Why are all I$_{\mathrm{AA}}$ distributions constant for away p$_{\mathrm{Ta}}$ \textgreater 3 GeV/c in di-hadron correlations with trigger p$_{\mathrm{Tt}}$ \textless 20 GeV/c in Relativistic Heavy Ion Central Collisions?
ORAL
Abstract
In Relativistic Heavy Ion Collisions at RHIC and LHC an I$_{\mathrm{AA}}$ distribution is the measurement in di-hadron correlations of the ratio of the A$+$A to p$+$p associated away particle transverse momentum$_{\mathrm{\thinspace }}$(p$_{\mathrm{Ta}})$ distributions for trigger particles with a given p$_{\mathrm{Tt}}$. In all published measurements in Au$+$Au collisions at RHIC (c.m. energy 200 GeV) [PHENIX, PRL104, 252301 (2010)], [STAR, PLB760, 689 (2016)] and Pb$+$Pb collisions at LHC (c.m. energy 2.76 TeV) [ALICE, PLB763, 238 (2016)], the I$_{\mathrm{AA}}$ distribution decreases in the range 0\textless p$_{\mathrm{Ta}}$\textless 3 GeV/c and then becomes constant out to the measurement limit p$_{\mathrm{Ta}}$\textless 20 GeV/c. One possibility discussed is that jet fragments with p$_{\mathrm{Ta}}$\textgreater 3 GeV/c are sufficiently inside the jet cone that they don't lose energy by the BDMPSZ method [arXiv:hep-ph/0002198v2]
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Authors
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Michael Tannenbaum
Brookhaven National Laboratory