Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV

The CMS collaboration
No Journal Information, 2019

Abstract
Measurements of the pseudorapidity distributions of charged hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV are presented. The measurements are based on data collected by the CMS experiment at the LHC. The yield of primary charged hadrons produced in xenon-xenon collisions in the pseudorapidity range $|\eta| < $ 3.2 is determined using the silicon pixel detector in the CMS tracking system. For the 5% most central collisions, the charged-hadron pseudorapidity density in the midrapidity region $|\eta| <$ 0.5 is found to be 1187 $\pm$ 36 (syst), with a negligible statistical uncertainty. The rapidity distribution of charged hadrons is also presented in the range $|y| <$ 3.2 and is found to be independent of rapidity around $y =$ 0. Comparisons of charged-hadron multiplicities between xenon-xenon and lead-lead collisions at similar collision energies show that particle production at midrapidity is strongly dependent on the collision geometry in addition to the system size and collision energy.

  • Table 1

    Data from Figure 2

    10.17182/hepdata.88285.v1/t1

    Averaged and symmetrised charged-hadron pseudorapidity density distributions in XeXe collisions at $\sqrt{s_{NN}} = 5.44$ TeV, for events in the 0--80\%,...

  • Table 2

    Data from Figure 3

    10.17182/hepdata.88285.v1/t2

    Averaged and symmetrised charged-hadron rapidity density distributions in XeXe collisions at $\sqrt{s_{NN}} = 5.44$ TeV, for events in the 0--80\%...

  • Table 3

    Data from Figure 4 (left)

    10.17182/hepdata.88285.v1/t3

    Charged-hadron pseudorapidity density in XeXe collisions at $\sqrt{s_{NN}} = 5.44$ TeV at midrapidity as a function of event centrality. The...

  • Table 4

    Data from Figure 4 (right)

    10.17182/hepdata.88285.v1/t4

    Charged-hadron pseudorapidity density in XeXe collisions at $\sqrt{s_{NN}} = 5.44$ TeV at midrapidity, normalised by $2A$, where $A$ is the...

  • Table 5

    Data from Figure 5 (left)

    10.17182/hepdata.88285.v1/t5

    Average charged-hadron pseudorapidity density at midrapidity normalised by $\langle N_{part} \rangle$, shown as a function of $\langle N_{part} \rangle$. The...

  • Table 6

    Data from Figure 5 (right)

    10.17182/hepdata.88285.v1/t6

    Average charged-hadron pseudorapidity density at midrapidity normalised by $\langle N_{part} \rangle$, shown as a function of $\langle N_{part} \rangle/2A$, where...

  • Table 7

    Data from Figure 6

    10.17182/hepdata.88285.v1/t7

    Average charged-hadron pseudorapidity density at midrapidity normalised by $2A$, shown as a function of $\langle N_{part} \rangle/2A$, where $A$ is...

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