Centrality categorization Rp(d)+A in high-energy collisions

dc.contributor.author Adare, Andrew
dc.contributor.author Ogilvie, Craig
dc.contributor.author Apadula, Nicole
dc.contributor.author Dion, Alan
dc.contributor.author Hill, John
dc.contributor.author Kempel, Todd
dc.contributor.author Lajoie, John
dc.contributor.author Lebedev, Alexandre
dc.contributor.author Ogilvie, Craig
dc.contributor.author Pei, H.
dc.contributor.author Rosati, Marzia
dc.contributor.author Silva, C.
dc.contributor.author Wei, Feng
dc.contributor.author et al.
dc.contributor.department Physics and Astronomy
dc.date 2018-02-18T10:57:12.000
dc.date.accessioned 2020-06-30T06:18:05Z
dc.date.available 2020-06-30T06:18:05Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.issued 2014-09-05
dc.description.abstract <p>High-energy proton- and deuteron-nucleus collisions provide an excellent tool for studying a wide array of physics effects, including modifications of parton distribution functions in nuclei, gluon saturation, and color neutralization and hadronization in a nuclear environment, among others. All of these effects are expected to have a significant dependence on the size of the nuclear target and the impact parameter of the collision, also known as the collision centrality. In this article, we detail a method for determining centrality classes in p(d) + A collisions via cuts on the multiplicity at backward rapidity (i.e., the nucleus-going direction) and for determining systematic uncertainties in this procedure. For d + Au collisions at root s(NN) = 200 GeV we find that the connection to geometry is confirmed by measuring the fraction of events in which a neutron from the deuteron does not interact with the nucleus. As an application, we consider the nuclear modification factors Rp(d)+A, for which there is a bias in the measured centrality-dependent yields owing to auto correlations between the process of interest and the backward-rapidity multiplicity. We determine the bias-correction factors within this framework. This method is further tested using the HIJING Monte Carlo generator. We find that for d + Au collisions at root s(NN) = 200 GeV, these bias corrections are small and vary by less than 5% (10%) up to p(T) = 10 (20) GeV/c. In contrast, for p + Pb collisions at v root s(NN) = 5.02 TeV we find that these bias factors are an order of magnitude larger and strongly pT dependent, likely attributable to the larger effect of multiparton interactions.</p>
dc.description.comments <p>This is an article from <em>Physical Review C</em> 90 (2014): 034902, doi:<a href="http://dx.doi.org/10.1103/PhysRevC.90.034902" target="_blank">10.1103/PhysRevC.90.034902</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/physastro_pubs/241/
dc.identifier.articleid 1241
dc.identifier.contextkey 10169952
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/241
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/56992
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/physastro_pubs/241/2014_Ogilvie_CentralityCategorization.pdf|||Fri Jan 14 22:52:44 UTC 2022
dc.source.uri 10.1103/PhysRevC.90.034902
dc.subject.disciplines Nuclear
dc.subject.disciplines Physics
dc.title Centrality categorization Rp(d)+A in high-energy collisions
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 0c7465f3-a076-4319-9513-6cd51186bbf6
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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