CMS-PAS-HIN-14-014

CMS-PAS-HIN-14-014
Centrality and pseudorapidity dependence of transverse energy flow in pPb collisions at $\sqrt{s_{\rm NN}} =$ 5.02 TeV
CMS Collaboration
September 2015

Abstract: The almost hermetic coverage of CMS is used to measure the distribution of transverse energy as a function of pseudo-rapidity for pPb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV. For minimum bias collisions $(1/N) \mathrm{d}E_T/\mathrm{d}\eta$ reaches 23 GeV which implies an $E_{\mathrm{T}}$ per participant pair comparable to that of peripheral PbPb collisions at $\sqrt{s_{NN}} =$ 2.76 TeV. The centrality dependence of transverse energy dependence has been studied using centrality measures defined in three different angular regions. There is a strong auto-correlation between $(1/N)~\mathrm{d}E_T/\mathrm{d}\eta$ and the $\eta$ range used to define centrality both for data and the EPOS-LHC and HIJING event generators. The centrality dependence of the data is much stronger for $\eta$ values on the lead side than the proton side and shows significant differences from that predicted by either of the event generators.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, PRC 100 (2019) 024902. The superseded preliminary plots can be found here.

CMS Publications