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D-meson production in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV and in pp collisions at $\sqrt{s}=7$ TeV

The ALICE collaboration
No Journal Information, 2016

Abstract (data abstract)
CERN-LHC. The production cross sections of the prompt charmed mesons D$^0$, D$^+$, D$^{*+}$ and D$_s$ were measured at mid-rapidity in p-Pb collisions at a centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}=5.02$ TeV with the ALICE detector at the LHC. D mesons were reconstructed from their decays D$^0\rightarrow{\rm K}^-\pi^+$, D$^+\rightarrow{\rm K}^-\pi^+\pi^+$, D$^{*+}\rightarrow D^0\pi^+$, D$_s^+\rightarrow\phi\pi^+\rightarrow{\rm K}^-{\rm K}^+\pi^+$, and their charge conjugates. The $p_{\rm T}$-differential production cross sections were measured at mid-rapidity in the interval $1<p_{\rm T}<24$ GeV/$c$ for D$^0$, D$^+$ and D$^{*+}$ mesons and in $2<p_{\rm T}<12$ GeV/$c$ for D$_s$ mesons, using an analysis method based on the selection of decay topologies displaced from the interaction vertex. The production cross sections of the D$^0$, D$^+$ and D$^{*+}$ mesons were also measured in three $p_{\rm T}$ intervals as a function of the rapidity $y_{\rm cms}$ in the centre-of-mass system in $-1.26<y_{\rm cms}<0.34$. In addition, the prompt D$^0$ cross section was measured in pp collisions at $\sqrt{s}=7$ TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV down to $p_{\rm T}=0$ using an analysis technique that is based on the estimation and subtraction of the combinatorial background, without reconstruction of the D$^0$ decay vertex. The nuclear modification factor $R_{\rm pPb}(p_{\rm T})$, defined as the ratio of the $p_{\rm T}$-differential D-meson cross section in p-Pb collisions and that in pp collisions scaled by the mass number of the Pb nucleus, was calculated for the four D-meson species and found to be compatible with unity within experimental uncertainties. The results are compared to theoretical calculations that include cold-nuclear-matter effects and to transport model calculations incorporating the interactions of charm quarks with an expanding deconfined medium.

  • Table 1

    Data from Figure 8

    10.17182/hepdata.73941.v1/t1

    pT-differential cross section of inclusive Dzero mesons in pp collisions at sqrt{sNN}=7 TeV in the rapidity interval |y|<0.5. Branching ratio...

  • Table 2

    Data from Figure 9

    10.17182/hepdata.73941.v1/t2

    pT-differential cross section of prompt Dzero mesons in pp collisions at sqrt{sNN}=7 TeV in the rapidity interval |y|<0.5. Branching ratio...

  • Table 3

    Data from Equations 7,8,9,10,11,12

    10.17182/hepdata.73941.v1/t3

    First column: production cross sections per unit of rapidity for prompt D0 mesons, inclusive D0 mesons (no feed-down subtraction) and...

  • Table 4

    Data from Figure 11

    10.17182/hepdata.73941.v1/t4

    pT-differential cross section of inclusive Dzero mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV in the rapidity interval -0.96<y<0.04. Branching ratio...

  • Table 5

    Data from Figure 12

    10.17182/hepdata.73941.v1/t5

    pT-differential cross section of prompt Dzero mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV in the rapidity interval -0.96<y<0.04. Branching ratio...

  • Table 6

    Data from Equations 13,14,15,16

    10.17182/hepdata.73941.v1/t6

    First column: production cross sections per unit of rapidity for prompt D0 mesons, inclusive D0 mesons (no feed-down subtraction) and...

  • Table 7

    Data from Figure 13

    10.17182/hepdata.73941.v1/t7

    Ratio of D+ to D0 meson yield in p-Pb collisions at sqrt{sNN}=5.02 TeV in -0.96<y< 0.04 as a function of...

  • Table 8

    Data from Figure 13

    10.17182/hepdata.73941.v1/t8

    Ratio of D*+ to D0 meson yield in p-Pb collisions at sqrt{sNN}=5.02 TeV in -0.96<y< 0.04 as a function of...

  • Table 9

    Data from Figure 13

    10.17182/hepdata.73941.v1/t9

    Ratio of Ds to D0 meson yield in p-Pb collisions at sqrt{sNN}=5.02 TeV in -0.96<y< 0.04 as a function of...

  • Table 10

    Data from Figure 13

    10.17182/hepdata.73941.v1/t10

    Ratio of Ds to D+ meson yield in p-Pb collisions at sqrt{sNN}=5.02 TeV in -0.96<y< 0.04 as a function of...

  • Table 11

    Data from Figure 14

    10.17182/hepdata.73941.v1/t11

    cross section of prompt Dzero mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 2<pt<5 GeV/c....

  • Table 12

    Data from Figure 14

    10.17182/hepdata.73941.v1/t12

    cross section of prompt Dzero mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 5<pt<8 GeV/c....

  • Table 13

    Data from Figure 14

    10.17182/hepdata.73941.v1/t13

    cross section of prompt Dzero mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 8<pt<16 GeV/c....

  • Table 14

    Data from Figure 14

    10.17182/hepdata.73941.v1/t14

    cross section of prompt Dplus mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 2<pt<5 GeV/c....

  • Table 15

    Data from Figure 14

    10.17182/hepdata.73941.v1/t15

    cross section of prompt Dplus mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 5<pt<8 GeV/c....

  • Table 16

    Data from Figure 14

    10.17182/hepdata.73941.v1/t16

    cross section of prompt Dplus mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 8<pt<16 GeV/c....

  • Table 17

    Data from Figure 14

    10.17182/hepdata.73941.v1/t17

    cross section of prompt Dstar mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 2<pt<5 GeV/c....

  • Table 18

    Data from Figure 14

    10.17182/hepdata.73941.v1/t18

    cross section of prompt Dstar mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 5<pt<8 GeV/c....

  • Table 19

    Data from Figure 14

    10.17182/hepdata.73941.v1/t19

    cross section of prompt Dstar mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV vs rapidity in the pt interval 8<pt<16 GeV/c....

  • Table 20

    Data from Figure 16

    10.17182/hepdata.73941.v1/t20

    Nuclear modification factor RpPb of D0 mesons in p-Pb collisions at sqrt{sNN}=5.02 TeV in -0.96<y<0.04 as a function of pT....

  • Table 21

    Data from Equation 18

    10.17182/hepdata.73941.v1/t21

    Pt-integrated nuclear modification factor RpA of prompt D0 mesons in -0.96 < ycm < 0.04. The first error is the...

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