Abstract (data abstract)

In this Letter, measurements of the long-range correlations in p--Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$~TeV are extended to a pseudorapidity gap of $\Delta\eta\sim$8 between particles using the ALICE forward multiplicity detectors. After suppressing non-flow correlations, e.g., from jet and resonance decays, the ridge structure is observed to persist up to a very large gap of $\Delta\eta\sim$8 for the first time in p--Pb collisions. This shows that the collective flow-like correlations extend over an extensive pseudorapidity range also in small collision systems such as p--Pb collisions. The pseudorapidity dependence of the second-order anisotropic flow coefficient, \Veta, is extracted from the long-range correlations. The $v(\eta)$ results are presented for a wide pseudorapidity range of $-3.1 <\eta< 4.8$ in various centrality classes in p--Pb collisions. To gain a comprehensive understanding of the source of anisotropic flow in small collision systems, the $v(\eta)$ measurements are compared with hydrodynamic and transport model calculations. The comparison suggests that the final-state interactions play a dominant role in developing the anisotropic flow in small collision systems.

Table 3

Data from Figure 3

10.17182/hepdata.151801.v1/t1

$v_{2}\{2\}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of pseudorapidity in different centrality classes using the template fit...
Table_4_0

Data from Figure 4 of red circle

10.17182/hepdata.151801.v1/t2

$v_{2}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of charged particle density for five different pseudorapidity regions with...
Table_4_1

Data from Figure 4 of orange square

10.17182/hepdata.151801.v1/t3

$v_{2}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of charged particle density for five different pseudorapidity regions with...
Table_4_2

Data from Figure 4 of blue diamond

10.17182/hepdata.151801.v1/t4

$v_{2}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of charged particle density for five different pseudorapidity regions with...
Table_4_3

Data from Figure 4 of green cross

10.17182/hepdata.151801.v1/t5

$v_{2}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of charged particle density for five different pseudorapidity regions with...
Table_4_4

Data from Figure 4 of open circle

10.17182/hepdata.151801.v1/t6

$v_{2}$ at $p_{\rm T} > 0$ GeV/$c$ as a function of charged particle density for five different pseudorapidity regions with...

Table 3

Table_4_0

Table_4_1

Table_4_2

Table_4_3

Table_4_4

JSON

YAML

YODA

YODA1

ROOT

CSV

Visualize

Ask a Question