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Measurement of D-meson production versus multiplicity in p-Pb collisions at $ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02 $ TeV

The ALICE collaboration
JHEP 1608 (2016) 078, 2016

Abstract (data abstract)
CERN-LHC. The measurement of prompt D-meson production as a function of multiplicity in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with the ALICE detector at the LHC is reported. D$^0$, D$^+$ and D$^{*+}$ mesons are reconstructed via their hadronic decay channels in the centre-of-mass rapidity range $-0.96< y_{\mathrm{cms}}<0.04$ and transverse momentum interval $1 < p_{\rm T} < 24$ GeV/$c$. The multiplicity dependence of D-meson production is examined by either comparing yields in p-Pb collisions in different event classes, selected based on the multiplicity of produced particles or zero-degree energy, with those in pp collisions, scaled by the number of binary nucleon-nucleon collisions (nuclear modification factor); as well as by evaluating the per-event yields in p-Pb collisions in different multiplicity intervals normalised to the multiplicity-integrated ones (relative yields). The nuclear modification factors for D$^0$, D$^+$ and D$^{*+}$ are consistent with one another. The D-meson nuclear modification factors as a function of the zero-degree energy are consistent with unity within uncertainties in the measured $p_{\rm T}$ regions and event classes. The relative D-meson yields, calculated in various $p_{\rm T}$ intervals, increase as a function of the charged-particle multiplicity. The results are compared with the equivalent pp measurements at $\sqrt{s}=7$ TeV as well as with EPOS 3 calculations.

  • Table 1

    Data from Figure 3 and Table A.1

    10.17182/hepdata.73775.v1/t1

    Average $Q_{\rm pPb}$ of D$^{0}$, D$^{+}$ and D*$^{+}$ mesons for the sum of particles and antiparticles in several multiplicity and...

  • Table 2

    Data from Figure 4 and Table A.2

    10.17182/hepdata.73775.v1/t2

    Average $Q_{\rm pPb}$ of D$^{0}$, D$^{+}$ and D*$^{+}$ mesons for the sum of particles and antiparticles in several multiplicity and...

  • Table 3

    Data from Figure 4 and Table A.3

    10.17182/hepdata.73775.v1/t3

    Average $Q_{\rm pPb}$ of D$^{0}$, D$^{+}$ and D*$^{+}$ mesons for the sum of particles and antiparticles in several multiplicity and...

  • Table 4

    Data from Figure 7 and Table A.4

    10.17182/hepdata.73775.v1/t4

    Average of relative D$^{0}$, D$^{+}$ and D*$^{+}$ meson yields for the sum of particles and antiparticles in several multiplicity and...

  • Table 5

    Data from Figure 8 and Table A.5

    10.17182/hepdata.73775.v1/t5

    Average of relative D$^{0}$, D$^{+}$ and D*$^{+}$ meson yields for the sum of particles and antiparticles in several multiplicity and...

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