Measurement of long-range two- and multi-particle correlations by ALICE

Nov 6, 2019, 3:00 PM
Ball Room 3 (Wanda Reign Wuhan Hotel)

Ball Room 3

Wanda Reign Wuhan Hotel

Oral Presentation Small systems Parallel Session - Small systems IV


Yuko Sekiguchi for the ALICE Collaboration (University of Tokyo (JP))


Measurements of long-range two- and multi-particle correlations have long provided critical insights into the properties of the strong coupled matter created in heavy-ion collisions. They have also provided hints that a shorty lived QGP may exist in smaller systems. We will present new results on long-range two-particle correlations for different charged particles multiplicities in pp at $\sqrt{s} = 13~\rm{TeV}$ and in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02~\rm{TeV}$. These measurements utilize the the Forward Multiplicity Detector (FMD), which allows for unprecedented $\Delta\eta$ ranges to be explored (up to $\Delta\eta ~\sim 8$). We will compare such measurements to predictions from Monte Carlo generators, which helps us to understand the contribution from non QGP like processes in an unexplored kinematic regime. We will also present the first measurements of the $\eta$ dependence of two- and multi-particle cumulants in Pb-Pb 5.02 TeV collisions. These provide key constraints to the temperature dependence of $\eta/s$, and by comparing to AMPT, will provide the most precise information yet on the 3D evolution of the hot and dense matter created in heavy-ion collisions.

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