Tracing the origin of azimuthal gluon correlations in the color glass condensate
Lappi, T., Schenke, B., Schlichting, S., & Venugopalan, R. (2016). Tracing the origin of azimuthal gluon correlations in the color glass condensate. Journal of High Energy Physics, 2016(1), Article 61. https://doi.org/10.1007/JHEP01(2016)061
Published inJournal of High Energy Physics
© The Authors. This is an open access article funded by SCOAP3.
We examine the origins of azimuthal correlations observed in high energy proton-nucleus collisions by considering the simple example of the scattering of uncorrelated partons off color fields in a large nucleus. We demonstrate how the physics of fluctuating color fields in the color glass condensate (CGC) effective theory generates these azimuthal multiparticle correlations and compute the corresponding Fourier coefficients vn within different CGC approximation schemes. We discuss in detail the qualitative and quantitative differences between the different schemes. We will show how a recently introduced color field domain model that captures key features of the observed azimuthal correlations can be understood in the CGC effective theory as a model of non-Gaussian correlations in the target nucleus.
PublisherSpringer Berlin Heidelberg
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Related funder(s)Academy of Finland
Funding program(s)Research post as Academy Research Fellow, AoF
Additional information about fundingWe would like to thank A. Dumitru, A. Kovner and V. Skokov for useful discussions. T. L. is supported by the Academy of Finland, projects 267321 and 273464. BPS, SS, and RV are supported under DOE Contract No. DE-SC0012704. This research used computing resources of CSC – IT Center for Science in Espoo, Finland and of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. RV would like to thank the Institut f¨ur Theoretische Physik, Heidelberg, for kind hospitality and the Excellence Initiative of Heidelberg University for their support. SS gratefully acknowledges a Goldhaber Distinguished Fellowship from Brookhaven Science Associates. BPS is supported by a DOE Office of Science Early Career Award. TL thanks the BNL for hospitality during this work. ...
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