In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2019, No. 12 ( 2019-12)
Abstract:
The measurement of the production of prompt D 0 , D + , D *+ , and $$ {\mathrm{D}}_{\mathrm{S}}^{+} $$ D S + mesons in proton–lead (p–Pb) collisions at the centre-of-mass energy per nucleon pair of $$ \sqrt{s_{\mathrm{NN}}} $$ s NN = 5 . 02 TeV, with an integrated luminosity of 292 ± 11 μ b − 1 , are reported. Differential production cross sections are measured at mid-rapidity ( − 0 . 96 〈 y cms 〈 0 . 04) as a function of transverse momentum ( p T ) in the intervals 0 〈 p T 〈 36 GeV /c for D 0 , 1 〈 p T 〈 36 GeV /c for D + and D *+ , and 2 〈 p T 〈 24 GeV /c for D + mesons. For each species, the nuclear modification factor R pPb is calculated as a function of p T using a proton-proton (pp) ref- erence measured at the same collision energy. The results are compatible with unity in the whole p T range. The average of the non-strange D mesons R pPb is compared with theoretical model predictions that include initial-state effects and parton transport model predictions. The p T dependence of the D 0 , D + , and D *+ nuclear modification factors is also reported in the interval 1 〈 p T 〈 36 GeV /c as a function of the collision centrality, and the central-to-peripheral ratios are computed from the D-meson yields measured in different centrality classes. The results are further compared with charged-particle measurements and a similar trend is observed in all the centrality classes. The ratios of the p T -differential cross sections of D 0 , D + , D *+ , and $$ {\mathrm{D}}_{\mathrm{S}}^{+} $$ D S + mesons are also reported. The $$ {\mathrm{D}}_{\mathrm{S}}^{+} $$ D S + and D + yields are compared as a function of the charged-particle multiplicity for several p T intervals. No modification in the relative abundances of the four species is observed with respect to pp collisions within the statistical and systematic uncertainties.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP12(2019)092
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2019
detail.hit.zdb_id:
2027350-2
