Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV
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...
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| Format: | Article |
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American Physical Society (APS)
2020
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| Online Access: | https://hdl.handle.net/1721.1/124737 |
| _version_ | 1826193568635551744 |
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| author | Goncharov, Maxim Paus, Christoph M. E. |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Goncharov, Maxim Paus, Christoph M. E. |
| author_sort | Goncharov, Maxim |
| collection | MIT |
| description | 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<pT<14.5 GeV/c,|y|<1)=71.9±6.8(stat)±9.3(syst) μb. While the measured cross sections are consistent with theoretical estimates in each pT bin, the shape of the observed pT spectrum is softer than the expectation from quantum chromodynamics. The results are unique in pp collisions and can improve the shape and uncertainties of future predictions. ©2017 |
| first_indexed | 2024-09-23T09:41:30Z |
| format | Article |
| id | mit-1721.1/124737 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T09:41:30Z |
| publishDate | 2020 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1247372022-09-30T16:12:39Z Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV Goncharov, Maxim Paus, Christoph M. E. Massachusetts Institute of Technology. Laboratory for Nuclear Science Massachusetts Institute of Technology. Department of Physics 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<pT<14.5 GeV/c,|y|<1)=71.9±6.8(stat)±9.3(syst) μb. While the measured cross sections are consistent with theoretical estimates in each pT bin, the shape of the observed pT spectrum is softer than the expectation from quantum chromodynamics. The results are unique in pp collisions and can improve the shape and uncertainties of future predictions. ©2017 2020-04-17T19:57:44Z 2020-04-17T19:57:44Z 2017-05 2016-10 2018-08-29T13:13:45Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 https://hdl.handle.net/1721.1/124737 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) 10.1103/PHYSREVD.95.092006 Physical review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Goncharov, Maxim Paus, Christoph M. E. Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title | Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title_full | Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title_fullStr | Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title_full_unstemmed | Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title_short | Measurement of the D+ -meson production cross section at low transverse momentum in pp̄ collisions at √s p = 1.96 TeV |
| title_sort | measurement of the d meson production cross section at low transverse momentum in pp collisions at √s p 1 96 tev |
| url | https://hdl.handle.net/1721.1/124737 |
| work_keys_str_mv | AT goncharovmaxim measurementofthedmesonproductioncrosssectionatlowtransversemomentuminppcollisionsatsp196tev AT pauschristophme measurementofthedmesonproductioncrosssectionatlowtransversemomentuminppcollisionsatsp196tev |