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

Collaboration
Feb 23, 2016
39 pages
Published in:
  • JHEP 08 (2016) 078
  • Published: Aug 11, 2016
e-Print:
Report number:
  • CERN-EP-2016-034
Experiments:

Citations per year

20162018202020222024024681012
Abstract: (Springer)
The measurement of prompt D-meson production as a function of multiplicity in p-Pb collisions at sNN=5.02 \sqrt{s_{\mathrm{NN}}}=5.02 TeV with the ALICE detector at the LHC is reported. D0^{0}, D+^{+} and D+^{∗+} mesons are reconstructed via their hadronic decay channels in the centre-of-mass rapidity range −0.96 < ycms_{cms} < 0.04 and transverse momentum interval 1T_{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 D0^{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 pT_{T} regions and event classes. The relative D-meson yields, calculated in various pT_{T} intervals, increase as a function of the charged-particle multiplicity. The results are compared with the equivalent pp measurements at s=7 \sqrt{s}=7 TeV as well as with EPOS 3 calculations.
Note:
  • Heavy Ion Experiments
  • Heavy-ion collision
  • Quark gluon plasma
  • meson: production
  • direct production
  • multiplicity: difference
  • charged particle: multiplicity
  • hadron: charged particle
  • multiplicity: dependence
  • p p: scattering