Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector...

55
Muon Energy Spectrum Patrick Berghaus IceCube Collaboration Meeting Spring 2009

Transcript of Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector...

Page 1: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

Muon Energy Spectrum

Patrick BerghausIceCube Collaboration Meeting

Spring 2009

Page 2: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

2

Detector Calibration

High Statistics from atmospheric muonsDistributions near the horizon sensitive to:

Zenith Angle ResolutionMisreconstructed Background

High­Energy Events

Systematics discovered in the course of this analysis:See PB talk in Muon Session

Page 3: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

3

Diffuse Analyses

High­Energy EventsValidity of lepton production modelsCR composition effects

Page 4: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

4

CR Physics

CR compositionHadron production in nn interactionsAir Shower Models

Page 5: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

5

Muon Spectrum

Page 6: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

6

G.D. Barr, T.K. Gaisser, S. Robbins, T. Stanev, astro­ph/0611266

LHC

1 TeVPrimary Nucleon Energy

Pion

 Ene

rgy

Pion Production

Page 7: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

7

Knee:≃3PeV

Ankle:≃3EeV

2nd Knee:≃40PeV≃­2.7 ≃­3.0

≃­3.2

≃­2.4­2.7

Page 8: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

8

p

Fe

Gyroradius:

“Leaking Box”

Page 9: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

9

Composition Change at ≥few PeV

Show

er M

axim

um

Extended Air Shower Measurements: Altitude of Shower Maximum

Page 10: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

10

Rigidity Mass Constant

poly­gonato(Hoerandel)

astro­ph/0210453

Page 11: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

11

astro­ph/0505413

CASKADE CompositionMeasurement

Page 12: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

12

≃­3.7≃­4.0

CR Composition and Muon Energy

Page 13: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

13

Prompt Muons: Out of Reach!

ConventionalMuons(near horizon)

1PeV

Page 14: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

14

Source: Dima

minimum ionizing

Calorimetric Response for Bundles

Page 15: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

15

1.5km(283GeV)

2.5km(1.12TeV) 10km (81°)

20km (85.5°)(38.6TeV)

20km (82°)

10km (74°)(4.88TeV)

Slant Depth

Page 16: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

16

Slant Depth and Bundle Multiplicity

Page 17: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

17

zen

“Good” Muons “Bad”

Muons

Page 18: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

18

0:zen,llh>70° && muonfilter1: Nchan>152:parab<6°3: llhred(2.5)<84: lf,llh<0.2rad5: 100m<Ldir(C)<800m6: 0.15<vlf<0.4 &&abs(smooth)<0.6 

wiki.icecube.wisc.edu/index.php/Muon_Energy_Spectrum/Level_3

L3 Cuts

Page 19: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

19

Cut 0:  llhred(2.5)<7.25Cut 1:  llhred(2.5)<7.1 parab,zen<2°Cut 2:  llhred(2.5)<7.0 parab,zen<1.4°

wiki.icecube.wisc.edu/index.php/Muon_Energy_Spectrum/Final_Cuts

FinalCut Level

Page 20: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

20

Slant Depth Zenith Angle

diff

int

Page 21: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

21

Total Charge

True Zenith

Neutrinos“Reference Cut”:From All­Sky Analysis

Page 22: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

22

notracksintail

∣True Zenith – Reconstructed Zenith∣

Page 23: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

23

Credit: Keiichi

CR Energy

Page 24: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

24

HighestMuon Energyin Shower(at surface)

Page 25: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

25

Zenith Angle

±0.1%

Page 26: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

26

measured slant depth

true slant depth

Slant Depth:Correction

Page 27: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

27

Slant Depth

50 TeV

Track Multiplicityin Detector

Max. MuonSurfaceEnergy

Page 28: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

28

Slant Depth

±3%

Page 29: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

29

Data/MC: Slant Depth

1

Angular resolution too lowto go further, better in the future!

Page 30: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

30

Pulses(Q

tot similar)

High­Multiplicity BundlesTrack 

Multiplicityin Detector

Max. MuonSurfaceEnergy

Page 31: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

31

Pulses

2.5­3 times more muons for Fe than p

“Elbert­Formula”

Page 32: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

32

Total Charge

2.5­3 times more muons for Fe than p

“Elbert­Formula”

Page 33: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

33

Data/MC: Npulse and Qtot

1

Page 34: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

34

(Qtot / Npulse)

Page 35: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

35

Surface Energy

Estimator

200 TeV

Track Multiplicityin Detector

Max. MuonSurfaceEnergy

Page 36: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

36

unit arealinear scale

events per secondlogarithmic scale

Energy of most energetic muon in shower

by ẽ­bin

Page 37: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

37

Data/MC: ẽ(Npulse) and ẽ(Qtot)

1

Page 38: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

38

ẽ(pulse)

ẽ(charge)

Data

MC

Page 39: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

39

Average Chargeper Pulse

Invariant!

Page 40: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

40

Additional Cut:Average Charge

per Pulse< 3

1

“Balloon”/Droop Correction

Page 41: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

41

Data/MC: ẽ(Npulse) and ẽ(Qtot)

1

Page 42: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

42

Data/MC: Npulse and Qtot

1 1

Page 43: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

43

Final Distribution (1 month IC22)

Expect 10 events in IC22 

for const.comp.

Page 44: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

44

Ratio Data/MC (1 month IC22)

Page 45: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

45

Muon Spectrum

Page 46: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

46

IC22 (1month), PRELIMINARY!

Muon Spectrum

Page 47: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

47

ConclusionAtmospheric muons are indispensable for

 investigation of detector systematics

Diffuse analysis is very difficult without understanding HE muons

IceCube has huge potential for CR physics

More information:wiki.icecube.wisc.edu/index.php/Muon_Energy_Spectrum 

Page 48: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

48

Backup Slides

Page 49: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

49

cogz<­100m: ẽ(Npulse) and ẽ(Qtot)

1 1

Page 50: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

50

cogz<­100m: Npulse and Qtot

1 1

Page 51: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

51

Page 52: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

52

Page 53: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

53

Page 54: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

54

Page 55: Muon Energy Spectrumberghaus/muspec_mad_09.pdf · Muon Energy Spectrum Patrick Berghaus 2 Detector Calibration High Statistics from atmospheric muons Distributions near the horizon

  Muon Energy SpectrumPatrick Berghaus

55