Measurement of beauty photoproduction near threshold using di-electron events with the H1 detector at HERA
H1 Collaboration (ukupan broj autora: 197)
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The cross section for ep - GT eb (b) over barX in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel b (b) over bar - GT eeX is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q(2) LT = 1 GeV2, the inelasticity 0.05 LT = y LT = 0.65 and the pseudorapidity of the b-quarks vertical bar eta(b)vertical bar, vertical bar eta((b) over bar)vertical bar LT = 2. The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks LT P-T(b) GT down to the threshold. The results are compared to next-to-leading-order QCD predictions.
Извор:European Physical Journal C. Particles and Fields, 2012, 72, 10
- 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], 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], Romanian National Authority for Scientific Research [PN 09370101], Ministry of Science of Montenegro [05-1/3-3352], DESY directorate