Measurement of $${{\mathrm{D}}^0}$$, $${{\mathrm{D}}^+}$$, $${{\mathrm{D}}^{*+}}$$ and $${{\mathrm{D}}^+_{\mathrm{s}}}$$ production in pp collisions at $${\sqrt{{\textit{s}}}~=~5.02~{\text {TeV}}}$$ with ALICE
The measurements of the production of prompt D0, D+, D*+, and D$$_s^+$$ mesons in proton–proton (pp) collisions at $$\sqrt{s}$$=5.02 TeV with the ALICE detector at the Large Hadron Collider (LHC) are reported. D mesons were reconstructed at mid-rapidity (|y| < 0.5) via their hadronic decay channels D0 → K- $$π$$+, D+ → K- $$π$$+ $$π$$+, D*+ → D0$$π$$+ → K- $$π$$ + $$π$$ +, D$$_s^+$$ → Φ$$π$$+ → K+K- $$π$$+, and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0 < $$p$$T < 36 GeV/$$c$$ for D0, 1 < $$p$$T < 36 GeV/$$c$$ for D+ and D*+, and in 2 < $$p$$T < 24 GeV/$$c$$ for D$$_s^+$$ mesons. Thanks to the higher integrated luminosity, an analysis in finer $$p$$T bins with respect to the previous measurements at $$\sqrt{s}$$ = 7 TeV was performed, allowing for a more detailed description of the cross-section $$p$$T shape. The measured $$p$$T differential production cross sections are compared to the results at √ s = 7 TeV and to four different perturbative QCD calculations. Its rapidity dependence is also tested combining the ALICE and LHCb measurements in pp collisions at $$\sqrt{s}$$ = 5.02 TeV. This measurement will allow for a more accurate determination of the nuclear modification factor in p–Pb and Pb–Pb collisions performed at the same nucleon– nucleon centre-of-mass energy.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- Contributing Organization:
- ALICE Collaboration
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725
- OSTI ID:
- 1546681
- Journal Information:
- European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 5 Vol. 79; ISSN 1434-6044
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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