Search for CP violation in the gamma-ray sky

Schema

Illustration of the cut-sky with gamma rays distributed on it. Patches of radius R degrees are centered on the highest energy gamma rays. In those patches we test if the lower energy photons are distributed along left- or right-handed spirals.

Fermi Data

Fermi Data

Galactic Latitude and Source Cuts

Galactic latitude and Source Cuts

Evaluation of Q Statistic

Mathematica notebook: File:Cpgamma-northsouth.nb

Results

(Ferrer's routines)

CP odd statistics, Qx10^-6, versus patch radius R in degrees for the 6 different energy (E1,E2) combinations. E3 is always taken to be 50 GeV.