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Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The ALICE collaboration
Eur.Phys.J. C80 (2020) 167, 2020.

Abstract (data abstract)
The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity ($\left|y\right| < 0.5$) are measured in proton-proton collisions at $\sqrt{s}$ = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of $K^{0}_{s}$, $\Lambda$, $\Xi$, and $\Omega$ increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.

  • Table 1

    Data from figure 2

    10.17182/hepdata.93535.v1/t1

    $K^{0}_{S}$ transverse momentum spectrum - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 2

    Data from figure 2

    10.17182/hepdata.93535.v1/t2

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 3

    Data from figure 2

    10.17182/hepdata.93535.v1/t3

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 4

    Data from figure 2

    10.17182/hepdata.93535.v1/t4

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 1R

    Data from figure 2

    10.17182/hepdata.93535.v1/t5

    $K^{0}_{S}$ transverse momentum spectrum ratios to INEL>0 - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 2R

    Data from figure 2

    10.17182/hepdata.93535.v1/t6

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum ratios to INEL>0 - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 3R

    Data from figure 2

    10.17182/hepdata.93535.v1/t7

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum ratios to INEL>0 - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 4R

    Data from figure 2

    10.17182/hepdata.93535.v1/t8

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum ratios to INEL>0 - V0M multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 1a

    Data from figure 3

    10.17182/hepdata.93535.v1/t9

    $K^{0}_{S}$ transverse momentum spectrum - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 2a

    Data from figure 3

    10.17182/hepdata.93535.v1/t10

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 3a

    Data from figure 3

    10.17182/hepdata.93535.v1/t11

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 4a

    Data from figure 3

    10.17182/hepdata.93535.v1/t12

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 1aR

    Data from figure 3

    10.17182/hepdata.93535.v1/t13

    $K^{0}_{S}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 2aR

    Data from figure 3

    10.17182/hepdata.93535.v1/t14

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 3aR

    Data from figure 3

    10.17182/hepdata.93535.v1/t15

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 4aR

    Data from figure 3

    10.17182/hepdata.93535.v1/t16

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets08 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 1b

    Data from figure 4

    10.17182/hepdata.93535.v1/t17

    $K^{0}_{S}$ transverse momentum spectrum - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 2b

    Data from figure 4

    10.17182/hepdata.93535.v1/t18

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 3b

    Data from figure 4

    10.17182/hepdata.93535.v1/t19

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 4b

    Data from figure 4

    10.17182/hepdata.93535.v1/t20

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties across multiplicity. Uncorrelated...

  • Table 1bR

    Data from figure 3

    10.17182/hepdata.93535.v1/t21

    $K^{0}_{S}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 2bR

    Data from figure 3

    10.17182/hepdata.93535.v1/t22

    $\Lambda+\bar{\Lambda}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 3bR

    Data from figure 3

    10.17182/hepdata.93535.v1/t23

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 4bR

    Data from figure 3

    10.17182/hepdata.93535.v1/t24

    $\Omega^{-}+\bar{\Omega^{+}}$ transverse momentum spectrum ratios to INEL>0 - SPDtracklets0815 multiplicity classes. Total systematic uncertainties include both correlated and uncorrelated uncertainties...

  • Table 5a

    Data from figure 5

    10.17182/hepdata.93535.v1/t25

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ average transverse momentum vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 5b

    Data from figure 5

    10.17182/hepdata.93535.v1/t26

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ average transverse momentum vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 5c

    Data from figure 5

    10.17182/hepdata.93535.v1/t27

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ average transverse momentum vs multiplicity - V0M multiplicity classes

  • Table 5aO

    Data from figure 5

    10.17182/hepdata.93535.v1/t28

    $\Omega^{-}+\bar{\Omega^{+}}$ average transverse momentum vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 5bO

    Data from figure 5

    10.17182/hepdata.93535.v1/t29

    $\Omega^{-}+\bar{\Omega^{+}}$ average transverse momentum vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 5cO

    Data from figure 5

    10.17182/hepdata.93535.v1/t30

    $\Omega^{-}+\bar{\Omega^{+}}$ average transverse momentum vs multiplicity - V0M multiplicity classes

  • Table 6a

    Data from figure 6

    10.17182/hepdata.93535.v1/t31

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ self-normalized yields vs self-normalized multiplicity - V0M multiplicity classes

  • Table 6aO

    Data from figure 6

    10.17182/hepdata.93535.v1/t32

    $\Omega^{-}+\bar{\Omega^{+}}$ self-normalized yields vs self-normalized multiplicity - V0M multiplicity classes

  • Table 6b

    Data from figure 6

    10.17182/hepdata.93535.v1/t33

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ self-normalized yields vs self-normalized multiplicity - SPDTracklets08 multiplicity classes

  • Table 6bO

    Data from figure 6

    10.17182/hepdata.93535.v1/t34

    $\Omega^{-}+\bar{\Omega^{+}}$ self-normalized yields vs self-normalized multiplicity - SPDTracklets08 multiplicity classes

  • Table 6c

    Data from figure 6

    10.17182/hepdata.93535.v1/t35

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ self-normalized yields vs self-normalized multiplicity - SPDTracklets0815 multiplicity classes

  • Table 6cO

    Data from figure 6

    10.17182/hepdata.93535.v1/t36

    $\Omega^{-}+\bar{\Omega^{+}}$ self-normalized yields vs self-normalized multiplicity - SPDTracklets0815 multiplicity classes

  • Table 7a

    Data from figure 7

    10.17182/hepdata.93535.v1/t37

    $K^{0}_{S}$ transverse momentum spectra ratios SPDTracklets-to-V0M

  • Table 7b

    Data from figure 7

    10.17182/hepdata.93535.v1/t38

    $\Lambda+\bar{\Lambda}$ transverse momentum spectra ratios SPDTracklets-to-V0M

  • Table 7c

    Data from figure 7

    10.17182/hepdata.93535.v1/t39

    $\Xi^{-}+\bar{\Xi^{+}}$ transverse momentum spectra ratios SPDTracklets-to-V0M

  • Table 8a

    Data from figure 8 and 10

    10.17182/hepdata.93535.v1/t40

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 8b

    Data from figure 8 and 10

    10.17182/hepdata.93535.v1/t41

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 8c

    Data from figure 8, 10, 11, 12 and 14

    10.17182/hepdata.93535.v1/t42

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields vs multiplicity - V0M multiplicity classes

  • Table 8aO

    Data from figure 8 and 10

    10.17182/hepdata.93535.v1/t43

    $\Omega^{-}+\bar{\Omega^{+}}$, $K^{0}_{S}$ integrated yields vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 8bO

    Data from figure 8 and 10

    10.17182/hepdata.93535.v1/t44

    $\Omega^{-}+\bar{\Omega^{+}}$, $K^{0}_{S}$ integrated yields vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 8cO

    Data from figure 8, 10, 11, 12 and 14

    10.17182/hepdata.93535.v1/t45

    $\Omega^{-}+\bar{\Omega^{+}}$, $K^{0}_{S}$ integrated yields vs multiplicity - V0M multiplicity classes

  • Table 9a

    Data from figure 9

    10.17182/hepdata.93535.v1/t46

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields (no extr.) vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 9b

    Data from figure 9

    10.17182/hepdata.93535.v1/t47

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields (no extr.) vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 9c

    Data from figure 9

    10.17182/hepdata.93535.v1/t48

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$ integrated yields (no extr.) vs multiplicity - V0M multiplicity classes

  • Table 9aO

    Data from figure 9

    10.17182/hepdata.93535.v1/t49

    $\Omega^{-}+\bar{\Omega^{+}}$ integrated yields (no extr.) vs multiplicity - SPDtracklets08 multiplicity classes

  • Table 9bO

    Data from figure 9

    10.17182/hepdata.93535.v1/t50

    $\Omega^{-}+\bar{\Omega^{+}}$ integrated yields (no extr.) vs multiplicity - SPDtracklets0815 multiplicity classes

  • Table 9cO

    Data from figure 9

    10.17182/hepdata.93535.v1/t51

    $\Omega^{-}+\bar{\Omega^{+}}$ integrated yields (no extr.) vs multiplicity - V0M multiplicity classes

  • Table 11a

    Data from figure 11

    10.17182/hepdata.93535.v1/t52

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$, $\Omega^{-}+\bar{\Omega^{+}}$ integrated yields - INEL>0. V0M multiplicity dependent yields are already listed in Table 8c.

  • Table 11b

    Data from figure 11

    10.17182/hepdata.93535.v1/t53

    $K^{0}_{S}$, $\Lambda+\bar{\Lambda}$, $\Xi^{-}+\bar{\Xi^{+}}$, $\Omega^{-}+\bar{\Omega^{+}}$ integrated yields - INEL>0. V0M multiplicity dependent yields at 7 TeV are listed in the corresponding...

  • Table 13a

    Data from figure 13

    10.17182/hepdata.93535.v1/t54

    $\Lambda+\bar{\Lambda}/K^{0}_{S}$, $\Xi^{-}+\bar{\Xi^{+}}/K^{0}_{S}$ - Tracklets08 multiplicity classes

  • Table 13b

    Data from figure 13

    10.17182/hepdata.93535.v1/t55

    $\Lambda+\bar{\Lambda}/K^{0}_{S}$, $\Xi^{-}+\bar{\Xi^{+}}/K^{0}_{S}$ - Tracklets0815 multiplicity classes

  • Table 13c

    Data from figure 13

    10.17182/hepdata.93535.v1/t56

    $\Lambda+\bar{\Lambda}/K^{0}_{S}$, $\Xi^{-}+\bar{\Xi^{+}}/K^{0}_{S}$ - V0M multiplicity classes

  • Table 13aO

    Data from figure 13

    10.17182/hepdata.93535.v1/t57

    $\Omega^{-}+\bar{\Omega^{+}}/K^{0}_{S}$ - Tracklets08 multiplicity classes

  • Table 13bO

    Data from figure 13

    10.17182/hepdata.93535.v1/t58

    $\Omega^{-}+\bar{\Omega^{+}}/K^{0}_{S}$ - Tracklets0815 multiplicity classes

  • Table 13cO

    Data from figure 13

    10.17182/hepdata.93535.v1/t59

    $\Omega^{-}+\bar{\Omega^{+}}/K^{0}_{S}$ - V0M multiplicity classes

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