Centrality and pseudorapidity dependence of the transverse energy density in pPb collisions ats root s(NN)=5.02 TeV

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dc.contributor.authorCMS Collaboration
dc.contributor.authorBuccilli, A.
dc.contributor.authorCooper, S.I.
dc.contributor.authorHenderson, C.
dc.contributor.authorRumerio, P.
dc.contributor.authorWest, C.
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dc.date.accessioned2022-08-02T15:21:15Z
dc.date.available2022-08-02T15:21:15Z
dc.date.issued2019
dc.description.abstractThe almost hermetic coverage of the CMS detector is used to measure the distribution of transverse energy, \({E}_{T}\), over 13.2 units of pseudorapidity, \(\eta \), for \(p\text{Pb}\) collisions at a center-of-mass energy per nucleon pair of \(\sqrt{{s}_{{}_{\mathrm{NN}}}}=5.02\phantom{\rule{0.16em}{0ex}}\text{TeV}\). The huge angular acceptance exploits the fact that the CASTOR calorimeter at \(-6.6<\eta <-5.2\) 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 \(p\text{Pb}\) collisions the maximum value of \(d{E}_{T}/d\eta \) is \(22\phantom{\rule{0.16em}{0ex}}\text{GeV}\), which implies an \({E}_{T}\) per participant nucleon pair comparable to that of peripheral PbPb collisions at \(\sqrt{{s}_{{}_{\mathrm{NN}}}}=2.76\phantom{\rule{0.16em}{0ex}}\text{TeV}\). The increase of \(d{E}_{T}/d\eta \) with centrality is much stronger for the lead-going side than for the proton-going side. The \(\eta \) dependence of \(d{E}_{T}/d\eta \) is sensitive to the \(\eta \) 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 \(\eta \) and centrality dependence of the data and the correlations observed between different \(\eta \) regions.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationSirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Frühwirth, R., Ghete, V. M., Hrubec, J., Jeitler, M., Krammer, N., Krätschmer, I., … Liko, D. (2019). Centrality and pseudorapidity dependence of the transverse energy density inpPbcollisions at\sqrt{s_{\mathrm{NN}}}= 5.02 TeV. In Physical Review C (Vol. 100, Issue 2). American Physical Society (APS). https://doi.org/10.1103/physrevc.100.024902
dc.identifier.doi10.1103/PhysRevC.100.024902
dc.identifier.urihttps://ir.ua.edu/handle/123456789/9196
dc.languageEnglish
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectPLUS AU COLLISIONS
dc.subjectP-PB COLLISIONS
dc.subjectRAPIDITY LOSS
dc.subjectMULTIPLICITY
dc.subjectCOLLECTIVITY
dc.subjectPhysics, Nuclear
dc.subjectPhysics
dc.titleCentrality and pseudorapidity dependence of the transverse energy density in pPb collisions ats root s(NN)=5.02 TeVen_US
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dc.typeArticle
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