Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV
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PhysRevD.95.092006.pdf
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Author(s)
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
May 2017
Journal
Physical review D
Publisher
American Physical Society (APS)
Citation
Aaltonen, T., et al., "Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV." Physical review D 95 (2017): no. 092006 doi 10.1103/PHYSREVD.95.092006 ©2017 Author(s)
Version
Final published version
Abstract
We report on a measurement of the D+-meson production cross section as a function of transverse momentum (pT) in proton-antiproton (pp) collisions at 1.96 TeV center-of-mass energy, using the full data set collected by the Collider Detector at Fermilab in Tevatron Run II and corresponding to 10 fb-1 of integrated luminosity. We use D+→K-π+π+ decays fully reconstructed in the central rapidity region |y|<1 with transverse momentum down to 1.5 GeV/c, a range previously unexplored in pp collisions. Inelastic pp-scattering events are selected online using minimally biasing requirements followed by an optimized offline selection. The K-π+π+ mass distribution is used to identify the D+ signal, and the D+ transverse impact-parameter distribution is used to separate prompt production, occurring directly in the hard-scattering process, from secondary production from b-hadron decays. We obtain a prompt D+ signal of 2950 candidates corresponding to a total cross section σ(D+,1.5
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVD.95.092006
