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Ridges and Soft Jet Components in Untriggered Di-hadron Correlations in Pb+Pb Collisions at 2.76 TeV

Abstract : We study untriggered di-hadron correlations in Pb+Pb at 2.76 TeV, based on an event-by-event simulation of a hydrodynamic expansion starting from flux tube initial conditions. The correlation function shows interesting structures as a function of the pseudorapidity difference $\Delta\eta$ and the azimuthal angle difference $\Delta\phi$, in particular comparing different centralities. We can clearly identify a peak-like nearside structure associated with very low momentum components of jets for peripheral collisions, which disappears towards central collisions. On the other hand, a very broad ridge structure from asymmetric flow seen at central collisions, gets smaller and finally disappears towards peripheral collisions.
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http://hal.in2p3.fr/in2p3-00587103
Contributor : Dominique Girod <>
Submitted on : Tuesday, April 19, 2011 - 2:22:12 PM
Last modification on : Friday, January 3, 2020 - 4:30:07 PM

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  • HAL Id : in2p3-00587103, version 1
  • ARXIV : 1104.3269

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Klaus Werner, Iu. Karpenko, K. Mikhailov, T. Pierog. Ridges and Soft Jet Components in Untriggered Di-hadron Correlations in Pb+Pb Collisions at 2.76 TeV. 2011. ⟨in2p3-00587103⟩

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