Extracting the size of the cosmic electron-positron anomaly

Details Extracting the size of the cosmic electron-positron anomaly Extracting the size of the cosmic electron-positron anomaly

2011-06-21

arxiv.org/abs/1106.4138v3

ApJ, 749 (2012) 184

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

35 pages with 4 Figures and 2 Tables. References added, accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/749/2/184

We isolated the anomalous part of the cosmic electron-positron flux within a Bayesian likelihood analysis. Using 219 recent cosmic ray spectral data points, we inferred the values of selected cosmic ray propagation parameters. In the context of the propagation model coded in GalProp, we found a significant tension between the electron positron related and the rest of the fluxes. Interpreting this tension as the presence of an anomalous component in the electron-positron related data, we calculated background predictions for PAMELA and Fermi-LAT based on the non-electron-positron related fluxes. We found a deviation between the data and the predicted background even when uncertainties, including systematics, were taken into account. We identified this deviation with the anomalous electron-positron contribution. We briefly compared this model independent signal to some theoretical results predicting such an anomaly.

Affiliated with

Also associated with

No associations

Rating

Extracting the size of the cosmic electron-positron anomaly does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Extracting the size of the cosmic electron-positron anomaly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extracting the size of the cosmic electron-positron anomaly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-178186