High Energy Verification Status and plan for PY2005-2006

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High Energy VerificationStatus and plan for
PY2005-2006

• Shigeru Yoshida (Chiba University)

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UHE/EHE in IceCube

• Energy Range (10PeV 10 EeV)
• Signal GZK, Topdown
• BG Atmospheric m and bundles
• Detection Channel m/t track with bunch of
  cascades

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A Primary Study.

• Looks encouraging!

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Down-going events dominate
Atmospheric m is strongly attenuated
Up
Down
S.Yoshida, R.Ishibashi, H.Miyamoto, PRD 69 103004
(2004)
Calculated by JULIeT
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GZK in energy-direction plane
GZK m
GZK t
Atmospheric m
High E
Low E
Calculated by JULIeT
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Events in Energy-direction plane
By Monte Carlo
GZK domain
Atm m domain
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IceCube EHE n Sensitivity
90 C.L. for 10 year observation

• S.Yoshida, R.Ishibashi, H.Miyamoto, PRD 69
  103004 (2004)

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Verification questions to answer

• of PE, DOM hits work as a first filter?
• Can we estimate energy deposit?
• Energy sec(q) plane really works?
• Is the partial IceCube array capable?

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Who ?

• Aya, Kotoyo, Sean, Albrecht (UW-Madison)
• Hiroko, Keiichi, Shigeru (Chiba)

More welcome!
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Offline software
Modules in IceTray
Numerical Calculation by JULIeT
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Juliet-interface

• Kotoyo (UW-Madison), Keiichi, Shigeru (Chiba)

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Weighting -module

• Aya (UW-Madison)

I3WeigherModuleJuliet

• PowerLawIndex
• JulietDifferentialFlux
• JulietPropagationMatrixNeutrinoFlux (GZK)
• JulietPropagationMatrixAtmMuonFlux (m)
• . . . .

MCWeightDict()
I3WeigherCheckerJuliet
MCEvent
Npe, NhitDOM, ..
RecoEvent
TTree
Primary
Cascade
Track
I3MCPrimary
I3MCTrack
I3MCCascade
Weight
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MC data quick analysis

• Aya (UW-Madison), Keiichi (Chiba)

By I3WeigherCheckerJuliet
of DOMs
Log(Max. Cascade E GeV)
Log(Energy GeV)
Log(Energy GeV)
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Energy loss profile in UHE/EHE
By JULIeT
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Cascade Reco

• Sean (UW-Madison)

By wf-llh-reco
1 PeV- 1000 PeV
of Events
Likelihood of waveform (Gary UW-Madison)
D Log(Energy)/ Log(Energy)
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To Do in near term

• MC data check and debugging
• Simple filter for High Energy events
• Complete Weighter-module (flux,
  interaction-weight)
• Effective Area estimation based on simple
  variables (Npe, cos(zenith) etc)
• Bright cascade reco PDF by Photonics
• Composite cascades EHE track reco
• Get Ready for analysis data from 10 strings

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After the 10 String deployment

• Filtering high energy data
• Comparison with simulation data
• (Note mostly UHE atmospheric m)
• Npe, Multiplicity, Waveform,
• cos(zenith), Energy,
• Verify a method to distinguish signal (GZK n)
  from background (Atm m)
• Standard Candle (N2 laser) 10PeV

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High energy verification organization
The gateway website http//www.ppl.phys.chiba-u.
jp/research/IceCube/EHE/

Monthly video conference
You are welcomed to join us!