| Summary: | In two-particle angular correlation measurements, the distribution of charged hadron pairs are evaluated as a function of pseudorapidity (<inline-formula> <math display="inline"> <semantics> <mrow> <mi mathvariant="sans-serif">Δ</mi> <mi>η</mi> </mrow> </semantics> </math> </inline-formula>) and azimuthal (<inline-formula> <math display="inline"> <semantics> <mrow> <mi mathvariant="sans-serif">Δ</mi> <mi>φ</mi> </mrow> </semantics> </math> </inline-formula>) differences. In these correlations, jets manifest themselves as a near-side peak around <inline-formula> <math display="inline"> <semantics> <mrow> <mi mathvariant="sans-serif">Δ</mi> <mi>η</mi> <mo>=</mo> <mn>0</mn> <mo>,</mo> </mrow> </semantics> </math> </inline-formula> <inline-formula> <math display="inline"> <semantics> <mrow> <mi mathvariant="sans-serif">Δ</mi> <mi>φ</mi> <mo>=</mo> <mn>0</mn> </mrow> </semantics> </math> </inline-formula>. These correlations can be used to extract transverse momentum (<inline-formula> <math display="inline"> <semantics> <msub> <mi>p</mi> <mi>T</mi> </msub> </semantics> </math> </inline-formula>) and centrality dependence of the shape of the near-side peak in Pb-Pb collision. The shape of the near-side peak is quantified by the variances of the distribution. The variances are evaluated from a fit combining the peak and the background. In this contribution, identified and unidentified angular correlations are shown from Pb-Pb collisions at <inline-formula> <math display="inline"> <semantics> <mrow> <msqrt> <msub> <mi>s</mi> <mrow> <mi>N</mi> <mi>N</mi> </mrow> </msub> </msqrt> <mo>=</mo> <mn>2.76</mn> </mrow> </semantics> </math> </inline-formula> TeV from Monte Carlo simulations (AMPT, PYTHIA 8.235/Angantyr). Results show that transport models in AMPT give better results than PYTHIA 8.235/Angantyr when comparing to the experimental results of the ALICE collaboration.
|
|---|