Measurements of the heavy-flavour nuclear modification factor in p--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV with ALICE at the LHC

Abstract

The heavy-flavour nuclear modification factor $R_{\mathrm{pPb}}$ has been measured with the ALICE detector in p--Pb collisions at the nucleon--nucleon center of mass energy $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at the CERN LHC in a wide rapidity and transverse momentum range, as well as in several decay channels. $R_{\mathrm{pPb}}$ is consistent with unity within uncertainties at mid-rapidity and forward rapidity. In the backward region a slight enhancement of the yield of heavy-flavour decay muons is found in the region $2<p_{\mathrm{T}}<4$ GeV/$c$. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurements add experimental evidence that the suppression of heavy-flavour production observed at high $p_{\mathrm{T}}$ in central Pb--Pb collisions with respect to pp collisions is due to a medium effect induced by the interaction of heavy quarks with the partonic matter.

4 pages, 6 figures, submitted to NPA

References in corpus (4)

• A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
• Reference heavy flavour cross sections in pp collisions at sqrt(s) = 2.76 TeV, using a pQCD-driven sqrt(s)-scaling of ALICE measurements at sqrt(s) = 7 TeV
• Production of $\pi$/K/p from intermediate to high $p_{\mathrm{T}}$ in pp, p-Pb and Pb-Pb collisions measured by ALICE
• Measurements of electrons from heavy-flavour hadron decays in pp, p-Pb and Pb-Pb collisions with ALICE at the LHC

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• Overview of ALICE Results at Quark Matter 2014
• Charm-strange meson production in ultra-relativistic heavy-ion collisions at the CERN-LHC energies
• Heavy-flavour production and nuclear modification factor in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=2.76 TeV with ALICE
• Measurement of heavy-flavour production as a function of multiplicity in pp and p-Pb collisions with ALICE
• Experimental Results on p(d)+A Collisions at RHIC and the LHC
• Measurements of heavy-flavour production and azimuthal anisotropy in Pb--Pb collisions with the ALICE detector