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Measurement of D-meson production versus multiplicity in p-Pb collisions at √sNN=5.02 TeV
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Measurement of D-meson production versus multiplicity in p-Pb collisions at √sNN=5.02 TeV

J. Adam, D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, A. Akindinov, …
Journal of High Energy Physics, 卷.2016(8), 78
08/2016

摘要

Heavy Ion Experiments Heavy-ion collision Quark gluon plasma Nuclear and High Energy Physics
The measurement of prompt D-meson production as a function of multiplicity in p-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC is reported. D <sup>0</sup> , D <sup>+</sup> and D <sup>∗+</sup> mesons are reconstructed via their hadronic decay channels in the centre-of-mass rapidity range −0.96 < y <sub>cms</sub> < 0.04 and transverse momentum interval 1<p <sub>T</sub> <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 <sup>0</sup> , D <sup>+</sup> and D <sup>∗+</sup> 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 <sub>T</sub> regions and event classes. The relative D-meson yields, calculated in various p <sub>T</sub> intervals, increase as a function of the charged-particle multiplicity. The results are compared with the equivalent pp measurements at s=7 TeV as well as with EPOS 3 calculations.[Figure not available: see fulltext.]

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https://doi.org/10.1007/JHEP08(2016)078檢視
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