Jet and charged hadron nuclear modification factors in pPb and PbPb collisions with CMS

May 20, 2014, 9:20 AM
titanium (darmstadtium)



Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk Jets Jets


Eric Andrew Appelt (Vanderbilt University (US))


One of the signatures of the strongly interacting medium produced in central PbPb collisions is the suppression of high-$p_{\rm T}$ jets and charged particles. In order to to disentangle the initial state and final state effects in heavy ion collisions, the nuclear modification factor of both jets and of charged-particles in pPb ($R_{\rm pPb}$) and PbPb ($R_{\rm PbPb}$) collisions are presented. The spectra of both jets and charged-particles in pp collisions at $\sqrt{s} = 2.76$, PbPb collisions at $\sqrt{s_{NN}} = 2.76$ TeV, and pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV, have been measured with the CMS detector using high statistics samples. The $R_{\rm pPb}$ of charged particles is determined by dividing the measured pPb spectrum by a pp reference spectrum constructed using interpolation methods, or alternatively from PYTHIA simulations.
On behalf of collaboration: CMS

Primary author

Eric Andrew Appelt (Vanderbilt University (US))

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