Difference between revisions of "Search for CP violation in the gamma-ray sky"
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statistics Q measures the handedness averaged over all patches in the sky. For | statistics Q measures the handedness averaged over all patches in the sky. For | ||
more details, refer to "Search for CP violation in the gamma-ray sky", Hiroyuki Tashiro, | more details, refer to "Search for CP violation in the gamma-ray sky", Hiroyuki Tashiro, | ||
| − | Wenlei Chen, Francesc Ferrer, and Tanmay Vachaspati, | + | Wenlei Chen, Francesc Ferrer, and Tanmay Vachaspati, [http://arxiv.org/abs/1310.4826 arxiv:1310.4826]. |
== Fermi Data == | == Fermi Data == | ||
Revision as of 15:42, 19 May 2014
Contents
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. The
statistics Q measures the handedness averaged over all patches in the sky. For
more details, refer to "Search for CP violation in the gamma-ray sky", Hiroyuki Tashiro,
Wenlei Chen, Francesc Ferrer, and Tanmay Vachaspati, arxiv:1310.4826.
Fermi Data
Galactic Latitude and Source Cuts
Galactic latitude and Source Cuts
Evaluation of CP Odd Statistic (Q)
Mathematica notebook (Vachaspati) File:Cpgamma-northsouth.nb
Monte Carlo Simulations
Results
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. On the left are results of Tashiro's routines; on the right are consistent results obtained using Ferrer's routines. 1*sigma spreads of the Monte Carlo simulations are shown as magenta error bars. The data points are the results from Fermi data together with 1*sigma standard errors. Points that deviate by more than 2*sigma, where sigma = max{Monte Carlo spread, standard error}, are colored in red.
