Centrality and pseudorapidity dependence of the transverse energy density in pPb collisions at √sNN = 5.02 TeV
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physical Review C
Dergi ISSN 2469-9985 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 08-2019
Cilt / Sayı / Sayfa 100 / 2 / – DOI 10.1103/PhysRevC.100.024902
Makale Linki http://link.aps.org/pdf/10.1103/PhysRevC.100.024902
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
The almost hermetic coverage of the CMS detector is used to measure the distribution of transverse energy, Eτ, 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-goingbeam directions. This wide acceptance enables the study of correlations between well-separated angular regionsand makes the measurement a particularly powerful test of event generators. For minimum biaspPb collisionsthe maximum value of dEτ/dη is 22 GeV, which implies an Eτ per participant nucleon pair comparable to thatof peripheral PbPb collisions at √sNN=2.76 TeV. The increase of dEτ/dη with centrality is much stronger forthe lead-going side than for the proton-going side. The η dependence of dEτ/dη is sensitive to the η range inwhich the centrality variable is defined. Several modern generators are compared to these results but none isable to capture all aspects of the η and centrality dependence of the data and the correlations observed between different η regions. © 2019 CERN.
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