Overview

Measurements of azimuthal correlations at the Relativistic Heavy Ion Collider (RHIC) have shown an away-side that is suppressed in Au+Au collisions compared to proton+proton/Deuteron+proton collisions. Such suppression is taken as a signature of the predicted QCD dense medium. However, the near-side of the azimuthal correlations shows little modification. The near-side of such correlations is related to the ratio of the dihadron fragmentation function to the single one. As such, dihadron fragmentation functions shall provide a better basis for the interpretation of the near-side correlations. Dihadron fragmentation functions in p+p collisions also provide a baseline of such measurements in heavy ion collisions.

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9781244584679

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