uncertainties and bugs in mmc and mum
Post on 30-Dec-2015
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Uncertainties and bugs in MMC and MUM. Dmitry Chirkin UC Berkeley. The problem. Propagation of 100 TeV muons through 300 meters of Frejus Rock. Different Bremsstrahlung implementations. In ice/water. Both bremsstrahlung implementations. In Standard Rock/water. Other cross sections. - PowerPoint PPT Presentation
TRANSCRIPT
Conclusions
• MMC e+- pair production cross section was corrected. It was underestimated by 5%, which led to a ~3% error in propagation of 100 TeV muons.
• MUM 8-point integration used for e+- cross section has an insufficient precision.
• ABB and KKP bremsstrahlung cross section parameterizations differ for hydrogen. KKP is used in AMANDA and the most recent.
• All cross sections now agree between MMC and MUM, and differences can be explained.
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