-Vlaanderen, IISN-IIKW, IWT, Interuniversity Attraction Poles Programme, Belgian Science Policy, Polish Ministry of Science and Higher Education [DPN/N168/DESY/2009], Deutsche Forschungsgemeinschaft, VEGA SR [2/7062/27], Swedish Natural Science Research Council, Ministry of Education of the Czech Republic [LC527, INGO-LA09042, MSM0021620859], Swiss National Science Foundation, CONACYT, Mexico [48778-F], Russian Foundation for Basic Research (RFBR) [1329.2008.2], European Social Fund, National Resources-(EPEAEK II)-PYTHAGORAS II, Romanian National Authority for Scientific Research [PN 09370101], Ministry of Science of Montenegro [05-1/3-3352], DESY directorate