Large-pTproduction ofDmesons at the LHCb in the parton Reggeization approach
| Autor: | Anton Karpishkov, Alexandera Shipilova, Vladimir Saleev |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Particle physics Annihilation Meson 010308 nuclear & particles physics Electron–positron annihilation Nuclear Theory High Energy Physics::Phenomenology Parton 01 natural sciences Gluon Distribution function 0103 physical sciences High Energy Physics::Experiment Rapidity Invariant mass Nuclear Experiment 010306 general physics |
| Zdroj: | Physical Review D. 94 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.94.114012 |
| Popis: | The production of $D$ mesons in proton-proton collisions at the LHCb detector is studied. We consider the single production of ${D}^{0}/{\overline{D}}^{0}$, ${D}^{\ifmmode\pm\else\textpm\fi{}}$, ${D}^{*\ifmmode\pm\else\textpm\fi{}}$, and ${D}_{s}^{\ifmmode\pm\else\textpm\fi{}}$ mesons and correlation spectra in the production of $D\overline{D}$ and $DD$ pairs at the $\sqrt{S}=7\text{ }\text{ }\mathrm{TeV}$ and $\sqrt{S}=13\text{ }\text{ }\mathrm{TeV}$. In case of the single $D$-meson production we calculate differential cross sections over transverse momentum ${p}_{T}$ while in the pair $D\overline{D}$, $DD$-meson production the cross sections are calculated over the azimuthal angle difference $\mathrm{\ensuremath{\Delta}}\ensuremath{\varphi}$, rapidity difference $\mathrm{\ensuremath{\Delta}}y$, invariant mass of the pair $M$ and over the ${p}_{T}$ of the one meson from a pair. The cross sections are obtained at the leading order of the parton Reggeization approach using Kimber-Martin-Ryskin unintegrated parton distribution functions in a proton. To describe the $D$-meson production we use universal scale-dependent $c$-quark and gluon fragmentation functions fitted to ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data from CERN LEP1. Our predictions find a good agreement with the LHCb Collaboration data within uncertainties and without free parameters. |
| Databáze: | OpenAIRE |
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