Status of LBL Neutrino Experiments

of 42 /42
Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 1 Status of LBL Neutrino Experiments Caren Hagner Universität Hamburg • SK atmospheric neutrinos, confirmation by K2K • MINOS • OPERA • (Future: T2K and Nova)

Embed Size (px)

description

Status of LBL Neutrino Experiments. Caren Hagner Universit ät Hamburg. SK atmospheric neutrinos, confirmation by K2K MINOS OPERA (Future: T2K and Nova). SuperKamiokande. Atmospheric Neutrino Results. - PowerPoint PPT Presentation

Transcript of Status of LBL Neutrino Experiments

Page 1: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 1

Status of LBL Neutrino ExperimentsStatus of LBL Neutrino Experiments

Caren Hagner

Universität Hamburg

• SK atmospheric neutrinos, confirmation by K2K• MINOS• OPERA• (Future: T2K and Nova)

Page 2: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 2

SuperKamiokande SuperKamiokande

L/E Analysis (PRL 93 (2004) 101801),Best Fit:sin22θ = 1.02 Δm2 = 2.4×10-3 eV2

Full SK-I data set, 90% CL (hep-ex/0501064):

sin22θ > 0.92 1.5·10-3 eV2<Δm2<3.4·10-3 eV2

Atmospheric Neutrino Results

Page 3: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 3

SuperKamiokande SuperKamiokande

• Analysis for vτ appearance:SK-I data setvτCC (≈ 63% DIS, Ev > 3.5 GeV) hadronic τ-decays (≈ 65%)Primary background:atm. v producing multiple π’s

• Statistical discrimination of signal vs background:Likelihood & neural network techniques

• Analysis for vτ appearance:SK-I data setvτCC (≈ 63% DIS, Ev > 3.5 GeV) hadronic τ-decays (≈ 65%)Primary background:atm. v producing multiple π’s

• Statistical discrimination of signal vs background:Likelihood & neural network techniques

)sys.()stat.(48138 :Best Fit 1532

232atm eV104.2mfor

, 26(sys.)78 :Expected

No tau appearance excluded @ 2.4σ

“A Measurement of Atm. Neutrino Flux Consistent with Tau Neutrino Appearance”, PRL 97,171801 (2006)

Page 4: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 4

K2KK2K

"Measurement of Neutrino Oscillation by the K2K Experiment"The K2K collaboration, M. H. Ahn et al, hep-ex/0606032, Phys. Rev. D 74, 072003 (2006)

no oscill

oscill, best fit:

sin2 2θ=1.0,Δm2=2.8·10-3eV2

Page 5: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 5

MINOSMINOS

Page 6: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 6

MINOS DetectorsMINOS Detectors

Far Detector Near Detector

5.4 ktons, 8830m484 steel/scintillator planes

1 kton, 4515m 282 steel, 153 scintillator planes

Page 7: Status of  LBL Neutrino Experiments

MINOS: Event Topologies

CC Event NC Event e CC EventUZ

VZ

long track+ hadronic activity at vertex

short, with typical EM shower profile

short event, often diffuse

3.5m 1.8m 2.3m

Page 8: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 8

MINOS-NuMi BeamMINOS-NuMi Beam

Time

PO

T/S

pill

(x10

12)

Record intensity! 4 x 1013 pot/spill

Sh

utd

ow

n

1st year result

Special Runs

Year 2

> 2.5 x 1020 pot

1.27 x 1020 pot

Page 9: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 9

MINOS Results: Fit to Oscillation HypothesisMINOS Results: Fit to Oscillation Hypothesis

Measurement errors are 1σ, 1 DOFFit constrained to sin2(2θ)≤1

98.0ionNormalizat

syst) (stat 00.12sin

eV10syst) (stat 74.2m

13.0232

2344.026.0

232

nsys

1j

2s

2j

nbins

1iiiiii

2

jseolno2oe2

(for 1.27·1020pot)

"Observation of muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam," hep-ex/0607088Phys. Rev. Lett. 97, 191801 (2006)

Page 10: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 10

MINOS: Allowed RegionsMINOS: Allowed Regions

• Fit includes penalty terms for three main systematic uncertainties

• Fit is constrained to physical region: sin2(2θ23)≤1

13.0232

2344.026.0

232

00.12sin

eV1074.2m

Page 11: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 11

MINOS: Future SensitivityMINOS: Future Sensitivity

Page 12: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 12

MINOS – Future ProspectsMINOS – Future Prospects

• Compare Near/Far NC energy spectrum. Sensitive to νμ→νsterile, ν decay.

• First: Understand NC spectrum in near detector.– NC events prone to intensity related reco issues– Study spills with a lot of events, and spills with fewer events

• Compare Near/Far NC energy spectrum. Sensitive to νμ→νsterile, ν decay.

• First: Understand NC spectrum in near detector.– NC events prone to intensity related reco issues– Study spills with a lot of events, and spills with fewer events

High Multiplicity Low Multiplicity

Page 13: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 13

MINOS: Neutrino Time of FlightMINOS: Neutrino Time of Flight

Page 14: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 14

OPERAOPERA

732 km (2.44ms)

? vv

LNGS

FIRST BEAM in August 2006

Page 15: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 15

OPERA: CNGS beamOPERA: CNGS beam

%4/ vv

%87.0/)( vvv ee

GeV17vE

400GeV p on graphite target

4.5·1019pot/year

Page 16: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 16

OPERA: Detection of vτOPERA: Detection of vτ

W

τ-

p,n hadrons

15% )(

48% )(

18%

18%

0

0

vn

vn

vve

vv

e

τ-decay:

Lead

Emulsions

τ

1 mm

μ-

v

v

Hadrons

Typical topology of τ-decay:“Kink” within 1mm from vertex

Page 17: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 17

OPERA Target: Lead/Emulsion BricksOPERA Target: Lead/Emulsion Bricks

Lead/Emulsion Brick (total ≈ 200000)

10X0

8kg

Page 18: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 18

OPERA - DetectorOPERA - Detector

Supermodule 1 Supermodule 2

Page 19: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 19

OPERA - DetectorOPERA - DetectorSupermodule 1

Target Region:- Target Tracker (Scintillator)- Lead/Emulsion Bricks (100.000 per Supermodule)

Page 20: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 20

OPERA - DetectorOPERA - DetectorSupermodule 1

Magnet-Region:Iron &

RPC Planes

B B

Precision Tracker:6 Planes of Drifttubes

Target

v μ

X

Page 21: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 21

OPERA: Expected SignalOPERA: Expected Signal

0.235.63.6 µ

0.236.74.3 e

0.325.93.8 h

0.221.71.1 3h

Background Δm2 = 3.0·10-3 eV2 Δm2 = 2.4·10-3 eV2

decay channel

19.9 1.0ALL

Signal

12.8

Main background sources:- charm production and decays- hadron re-interactions in lead- large-angle μ scattering in lead

full mixing, 5 years run @ 4.5x1019 p.o.t. / year

Event rates (~1.7 Kton, 4.5·1019 pot/year)

~ 6200 events/year (CC+NC)

~ 30 events/day (CC+NC)

~ 25 vτ CC events/year (for Δm2 =2.4·10-3eV2)

Page 22: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 22

OPERA – Physics PotentialOPERA – Physics Potential

SK 90% CL(L/E analysis)

Opera nominal

Opera with beam upgrade and 30% bck reduction

Opera, with beam upgrade (1.5)

Opera with 30% bck reduction

90 % CL Sensitivity F&C

Opera nominal 80% Target mass

SK 90% CL(L/E analysis)

Opera nominal

Opera with beam upgrade and 30% bck reduction

Opera, with beam upgrade (1.5)

Opera with 30% bck reduction

90 % CL Sensitivity F&C

Opera nominal 80% Target mass

Minos 90% CL

dis

covery

pro

bab

ility

%

Δm2 in 10-2 eV2

Page 23: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 23

OPERA – Brick Manipulating SystemOPERA – Brick Manipulating System

suction cup vehicle

Loading Station

Robot to insert/extract bricks

Page 24: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 24

OPERA – Brick Assembly MachineOPERA – Brick Assembly Machine

• Lead/Emulsion bricks are assembled underground in GS• Darkroom• 5 robotized parallel stations

• Lead/Emulsion bricks are assembled underground in GS• Darkroom• 5 robotized parallel stations

BAM at LNGS

Page 25: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 25

OPERA: Brick FillingOPERA: Brick Filling

• Opera brick filling started• Must improve speed of BAM,

BMS, coordination lead production-BAM-BMS.

• O(2000) bricks inserted• All bricks inserted:

March 2008

• Opera brick filling started• Must improve speed of BAM,

BMS, coordination lead production-BAM-BMS.

• O(2000) bricks inserted• All bricks inserted:

March 2008

But, at the moment:Only 75% of emulsion films funded

Page 26: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 26

OPERA: First CNGS Beam OPERA: First CNGS Beam

• Run August 2006:7.6·1017pot (1.7·1013pot/extraction, 70% of nominal intensity)319 events in time with beam (300 expected)

• Run October 2006:0.6·1017pot (1.2·1013pot/extraction)stopped because of water leak in reflector

• Electronic Detectors only (No lead/emulsion bricks)

• Run August 2006:7.6·1017pot (1.7·1013pot/extraction, 70% of nominal intensity)319 events in time with beam (300 expected)

• Run October 2006:0.6·1017pot (1.2·1013pot/extraction)stopped because of water leak in reflector

• Electronic Detectors only (No lead/emulsion bricks)

August 2006 August 2006

Opera Coll., New J. Phys. 8 (2006) 303

Pot vs Time Ev. vs Time

Page 27: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 27

OPERA: Origin of Beam EventsOPERA: Origin of Beam Events

11% 7.5%5 %

0.6 % 1 %

1 % 0.3 %68 %rock

muons

uncertain : 8.5 %

Spectrometer 1 Spectrometer 2

Target1 Target2

Page 28: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 28

Direction of CNGS neutrino beamDirection of CNGS neutrino beam

3.5o

Page 29: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 29

CNGS beam direction measurementCNGS beam direction measurement

August Run result: <> = 3.4 ± 0.3 degrees

y >0

y <0

y

z

μ zenith angle

Page 30: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 30

CNGS beam timing measurementCNGS beam timing measurement

Event selection via GPS timing information

50 ms10.5 μs 10.5 μs

Page 31: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 31

OPERA CNGS beam eventsOPERA CNGS beam events

vCC in rock (rock muon)

Page 32: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 32

OPERA: real event OPERA: real event

vCC in target tracker

Page 33: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 33

OPERAOPERA

vCC in Magnet

Page 34: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 34

OPERAOPERA

vNC candidate

Page 35: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 35

OPERAOPERA

μ bundle (cosmics)

Page 36: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 36

CNGS August Run: μ momentumCNGS August Run: μ momentum

prelim.

RPC’s in magnet region

(Here: only RPC’swill improve with drifttubes)

Page 37: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 37

Normalization Check: vμ CC in MagnetNormalization Check: vμ CC in Magnet

• Trigger + On Time + μ Id (> 10 RPC plane) + vertex in magnet OR first 2 TT + fid. Vol.• no χ2 cut on μ track

• vCC in magnets selection efficiency 52% • very pure sample, NC contamination 4% (1,1 event)

August + October: Data = 36 ± 6 MC = 29.9

October only:

Data = 1MC = 2.2

vert. angle (rad)

Page 38: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 38

Connection CS – Target TrackerConnection CS – Target Tracker

Brick

Changeable

sheets

Target Tracker

1st emulsion sheet

2nd emulsion sheet

100 m

10 m

1 m

changeable cheet doublet

(CS) brick

Angular difference betw. prediction/found track <10 mrad (dominated by electronic detector resolution)

Page 39: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 39

OPERA Future PlansOPERA Future Plans

CNGS:• CNGS Beam in 2007:

repairs at horn/reflectorbeam in september/october possible (1.2-1.6·1019pot/day)

• CNGS Beam in 2008:4.09·1019pot (extraction intensity 4.4·1013pot)

• Multi turn extraction scheme (virtually loss less)

Detector:Brick filling started, ready for next phase:Waiting for first neutrino interaction in emulsions…

CNGS:• CNGS Beam in 2007:

repairs at horn/reflectorbeam in september/october possible (1.2-1.6·1019pot/day)

• CNGS Beam in 2008:4.09·1019pot (extraction intensity 4.4·1013pot)

• Multi turn extraction scheme (virtually loss less)

Detector:Brick filling started, ready for next phase:Waiting for first neutrino interaction in emulsions…

Page 40: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 40

EndEnd

Page 41: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 41

Leaking Drain ConnectionLeaking Drain Connection

Outer conductor (Al)Ceramic insulator (500V)

(brazed to the Ti joints)

Clamps for vapor tightness

Rupture point – leak!!

Bellows to give (some) flexibility

Titanium joints

Page 42: Status of  LBL Neutrino Experiments

Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007 42

Radial beam profile at Gran SassoRadial beam profile at Gran Sasso