dcorsika neutrino prediction

1
dcorsika neutrino prediction

• Kosta Schinarakis
• Wuppertal

2
Motivation

• Discrepancy between MC and measurement
• 50 to low MC (corsika) prediction for background
  muon flux (Desiati,Schröder)
• Too high predictions of atm. neutrinos (Böser)
• Try to connect directly
• the atm. muon and neutrino flux
• by using one source
• dcorsika

3
dcorsika
E-dist. primaries

• Sophisticated tool
• for the simulation
• of air showers

id-dist. primaries
4
Cross-checks

• 1/cos(q) dependence of muons

Same, with error bars
5
Cross-checks
0ltqlt15
15ltqlt30

• Ratio of muons produced by pions and kaons

45ltqlt60
30ltqlt45
75ltqlt90
60ltqlt75
Solid line Gaisser textbook
6
Cross-checks
integ. neutrinos
diff. neutrinos

• Comparison to
• the abs. flux,
• as predicted
• by Lipari

integ. muons
diff. muons
7
Current status

• Ratio of muons and neutrinos in air showers

m/n (E)

• Advantage
• more model independence
• less assumptions (CR,1.IA)
• Aim
• conclude neutrino flux
• out of muon data

m/n (E)
8
Current status

• Ratio of muons and neutrinos in air showers

m/n (q)
m/n (q)

• Advantage
• more model independence
• less assumptions (CR,1.IA)
• Aim
• conclude neutrino flux
• out of muon data

9
Next step

• Neutrino induced muons after earth propagation
• Predicted by nusim

Green std. nusim (lipari) Red mod. nusim
(dcorsika)
Green std. nusim (lipari) Red mod. nusim
(dcorsika)
10
Conclusion and To-Do-List

• dcorsika predicts correct neutrinos
• - no contradiction so far with lipari
• - but some more checks in progress
• Increase statistic -gt Increase energy range
• Closely check fluxes after earth propagation
  (nusim)