Abstract (data abstract)

Two-particle Bose-Einstein momentum correlation functions for charged-hadron pairs in lead-lead collisions at a center-of-mass energy per nucleon pair of $\sqrt{s_{_{\mathrm{NN}}}} = 5.02$ TeV are studied. The data sample, containing $4.27\times 10^{9}$ events corresponding to an integrated luminosity of 0.607 $\mathrm{nb}^{-1}$, was collected by the CMS experiment in 2018. The experimental results are discussed in terms of a Levy-type source distribution. The parameters of this distribution are extracted as functions of particle pair average transverse mass and collision centrality. These parameters include the correlation strength parameter, the Levy index or shape parameter ($\alpha$), and the Levy scale parameter ($R$). The source shape, characterized by $\alpha$, is found to be neither Cauchy nor Gaussian, implying the need for a full Levy analysis. Similarly to what was previously found for systems characterized by Gaussian source radii, a hydrodynamical scaling is also observed for the Levy $R$ parameter.

Table 1

Data from figure 1.

10.17182/hepdata.134676.v1/t1

The correlation function $C_2(q)$ of negatively charged hadron pairs with $1.00<K_{\mathrm{T}}<1.05$ GeV/$c$ in the 10-20% centrality bin.
Table 2

Data from figure 2.

10.17182/hepdata.134676.v1/t2

The double-ratio correlation function $DR(q)$ of negatively charged hadron pairs with $1.30<K_{\mathrm{T}}<1.35$ GeV/$c$ in the 20-30% centrality bin.
Table 3

Data from figure 3.

10.17182/hepdata.134676.v1/t3

The two-particle correlation function of negatively charged hadron pairs with $0.9<K_{\mathrm{T}}<1.3$ GeV/$c$ in the 0-100% centrality range, calculated using MC...
Table 4

Data from figure 4.

10.17182/hepdata.134676.v1/t4

The Levy scale parameter $R$ versus the transverse mass $m_{\mathrm{T}}$ in different centrality classes for negatively and positively charged hadron...
Table 5

Data from figure 5.

10.17182/hepdata.134676.v1/t5

The $1/R^2$ distribution vs. transverse mass $m_{\mathrm{T}}$ in different centrality classes for negatively and positively charged hadron pairs.
Table 6

Data from figure 6 left.

10.17182/hepdata.134676.v1/t6

The linear-fit parameter $A$ versus $\langle N_{\text{part}}\rangle$ for positively and negatively charged hadron pairs. The bin range on $\langle N_{\text{part}}\rangle$...
Table 7

Data from figure 6 right.

10.17182/hepdata.134676.v1/t7

The linear-fit parameter $B$ versus $\langle N_{\text{part}}\rangle$ for positively and negatively charged hadron pairs. The bin range on $\langle N_{\text{part}}\rangle$...
Table 8

Data from figure 7.

10.17182/hepdata.134676.v1/t8

The Levy scale parameter $R$ versus $\langle N_{\text{part}}\rangle^{1/3}$ in different $m_{\mathrm{T}}$ classes for negatively and positively charged hadron pairs. The...
Table 9

Data from figure 8.

10.17182/hepdata.134676.v1/t9

The Levy stability index $\alpha$ versus the transverse mass $m_{\mathrm{T}}$ in different centrality classes for negatively and positively charged hadron...
Table 10

Data from figure 9.

10.17182/hepdata.134676.v1/t10

The average Levy stability index $\langle \alpha \rangle$ versus $\langle N_{\text{part}}\rangle$ for both positively and negatively charged hadron pairs. The...
Table 11

Data from figure 10 upper panel.

10.17182/hepdata.134676.v1/t11

The correlation strength $\lambda$ versus the transverse mass $m_{\mathrm{T}}$ in different centrality classes for negatively and positively charged hadron pairs.
Table 12

Data from figure 10 lower panel.

10.17182/hepdata.134676.v1/t12

The correlation strength (re-scaled with the square of the pion fraction) $\lambda ^*$ versus the transverse mass $m_{\mathrm{T}}$ in different...

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

JSON

YAML

YODA

YODA1

ROOT

CSV

Visualize

Ask a Question