12-18 August 2012
US/Eastern timezone

If you have any questions about the details of the program please contact Bolek Wyslouch

Short- and long-range very-high-pT triggered dihadron correlations in PbPb collisions at 2.76 TeV with CMS

14 Aug 2012, 15:15
20m
Diplomat ()

Diplomat

Oral Presentation Correlations and fluctuations Parallel 1C: Correlations & Fluctuations (Chair J. Schukraft)

Speaker

Rylan Towne Conway (University of California Davis (US))

Description

New precision measurements of dihadron correlations triggered by a very high-pT particle in 2.76 TeV PbPb collisions over a broad range of pseudorapidity and the full range of azimuthal angle will be presented. Utilizing a novel and unique high-pT single-track high-level trigger, the analysis explores the full 2011 PbPb data set corresponding to an integrated luminosity of 150/ub collected by CMS. For the first time, a long-range correlation structure up to |delta-eta|~4 at small delta-phi (near side) is observed for such very high-pT (e.g., pT~20 GeV/c) trigger particles correlated with low-pT (a few GeV/c) associated particles. The observed long-range correlations in |delta-eta| on the near side are consistent with the single-particle azimuthal anisotropy (characterized by the Fourier harmonics, vn) of high-pT trigger particles measured relative to the event-plane angle determined with the forward hadronic calorimeters. After subtracting the vn harmonics component, the shape and yield on the near (|delta-phi| < 1) and away (|delta-phi| > 1) side of the residual dihadron correlations have been studied systematically over a wide kinematic range in trigger (12 < pT[trig] < 50 GeV/c) and associated ( 0.5 GeV/c < pT[assoc] < pT[trig]) particle pT, as a function of pseudorapidity and collision centrality. The results are compared to those in pp collisions at the same energy.

Primary author

Presentation Materials

Paper

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×