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Charm production and fragmentation fractions at midrapidity in pp collisions at $\sqrt{s} = 13$ TeV

The ALICE collaboration
Acharya, Shreyasi , Adamova, Dagmar , Aglieri Rinella, Gianluca , Agnello, Michelangelo , Agrawal, Neelima , Ahammed, Zubayer , Ahmad, Shakeel , Ahn, Sang Un , Ahuja, Ishaan , Akindinov, Alexander
JHEP 12 (2023) 086, 2023.
https://doi.org/10.17182/hepdata.145759

Abstract (data abstract)
Measurements of the production cross sections of prompt $\mathrm{D}^0$, $\mathrm{D}^+$, $\mathrm{D}^{*+}$, $\mathrm{D}^+_\mathrm{c}$, $\Lambda^+_\mathrm{c}$, and $\Xi^+_\mathrm{c}$ charm hadrons at midrapidity in proton$-$proton collisions at $\sqrt{s}=13$ TeV with the ALICE detector are presented. The D-meson cross sections as a function of transverse momentum ($p_\mathrm{T}$) are provided with improved precision and granularity. The ratios of $p_\mathrm{T}$-differential meson production cross sections based on this publication and on measurements at different rapidity and collision energy provide a constraint on gluon parton distribution functions at low values of Bjorken-$x$ ($10^{-5}-10^{-4}$). The measurements of $\Lambda^+_\mathrm{c}$ ($\Xi^+_\mathrm{c}$) baryon production extend the measured $p_\mathrm{T}$ intervals down to $p_\mathrm{T}=0(3)$~GeV$/c$. These measurements are used to determine the charm-quark fragmentation fractions and the $\mathrm{c}\bar{\mathrm{c}}$ production cross section at midrapidity ($|y|<0.5$) based on the sum of the cross sections of the weakly-decaying ground-state charm hadrons $\mathrm{D}^0$, $\mathrm{D}^+$, $\mathrm{D}^+_\mathrm{c}$, $\Lambda^+_\mathrm{c}$, $\Xi^0_\mathrm{c}$ and, for the first time, $\Xi^+_\mathrm{c}$, and of the strongly-decaying $J/\psi$ mesons. The first measurements of $\Xi^+_\mathrm{c}$ and $\Sigma_\mathrm{c}^{0,+,++}$ fragmentation fractions at midrapidity are also reported. A significantly larger fraction of charm quarks hadronising to baryons is found compared to $\mathrm{e}^+\mathrm{e}^-$ and ep collisions. The $\mathrm{c}\bar{\mathrm{c}}$ production cross section at midrapidity is found to be at the upper bound of state-of-the-art perturbative QCD calculations.

  • Figure 4 Dzero pp 13 TeV

    Data from Figure 4 $\mathrm{D}^{0}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t1

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{0}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Branching ratio of $\mathrm{D}^{0}\rightarrow\mathrm{K}^-\pi^+$:...

  • Figure 4 Dplus pp 13 TeV

    Data from Figure 4 $\mathrm{D}^{+}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t2

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Branching ratio of $\mathrm{D}^{+}\rightarrow\mathrm{K}^-\pi^+\pi^+$:...

  • Figure 4 Dstar pp 13 TeV

    Data from Figure 4 $\mathrm{D}^{*+}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t3

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Branching ratio of $\mathrm{D}^{*+}\rightarrow\mathrm{D}^0(\rightarrow\mathrm{K}^-\pi^+)\pi^+$:...

  • Figure 4 Ds pp 13 TeV

    Data from Figure 4 $\mathrm{D}^{+}_\mathrm{s}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t4

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}_\mathrm{s}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Branching ratio of $\mathrm{D}^{+}_\mathrm{s}\rightarrow\phi\pi^+\rightarrow\mathrm{K}^+\mathrm{K}^-\pi^+$:...

  • Figure 6 Lc pp 13 TeV

    Data from Figure 6 $\Lambda_\mathrm{c}^{+}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t5

    $p_{\mathrm{T}}$-differential $\Lambda_\mathrm{c}^{+}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on...

  • Figure 6 Xic pp 13 TeV

    Data from Figure 6 $\Xi_\mathrm{c}^{+}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t6

    $p_{\mathrm{T}}$-differential $\Xi_\mathrm{c}^{+}$ production cross section at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on...

  • Figure 7 Dplus over D0 pp 13 TeV

    Data from Figure 7 $\mathrm{D}^{+}/\mathrm{D}^{0}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t7

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}/\mathrm{D}^{0}$ ratio in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on BR: $1.9\%$

  • Figure 7 Dstar over D0 pp 13 TeV

    Data from Figure 7 $\mathrm{D}^{*+}/\mathrm{D}^{0}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t8

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{*+}/\mathrm{D}^{0}$ ratio in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on BR: $0.7\%$

  • Figure 7 Ds over D0 pp 13 TeV

    Data from Figure 7 $\mathrm{D}^{+}_\mathrm{s}/\mathrm{D}^{0}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t9

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}_\mathrm{s}/\mathrm{D}^{0}$ ratio in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on BR: $2.8\%$

  • Figure 7 Ds over Dplus pp 13 TeV

    Data from Figure 7 $\mathrm{D}^{+}_\mathrm{s}/\mathrm{D}^{+}$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t10

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}_\mathrm{s}/\mathrm{D}^{+}$ ratio in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on BR: $3.2\%$

  • Figure 7 Ds over D0 Dplus pp 13 TeV

    Data from Figure 7 $\mathrm{D}^{+}_\mathrm{s}/(\mathrm{D}^{0}+\mathrm{D}^{+})$, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t11

    $p_{\mathrm{T}}$-differential $\mathrm{D}^{+}_\mathrm{s}/(\mathrm{D}^{0}+\mathrm{D}^{+})$ ratio in pp collisions at $\sqrt{s}$ = 13 TeV Global relative uncertainty on BR: $3.3\%$

  • Figure 8 Lc over D0 left panel pp 13 TeV

    Data from Figure 8 , left panel, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t12

    $\Lambda_\mathrm{c}^{+}/\mathrm{D}^{0}$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 8 Xic+ over D0 right panel pp 13 TeV

    Data from Figure 8 , right panel, pp collisions at $\sqrt{s}$ = 13 TeV

    10.17182/hepdata.145759.v1/t13

    $\Xi_\mathrm{c}^{+}/\mathrm{D}^{0}$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 9 D0 ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\mathrm{D}^{0}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t14

    $\sigma(\mathrm{D}^{0})$ $\sqrt{s}$ = 13 TeV / $\sigma(\mathrm{D}^{0})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Dplus ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\mathrm{D}^{+}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t15

    $\sigma(\mathrm{D}^{+})$ $\sqrt{s}$ = 13 TeV $/ \sigma(\mathrm{D}^{+})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Dstar ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\mathrm{D}^{*+}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t16

    $\sigma(\mathrm{D}^{*+})$ $\sqrt{s}$ = 13 TeV / $\sigma(\mathrm{D}^{*+})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Ds ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\mathrm{D}^{+}_\mathrm{s}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t17

    $\sigma(\mathrm{D}^{+}_\mathrm{s})$ $\sqrt{s}$ = 13 TeV $/ \sigma(\mathrm{D}^{+}_\mathrm{s})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Lc ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\Lambda^{+}_\mathrm{c}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t18

    $\sigma(\Lambda^{+}_\mathrm{c})$ $\sqrt{s}$ = 13 TeV $/ \sigma(\Lambda^{+}_\mathrm{c})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Xic+ ratio pp 13 TeV over Xic0 pp 5.02 TeV

    Data from Figure 9 $\Xi^{+}_\mathrm{c}$ ratio pp 13 TeV over $\Xi^{0}_\mathrm{c}$ pp 5.02 TeV

    10.17182/hepdata.145759.v1/t19

    $\sigma(\Xi^{+}_\mathrm{c})$ $\sqrt{s}$ = 13 TeV $/ \sigma(\Xi^{0}_\mathrm{c})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 9 Xic0 ratio pp 13 TeV over pp 5.02 TeV

    Data from Figure 9 $\Xi^{0}_\mathrm{c}$ ratio pp 13 TeV over pp 5.02 TeV

    10.17182/hepdata.145759.v1/t20

    $\sigma(\Xi^{0}_\mathrm{c})$ $\sqrt{s}$ = 13 TeV / $\sigma(\Xi^{0}_\mathrm{c})$ $\sqrt{s}$ = 5.02 TeV

  • Figure 10 D0 y range 0

    Data from Figure 10, $\mathrm{D}^{0}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t21

    $\mathrm{D}^{0}$ ratio |$y$| < 0.5 / $2 < y < 2.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 D0 y range 1

    Data from Figure 10, $\mathrm{D}^{0}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t22

    $\mathrm{D}^{0}$ ratio |$y$| < 0.5 / $3 < y < 3.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 D0 y range 2

    Data from Figure 10, $\mathrm{D}^{0}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t23

    $\mathrm{D}^{0}$ ratio |$y$| < 0.5 / $4 < y < 4.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dplus y range 0

    Data from Figure 10, $\mathrm{D}^{+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t24

    $\mathrm{D}^{+}$ ratio |$y$| < 0.5 / $2 < y < 2.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dplus y range 1

    Data from Figure 10, $\mathrm{D}^{+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t25

    $\mathrm{D}^{+}$ ratio |$y$| < 0.5 / $3 < y < 3.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dplus y range 2

    Data from Figure 10, $\mathrm{D}^{+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t26

    $\mathrm{D}^{+}$ ratio |$y$| < 0.5 / $4 < y < 4.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dstar y range 0

    Data from Figure 10, $\mathrm{D}^{*+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t27

    $\mathrm{D}^{*+}$ ratio |$y$| < 0.5 / $2 < y < 2.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dstar y range 1

    Data from Figure 10, $\mathrm{D}^{*+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t28

    $\mathrm{D}^{*+}$ ratio |$y$| < 0.5 / $3 < y < 3.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Dstar y range 2

    Data from Figure 10, $\mathrm{D}^{*+}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t29

    $\mathrm{D}^{*+}$ ratio |$y$| < 0.5 / $4 < y < 4.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Ds y range 0

    Data from Figure 10, $\mathrm{D}^{+}_\mathrm{s}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t30

    $\mathrm{D}^{+}_\mathrm{s}$ ratio |$y$| < 0.5 / $2 < y < 2.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Ds y range 1

    Data from Figure 10, $\mathrm{D}^{+}_\mathrm{s}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t31

    $\mathrm{D}^{+}_\mathrm{s}$ ratio |$y$| < 0.5 / $3 < y < 3.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 10 Ds y range 2

    Data from Figure 10, $\mathrm{D}^{+}_\mathrm{s}$ pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t32

    $\mathrm{D}^{+}_\mathrm{s}$ ratio |$y$| < 0.5 / $4 < y < 4.5$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 11 y range 0

    Data from Figure 11 , pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t33

    Double ratio $\mathrm{D}^{0}$ 13 TeV / 5.02 TeV |$y$| < 0.5 / $2 < y < 2.5$ in pp collisions...

  • Figure 11 y range 1

    Data from Figure 11 , pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t34

    Double ratio $\mathrm{D}^{0}$ 13 TeV / 5.02 TeV |$y$| < 0.5 / $3 < y < 3.5$ in pp collisions...

  • Figure 11 y range 2

    Data from Figure 11 , pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t35

    Double ratio $\mathrm{D}^{0}$ 13 TeV / 5.02 TeV |$y$| < 0.5 / $4 < y < 4.5$ in pp collisions...

  • Figure 12 pp 13 TeV

    Data from Figure 12 , pp collisions at $\sqrt{s}=13$ TeV

    10.17182/hepdata.145759.v1/t36

    Charm $f_\mathrm{s}/(f_\mathrm{u}+f_\mathrm{d})$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 13 Left pp 13 TeV

    Data from Figure 13 (left panel)

    10.17182/hepdata.145759.v1/t37

    $f(\mathrm{c \rightarrow h_c})$ in pp collisions at $\sqrt{s}$ = 13 TeV

  • Figure 13 Left pp 5.02 TeV

    Data from Figure 13 (left panel)

    10.17182/hepdata.145759.v1/t38

    $f(\mathrm{c \rightarrow h_c})$ in pp collisions at $\sqrt{s}$ = 5.02 TeV

  • Figure 13 Right

    Data from Figure 13 (right panel)

    10.17182/hepdata.145759.v1/t39

    $\sigma(\mathrm{c\bar{c}})$ at $|y|<0.5$ in pp collisions vs.$\sqrt{s}$

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