Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at $\sqrt{s}$ = 13 TeV and in p$-$Pb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV

The ALICE collaboration
JHEP 03 (2024) 092, 2024.

Abstract
Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at $\sqrt{s}=13$ TeV and p$-$Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV. The correlation functions are measured as a function of relative azimuthal angle $\Delta\varphi$ and pseudorapidity separation $\Delta\eta$ for pairs of primary charged particles within the pseudorapidity interval $|\eta| < 0.9$ and the transverse-momentum interval $1 < p_{\rm T} < 4$ GeV/$c$. Flow coefficients are extracted for the long-range correlations ($1.6 < |\Delta\eta| <1.8$) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.

  • PER TRIGGER YIELD

    Data from Figures 2

    10.17182/hepdata.151802.v1/t1

    High and low multiplicity long-range delta phi correlations

  • JET FRAG YIELD

    Data from Figures 3

    10.17182/hepdata.151802.v1/t2

    Jet fragmentation yields of near and away side as a function of multiplicity class and and the ratio of them,...

  • VNPT

    Data from Figures 4

    10.17182/hepdata.151802.v1/t3

    The second and third harmonic coefficients as a function of transverse momentum in pp and p--Pb collisions.

  • V2MULT

    Data from Figures 5

    10.17182/hepdata.151802.v1/t4

    The second harmonic coefficients as a functino of charged-particle multiplicity in pp collisions.

  • V3MULT

    Data from Figures 5

    10.17182/hepdata.151802.v1/t5

    The third harmonic coefficients as a functino of charged-particle multiplicity in pp collisions.

  • VNMULT

    Data from Figures 5

    10.17182/hepdata.151802.v1/t6

    The second and third harmonic coefficients as a functino of charged-particle multiplicity in p-Pb collisions.

  • V2LP

    Data from Figures 6

    10.17182/hepdata.151802.v1/t7

    The second harmonic coefficients as a functino of minimum leading particle transverse momentum.

  • V3LP

    Data from Figures 6

    10.17182/hepdata.151802.v1/t8

    The third harmonic coefficients as a functino of minimum leading particle transverse momentum.

  • V2JET

    Data from Figures 6

    10.17182/hepdata.151802.v1/t9

    The second harmonic coefficients as a functino of minimum jet transverse momentum.

  • V3JET

    Data from Figures 6

    10.17182/hepdata.151802.v1/t10

    The third harmonic coefficients as a functino of minimum jet transverse momentum.

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