Antares results and status

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Antaresresults and status

• Ronald Bruijn

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Outline

• Antares
• Status/Timeline
• Line 1 selected results
• Multiple lines selected results
• Conclusion

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EM Showers
muon
Position m
450 m
cm
Z
m
shower
Time ns
In addition to continuous energy loss, a muon
loses energy through stochastic processes
(Bremsstrahlung, pair-production). An E.M. shower
produces a signal that resembles a horizontal muon
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Line 1 Zenith angle distribution
Points data Bands Monte-Carlo
Relative acceptance
Neutrinos ?
e.m. showers and ghost solutions
downward
upward
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Line 1 Depth-intensity relation
Use detector acceptance to determine muon flux
Zenith angle corresponds
to depth
Vertical muon intensity vs. depth
First comparison of Antares data ! Reasonable
agreement with other experiments
(figure from PDG, Antares points superimposed)
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Line 1 Neutrino Candidate(s)?
Consider upward going events (suppresses
atmospheric muon background), apply increasingly
harder quality criteria and compare with
Monte-Carlo
At gt 10 hits, one event remains
Atm. muon
Remaining events
Position m
Points are data
Atm. Neutrinos
Hits required in reconstruction
Time ns
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Detector Performance
Effective area flux detection rate
New
Effective area m2
old
New reconstruction method improves the effective
area of the detector
Neutrino energy GeV
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EM Showers
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EM Showers

• EM Showers along muon tracks can be identified
  and counted
• Work by S. Mangano (NIKHEF)?

(Plot normalized to data)?
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Neutrinos
Zenith angle distribution after likelihood based
quality cut
Upgoing neutrino candidates
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• Neutrino Astronomy in the Mediterranean Sea has
  started !