This is not the latest version of this item. The latest version can be found here.
Centrality and pseudorapidity dependence of the transverse energy density in p Pb collisions at √ s N N = 5.02 TeV
Name
PhysRevC.100.024902.pdf
Description
Published version
Size
1.23 MB
Format
Adobe PDF
Checksum (MD5)
449b7d596398e2280614ed5ab0b44357
Date Issued
2019
Journal
Physical Review C
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 CERN, for the CMS Collaboration. The almost hermetic coverage of the CMS detector is used to measure the distribution of transverse energy, ET, over 13.2 units of pseudorapidity, η, for pPb collisions at a center-of-mass energy per nucleon pair of √sNN=5.02 TeV. The huge angular acceptance exploits the fact that the CASTOR calorimeter at -6.6 < η < -5.2 is effectively present on both sides of the colliding system because of a switch in the proton-going and lead-going beam directions. This wide acceptance enables the study of correlations between well-separated angular regions and makes the measurement a particularly powerful test of event generators. For minimum bias pPb collisions the maximum value of dET/dη is 22 GeV, which implies an ET per participant nucleon pair comparable to that of peripheral PbPb collisions at √sNN= 2.76 TeV. The increase of dET/dη with centrality is much stronger for the lead-going side than for the proton-going side. The η dependence of dET/dη is sensitive to the η range in which the centrality variable is defined. Several modern generators are compared to these results but none is able to capture all aspects of the η and centrality dependence of the data and the correlations observed between different η regions.
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
10.1103/PHYSREVC.100.024902
