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Multiplicity dependence of $\pi $, K, and p production in pp collisions at $\sqrt{s} = 13$ TeV

The ALICE collaboration
Eur.Phys.J.C 80 (2020) 693, 2020.

Abstract (data abstract)
This paper presents the measurements of $\pi^{\pm}$, $K^{\pm}$, $p$ and $\bar{p}$ transverse momentum ($p_{\rm T}$) spectra as a function of charged-particle multiplicity density in proton-proton (pp) collisions at $\sqrt{s} = 13\ {\rm TeV}$ with the ALICE detector at the LHC. Such study allows us to isolate the center-of-mass energy dependence of light-flavour particle production. The measurements reported here cover a $p_{\rm T}$ range from 0.1 ${\rm GeV}/c$ to 20 ${\rm GeV}/c$ and are done in the rapidity interval $|y|<0.5$. The $p_{\rm T}$-differential particle ratios exhibit an evolution with multiplicity, similar to that observed in pp collisions at $\sqrt{s} = 7\ {\rm TeV}$, which is qualitatively described by some of the hydrodynamical and pQCD-inspired models discussed in this paper. Furthermore, the $p_{\rm T}$-integrated hadron-to-pion yield ratios measured in pp collisions at two different center-of-mass energies are consistent when compared at similar multiplicities. This also extends to strange and multi-strange hadrons, suggesting that, at LHC energies, particle hadrochemistry scales with particle multiplicity the same way under different collision energies and colliding systems.

  • Table 1

    Table from Figure 1

    10.17182/hepdata.96821.v1/t1

    $\pi^{+} + \pi^{-}$ transverse momentum spectra in V0M multilpicity classes

  • Table 2

    Table from Figure 1

    10.17182/hepdata.96821.v1/t2

    $\pi^{+} + \pi^{-}$ transverse momentum spectra in V0M multilpicity classes

  • Table 3

    Table from Figure 1

    10.17182/hepdata.96821.v1/t3

    $K^{+} + K^{-}$ transverse momentum spectra in V0M multilpicity classes

  • Table 4

    Table from Figure 1

    10.17182/hepdata.96821.v1/t4

    $K^{+} + K^{-}$ transverse momentum spectra in V0M multilpicity classes

  • Table 5

    Table from Figure 1

    10.17182/hepdata.96821.v1/t5

    $p + \bar{p}$ transverse momentum spectra in V0M multilpicity classes

  • Table 6

    Table from Figure 1

    10.17182/hepdata.96821.v1/t6

    $p + \bar{p}$ transverse momentum spectra in V0M multilpicity classes

  • Table 7

    Table from Figure 1

    10.17182/hepdata.96821.v1/t7

    $\pi^{+} + \pi^{-}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 8

    Table from Figure 1

    10.17182/hepdata.96821.v1/t8

    $\pi^{+} + \pi^{-}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 9

    Table from Figure 1

    10.17182/hepdata.96821.v1/t9

    $K^{+} + K^{-}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 10

    Table from Figure 1

    10.17182/hepdata.96821.v1/t10

    $K^{+} + K^{-}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 11

    Table from Figure 1

    10.17182/hepdata.96821.v1/t11

    $p + \bar{p}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 12

    Table from Figure 1

    10.17182/hepdata.96821.v1/t12

    $p + \bar{p}$ transverse momentum spectra ratios, V0M multiplicity classes to INEL>0

  • Table 13

    Table from Figure 2

    10.17182/hepdata.96821.v1/t13

    Transverse momentum dependence of ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) and ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) ratios in low-$p_T$ interval in...

  • Table 14

    Table from Figure 2

    10.17182/hepdata.96821.v1/t14

    Transverse momentum dependence of ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) and ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) ratios in mid-$p_T$ interval in...

  • Table 15

    Table from Figure 2

    10.17182/hepdata.96821.v1/t15

    Transverse momentum dependence of ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) and ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) ratios in high-$p_T$ interval in...

  • Table 16

    Table from Figure 4

    10.17182/hepdata.96821.v1/t16

    Blast-wave fit parameters

  • Table 17

    Table from Figure 5

    10.17182/hepdata.96821.v1/t17

    $p_{T}$-integrated ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) and ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) ratios in pp collisions as a function of...

  • Table 18

    Table from Figure 6

    10.17182/hepdata.96821.v1/t18

    $p_{T}$-integrated (multi)strange hadron to pion ratios in pp collisions as a function of $\langle dN_{ch}/d\eta\rangle_{|\eta|<0.5}$

  • Table 19

    Table from Figure 6

    10.17182/hepdata.96821.v1/t19

    $p_{T}$-integrated ($\Omega^{-} + \bar{\Omega}^{+}$)/($\pi^{+} + \pi^{-}$) ratios in pp collisions as a function of $\langle dN_{ch}/d\eta\rangle_{|\eta|<0.5}$

  • Table 20

    Table from Figure 7

    10.17182/hepdata.96821.v1/t20

    Average transverse momentum of $\pi^{+} + \pi^{-}$, $K^{+} + K^{-}$, and $p + \bar{p}$ as a function of $\langle dN_{ch}/d\eta\rangle_{|\eta|<0.5}$

  • Table 21

    Table from an unpublished complementary figure

    10.17182/hepdata.96821.v1/t21

    Transverse momentum spectra ratios ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) in V0M multiplicity classes

  • Table 22

    Table from an unpublished complementary figure

    10.17182/hepdata.96821.v1/t22

    Transverse momentum spectra ratios ($K^{+} + K^{-}$)/($\pi^{+} + \pi^{-}$) in V0M multiplicity classes

  • Table 23

    Table from an unpublished complementary figure

    10.17182/hepdata.96821.v1/t23

    Transverse momentum spectra ratios ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) in V0M multiplicity classes

  • Table 24

    Table from an unpublished complementary figure

    10.17182/hepdata.96821.v1/t24

    Transverse momentum spectra ratios ($p + \bar{p}$)/($\pi^{+} + \pi^{-}$) in V0M multiplicity classes

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