Suppression of Forward Pion Correlations in d Au Interactions at STAR - High Energy Physics - PhenomenologyReport as inadecuate




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Abstract: During the 2008 run RHIC provided high luminosity in both p+p and d+Aucollisions at $\sqrt{s {NN}}=200GeV$. Electromagnetic calorimeter acceptance inSTAR was enhanced by the new Forward Meson Spectrometer FMS, and is nowalmost contiguous from $-1<\eta<4$ over the full azimuth. This large acceptanceprovides sensitivity to the gluon density in the nucleus down to $x\approx10^{-3}$. Measurements of the azimuthal correlation between a forward $\pi^0$and an associated particle at large rapidity are sensitive to the low-$x$ gluondensity. Data exhibit the qualitative features expected from gluon saturation.A comparison to calculations using the Color Glass Condensate CGC model ispresented.



Author: Ermes Braidot, for the STAR collaboration

Source: https://arxiv.org/







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