Measurement of high-image azimuthal anisotropy in charged hadron production from 2.76 Tev PbPb collisions at CMS

Measurements of the azimuthal anisotropy of charged hadrons are presented for PbPb collisions at image over an extended transverse momentum range. The data were collected with the CMS detector at the LHC. The anisotropy parameter (image) is extracted up to a significantly higher image region than previously achieved, by correlating charged tracks with respect to the event plane reconstructed using the energy deposited in forward-angle calorimeters. These new data can impose quantitative constraints on the details of in-medium parton energy loss models, particularly the influence of the path length and the shape of the interaction region.