Jet-quenching Signatures from Very High-pT Dihadron Correlations in Pb+Pb Collisions at Square Root of S NN

Jet-quenching Signatures from Very High-pT Dihadron Correlations in Pb+Pb Collisions at Square Root of S NN
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ISBN-10 : 1339064324
ISBN-13 : 9781339064321
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Book Synopsis Jet-quenching Signatures from Very High-pT Dihadron Correlations in Pb+Pb Collisions at Square Root of S NN by : Rylan Towne Conway

Download or read book Jet-quenching Signatures from Very High-pT Dihadron Correlations in Pb+Pb Collisions at Square Root of S NN written by Rylan Towne Conway and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements from dihadron correlations triggered with very high-p[subscript]T particles in Pb+Pb collisions at 2.76 TeV are shown. The data set was collected by the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) and corresponds to an integrated luminosity of 150 [mu]b−1. The use of high-p[subscript]T track triggers made it possible to study dihadron correlations up to p[subscript]T ~ 50 GeV/c. The presence of azimuthal anisotropies of final state particles in non-central Pb+Pb collisions gives rise to single-particle correlations that are characterized by the Fourier harmonics, v[subscript]n. To isolate the jet components of the correlations, the v2-v4 components are subtracted from the correlations and the per-trigger-particle associated-yields on the near and away side are studied. The data are compared to correlations from p+p collisions at the same center-of-mass energy over a wide range of trigger and associated-particle p[subscript]T and as a function of Pb+Pb event centrality. On the near-side there is evidence of moderate enhancement at low p[superscript]assc [subscript]T. On the away side there is a significant enhancement at p[superscript]assc [subscript]T ~ 0.5 GeV/c and at higher transverse momentum, p[superscript]assc [subscript]T > 3 GeV/c, there is a suppression of about 50% compared to p+p collisions.


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