In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2018, No. 10 ( 2018-10)
Abstract:
We report measurements of the production of prompt D 0 , D + , D *+ and D s + mesons in Pb–Pb collisions at the centre-of-mass energy per nucleon-nucleon pair $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ s N N = 5.02 TeV, in the centrality classes 0–10%, 30–50% and 60–80%. The D-meson production yields are measured at mid-rapidity (| y | 〈 0 . 5) as a function of transverse momentum ( p T ). The p T intervals covered in central collisions are: 1 〈 p T 〈 50 GeV /c for D 0 , 2 〈 p T 〈 50GeV /c for D + , 3 〈 p T 〈 50GeV /c for D *+ , and 4 〈 p T 〈 16GeV /c for D s + mesons. The nuclear modification factors ( R AA ) for non-strange D mesons (D 0 , D + , D *+ ) show minimum values of about 0.2 for p T = 6–10 GeV /c in the most central collisions and are compatible within uncertainties with those measured at $$ {\sqrt{s}}_{\mathrm{NN}}=2.76 $$ s N N = 2.76 TeV. For D s + mesons, the values of R AA are larger than those of non-strange D mesons, but compatible within uncertainties. In central collisions the average R AA of non-strange D mesons is compatible with that of charged particles for p T 〉 8 GeV /c , while it is larger at lower p T . The nuclear modification factors for strange and non-strange D mesons are also compared to theoretical models with different implementations of in-medium energy loss.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP10(2018)174
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
2027350-2
