Higher harmonic jet tomography as a probe of fluctuating initial condition geometries in A+A

May 27, 2011, 3:40 PM
Salon Verdi AB (Imperial Palace)

Salon Verdi AB

Imperial Palace

Parallel Jets Jets


Barbara Betz (Columbia University)


While 2nd Fourier harmonics of jet quenching have been thoroughly explored in the literature and shown to be sensitive to (1) the underlying jet path length dependence of energy loss and (2) the differences between the mean eccentricity predicted by Glauber and CGC/KLN models of initial conditions, the sensitivity of higher harmonics, v_n(p_T, b), to differences between the fluctuation spectrum of geometries has remained relatively unexplored. We demonstrate that higher azimuthal jet harmonics (n>2) of R_AA(p_T,phi) and I_AA(p_T,phi) are remarkably insensitive to the differences of geometrical density fluctuations comparing between Glauber and CGC/KLN models of the initial conditions. Therefore, the differential elliptic v_2(p_T) vs. v_2^(I_AA)(p_T) moment correlation between the 2nd moment of monojet R_AA and dijet I_AA nuclear modifications factors remains the most sensitive probe to differentiate between Glauber and CGC/KLN initial state sQGP geometries.

Primary author

Barbara Betz (Columbia University)


Giorgio Torrieri (Frankfurt Institute for Advanced Studies) Miklos Gyulassy (Columbia University)

Presentation materials