LBNF/DUNE and the Hunt for Leptonic Brookhaven National Lab CP - - PowerPoint PPT Presentation

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LBNF/DUNE and the Hunt for Leptonic Brookhaven National Lab CP - - PowerPoint PPT Presentation

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LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai LBNF/DUNE and the Hunt for Leptonic Brookhaven National Lab CP Violation Introduction FPCP 2016, 6-9 June 2016, Caltech CP in SM CPV and other New Physics Current

slide-1
SLIDE 1

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

LBNF/DUNE and the Hunt for Leptonic CP Violation

FPCP 2016, 6-9 June 2016, Caltech

Mary Bishai Brookhaven National Lab June 8, 2016

1 / 41

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SLIDE 2

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Outline

1

Introduction CP in ν SM CPV and other New Physics

2

Current Experimental Landscape

3

LBNF/DUNE

4

Conclusion

2 / 41

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SLIDE 3

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

CP Violation in PMNS and CKM

In 3-flavor mixing the degree of CP violation is determined by the Jarlskog invariant: JPMNS

CP

≡ 1

8 sin 2θ12 sin 2θ13 sin 2θ23 cos θ13 sin δCP.

0.025 0.03 0.035 0.04 JCP

max = c12 s12 c23 s23 c 2 13 s13

5 10 15 ∆χ

2

  • 0.04
  • 0.02

0.02 0.04 JCP = JCP

max sinδCP

NO, IO (LEM) NO, IO (LID) NuFIT 2.1 (2016)

(JHEP 11 (2014) 052, arXiv:1409.5439)

Given the current best-fit values of the ν mixing angles : JPMNS

CP

≈ 3 × 10−2 sin δCP. For CKM: JCKM

CP

≈ 3 × 10−5, despite the large value of δCKM

CP

≈ 70◦.

3 / 41

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SLIDE 4

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Oscillations in the 3-flavor ν SM

In the ν 3-flavor model matter/anti-matter asymmetries in neutrinos are best probed using νµ/¯ νµ → νe/¯ νe oscillations (or vice versa).With

terms up to second order in α ≡ ∆m2

21/∆m2 31 = 0.03 and sin2 θ13 = 0.02, (M. Freund. Phys. Rev.

D 64, 053003): P(νµ → νe) ∼ = P(νe → νµ) ∼ = P0

  • θ13

+ Psin δ

CP violating

+ Pcos δ

CP conserving

+ P3

  • solar oscillation

where for oscillations in vacuum: P0 = sin2 θ23sin2 2θ13 sin2(∆), sin2(2θ13) (A − 1)2 Psin δ = α 8Jcp sin3(∆), 8Jcp A(1 − A) Pcos δ = α 8Jcp cot δCP cos ∆ sin2(∆), 8Jcp cot δCP A(1 − A) xx P3 = α2cos2 θ23sin2 2θ12 sin2(∆), sin2(2θ12) A2 and where ∆ = ∆m2

31L/4E

For ¯ νµ → ¯ νe, Psin δ → −Psin δ

4 / 41

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SLIDE 5

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Oscillations in the 3-flavor ν SM

In the ν 3-flavor model matter/anti-matter asymmetries in neutrinos are best probed using νµ/¯ νµ → νe/¯ νe oscillations (or vice versa).With

terms up to second order in α ≡ ∆m2

21/∆m2 31 = 0.03 and sin2 θ13 = 0.02, (M. Freund. Phys. Rev.

D 64, 053003): P(νµ → νe) ∼ = P(νe → νµ) ∼ = P0

  • θ13

+ Psin δ

CP violating

+ Pcos δ

CP conserving

+ P3

  • solar oscillation

where for oscillations in matter with constant density: P0 = sin2 θ23 sin2 2θ13 (A − 1)2 sin2[(A − 1)∆], Psin δ = α 8Jcp A(1 − A) sin ∆ sin(A∆) sin[(1 − A)∆], Pcos δ = α8Jcp cot δCP A(1 − A) cos ∆ sin(A∆) sin[(1 − A)∆], P3 = α2cos2 θ23 sin2 2θ12 A2 sin2(A∆), and where ∆ = ∆m2

31L/4E

and A = √ 2GFNe2E/∆m2

31.

For ¯ νµ → ¯ νe, Psin δ → −Psin δ

5 / 41

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SLIDE 6

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Oscillations in the 3-flavor ν SM

The νµ → νe probability maxima due to the atmospheric oscillation scale occur at

L (km) En(GeV) = π 2

  • (2n − 1)

1.27 × ∆m2

31(eV2)

≈ (2n − 1) × 515 km GeV

Neutrino Energy/Baseline (GeV/km) 0.0005 0.001 0.0015 0.002 0.0025 0.003 0.0035 0.004 0.0045 0.005 )

e

ν →

µ

ν P( 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2

(a) Electron Neutrino Appearance Probabilty vs. L/E = 0

cp

δ Vacuum oscillations, all terms, term only

13

θ 2

2

sin Solar oscillation term only 6 / 41

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SLIDE 7

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Oscillations in the 3-flavor ν SM

The νµ → νe probability maxima due to the atmospheric oscillation scale occur at

L (km) En(GeV) = π 2

  • (2n − 1)

1.27 × ∆m2

31(eV2)

≈ (2n − 1) × 515 km GeV

Neutrino Energy/Baseline (GeV/km) 0.0005 0.001 0.0015 0.002 0.0025 0.003 0.0035 0.004 0.0045 0.005 )

e

ν →

µ

ν P( 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2

(b) Impact of CP Phase on Vacuum Oscillations = 0

cp

δ Vacuum oscillations, all terms, /2 π = +

cp

δ All terms, /2 π = -

cp

δ All terms, π =

cp

δ All terms, 7 / 41

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SLIDE 8

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Oscillations in the 3-flavor ν SM

The νµ → νe probability maxima due to the atmospheric oscillation scale occur at

L (km) En(GeV) = π 2

  • (2n − 1)

1.27 × ∆m2

31(eV2)

≈ (2n − 1) × 515 km GeV

Neutrino Energy/Baseline (GeV/km) 0.0005 0.001 0.0015 0.002 0.0025 0.003 0.0035 0.004 0.0045 0.005 )

e

ν →

µ

ν P( 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2

= 0)

cp

δ (c) Impact of Matter Effects on Oscillations (

= 0

cp

δ Vacuum oscillations, all terms, Matter effect at 1000km, NH Matter effect at 2000km, NH Matter effect at 3000km, NH Matter effect at 3000km, IH

8 / 41

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SLIDE 9

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Impact of Sterile Neutrinos on Long-Baseline ν Oscillations

L/E (km/GeV)

  • 2

10

  • 1

10 1 10

2

10

3

10

4

10 Probability 0.2 0.4 0.6 0.8 1 1.2

2

= 0.05 eV

41 2

m ∆ )

µ

ν →

µ

ν

  • Std. Osc. P(

5) × )(

e

ν →

µ

ν P( )

µ

ν →

µ

ν P( )

τ

ν →

µ

ν P( )

s

ν →

µ

ν 1-P(

ND FD

Neutrino Energy (GeV)

  • 1

10 1 10

2

10 Neutrino Energy (GeV)

  • 1

10 1 10

2

10

9 / 41

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SLIDE 10

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Impact of Sterile Neutrinos on Long-Baseline ν Oscillations

L/E (km/GeV)

  • 2

10

  • 1

10 1 10

2

10

3

10

4

10 Probability 0.2 0.4 0.6 0.8 1 1.2

2

= 0.50 eV

41 2

m ∆ )

µ

ν →

µ

ν

  • Std. Osc. P(

5) × )(

e

ν →

µ

ν P( )

µ

ν →

µ

ν P( )

τ

ν →

µ

ν P( )

s

ν →

µ

ν 1-P(

ND FD

Neutrino Energy (GeV)

  • 1

10 1 10

2

10 Neutrino Energy (GeV)

  • 1

10 1 10

2

10

10 / 41

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SLIDE 11

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Impact of Sterile Neutrinos on Long-Baseline ν Oscillations

L/E (km/GeV)

  • 2

10

  • 1

10 1 10

2

10

3

10

4

10 Probability 0.2 0.4 0.6 0.8 1 1.2

2

= 50.00 eV

41 2

m ∆ )

µ

ν →

µ

ν

  • Std. Osc. P(

5) × )(

e

ν →

µ

ν P( )

µ

ν →

µ

ν P( )

τ

ν →

µ

ν P( )

s

ν →

µ

ν 1-P(

ND FD

Neutrino Energy (GeV)

  • 1

10 1 10

2

10 Neutrino Energy (GeV)

  • 1

10 1 10

2

10

11 / 41

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SLIDE 12

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

CP Violation in ν SM

The charge-parity (CP) asymmetry is defined as Acp = P(νµ → νe) − P(¯ νµ → ¯ νe) P(νµ → νe) + P(¯ νµ → ¯ νe) Acp ∼ cos θ23 sin 2θ12sin δ sin θ23 sin θ13 ∆m2

21L

4Eν

  • + matter effects
  • W. Marciano, Z. Parsa, Nucl.Phys.Proc.Suppl. 221 (2011)

The CP phase δcp is unknown. CP is violated when δcp = 0, π

The 4 most important things to know about ν CPV

Acp ∝ 1/ sin θ13 ⇒ Large θ13 makes CPV searches HARDER. Acp ∝ 1/ tan θ23 ⇒ Large sin(θ23) = smaller CPV (octant!) Acp ∝ 1/Eν ⇒ CP asymmetries are larger at lower energies Acp ∝ L ⇒ CP asymmetries are larger at longer baselines

12 / 41

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SLIDE 13

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

CP Asymmetry 3-flavor and with a Sterile Neutrino

∆m2

41 ∼ 1 eV2

The integrated CP asymmetry at the DUNE/LBNF baseline of 1300km : (D. Dutta et. al. JHEP 1511 (2015) 039; arXiv:1508.06275) Observation of a CP asymmetry is not sufficient to determine its origin.

13 / 41

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SLIDE 14

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Non-Standard Interactions and CP Asymmetries

14 / 41

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SLIDE 15

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Non-Standard Interactions and CP Asymmetries

NSI could also impact CPV interpretation in long-baseline:

(M. Masud, A. Chatterjee, P. Mehta arXiv:1510.08261) 15 / 41

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SLIDE 16

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Results from Current νµ → νe Long-Baseline Experiments and Near Future

16 / 41

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SLIDE 17

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

νµ → νe Event Rates - Various Experiments.

arXiv:1307.7335, for 50 kton.years∗ of exposure. No detector effects Super Beams Experiment Baseline νµ → νµ νµ → ντ νµ → νe δCP range T2K 295km (off-axis) 30 GeV, 750 kW 9 × 1020 POT/year 900 < 1 40 - 70 MINOS LE 735km 120 GeV, 700 kW 6 × 1020 POT/year 11,000 115 230-340 NOνA 810km (off-axis) 120 GeV, 700 kW 6 × 1020 POT/year 1500 10 120 - 200 LBNF LE† 1,300km 80 GeV, 1.1MW 1.5 × 1021 POT/year 4300 160 350 - 600 LBNF ME† 1,300km 120 GeV, 1.2MW 1.1 × 1021 POT/year 12,000 690 290 - 430

∗ Facility duty factor taken into consideration † 2012 LBNE CDR Reference Design with NuMI style focusing

Even with maximal CP, event rate is a ≤ 10 νµ → νe per kT.MW.yr Experimental challenge for CPV measurements: STATISTICS!

17 / 41

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SLIDE 18

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

First νµ → νe results from T2K and NOνA

T2K 6.57 × 1020 POT in ν mode: 28 νe candidates (4.9 ± 0.6 bkgd) 4.04 × 1020 POT in ¯ ν mode: 3 ¯ νe candidates (1.51 to 1.77 bkgd). NOνA 2.74 × 1020 POT in ν mode: 6 LID candidates (3.3 σ signal of νe appearance) 11 LEM candidates (5.5 σ signal of νe appearance) No ¯ ν running yet! The current results favor maximal CP at NH

18 / 41

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SLIDE 19

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

T2K+NOνA Prospects

T2K (7.8 × 1021 POT ) and NOνA (1.8 × 1021 POT) combined, exclusion of δcp = 0 at 90% C.L. (K. Abe et. al.PTEP 2015 (2015) no.4, 043C01;

arXiv:1409.7469):

Normal Hierarchy

19 / 41

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SLIDE 20

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

T2K+NOνA Prospects

T2K (7.8 × 1021 POT ) and NOνA (1.8 × 1021 POT) combined, exclusion of δcp = 0 at 90% C.L. (K. Abe et. al.PTEP 2015 (2015) no.4, 043C01;

arXiv:1409.7469):

Inverted Hierarchy

20 / 41

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SLIDE 21

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Long Baseline ν Facility (LBNF) and Deep Underground ν Experiment (DUNE)

GOAL: Precision measurements of the parameters that govern νµ → νx and νµ → νx to determine δCP, sign of ∆m2

31, octant of θ23.

Long baseline experiment with a tunable wide-band beam and a 1300km baseline from Fermilab to the Sanford Underground Research Facility in Lead, SD.

Baseline (km) 500 1000 1500 2000 2500 3000 Required Exposure (kt-MW-yr) 500 1000 1500 2000 2500 3000

Coverage

CP

δ CPV with 75% σ Exposure to reach 3 NH (IH considered)

  • M. Bass et. al. Phys.Rev. D91 (2015) 052015

Highly capable multi-purpose Near Detector at Fermilab 40 kton fiducial Liquid Argon TPC Far Detector (80 kton total). Both single and dual-phase LArTPC options under consideration.

21 / 41

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SLIDE 22

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The DUNE Collaboration

Formed in Jan 2015 from combination of the US-based LBNE and LBNO experiments.

22 / 41

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SLIDE 23

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Fermilab Accelerator upgrades for DUNE

Planned upgrades to the Fermilab complex to increase proton intensity: PIP-II replaces upstream portion of linac feeding into 8 GeV Booster: 1.03 MW at 60 GeV 1.07 MW at 80 GeV 1.20 MW at 120 GeV Ready by 2025 Further upgrades (PIP-III) would replace booster with Rapid Cycling Synchrotron (RCS) or SC Linac. Currently in R&D stage. ≥ 2.0 MW at 60 GeV ≥ 2.3 MW at 120 GeV

23 / 41

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SLIDE 24

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The LBNF Beamline for DUNE

Advanced conceptual design tunable wide-band NuMI-style focusing:

(GeV)

ν

E 2 4 6 8 10 12 14 16 18 20 CC events/GeV/10kt/MW.yr

µ

ν 100 200 300 400 500 600 700 800 Low Energy Tune Medium Energy Tune High Energy Tune LBNF Beam Tunes

Optimized focusing design using genetic algorithim with 3 horns ∼ 30% more flux for CPV

24 / 41

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SLIDE 25

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The DUNE Near Detector Reference Design

Reference design is the Fine Grained Tracker based on the “LBNE- India Detailed Project Report (DPR)” submitted to DAE, India in

  • 2012. Alternative/additional designs under consideration by DUNE

Magnet ¡ Coils ¡ Forward ¡ ECAL ¡ End ¡ RPCs ¡ Backward ¡ECAL ¡ Barrel ¡ ECAL ¡ STT ¡Module ¡ Barrel ¡ ¡ RPCs ¡ End ¡ RPCs ¡

25 / 41

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SLIDE 26

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Measuring the ν Flux with the DUNE ND

26 / 41

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SLIDE 27

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Near to Far Extrapolation

Extrapolation from ND (574m) to FD (1297km) is not trivial!

27 / 41

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SLIDE 28

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The DUNE Far Detector LArTPC

Liquid Argon TPCs: Single Phase

28 / 41

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SLIDE 29

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The DUNE Far Detector LArTPC

Liquid Argon TPCs: Dual Phase

29 / 41

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LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

The DUNE Far Detector LArTPC

30 / 41

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SLIDE 31

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Simulation/Reconstruction in a Single Phase LArTPC (http://www.phy.bnl.gov/wire-cell)

νµ CC νe CC νµ NC

31 / 41

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LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

DUNE Event Spectra Exposure: 150 kT.MW.yr (equal ν/¯

ν) 1MW.yr = 1 × 1021 p.o.t at 120 GeV. (sin2 2θ13 = 0.085, sin2 θ23 = 0.45, δm2

31 = 2.46 × 10−3 eV2)

930 νe, 5 ¯ νe, 204 νbeam

e

, 17 NC, 19 ντ , 3 νµ 154 ¯ νe,32 νe, 98 νbeam

e

, 7 NC, 8 ντ , 1 νµ 8329 νµ, 192 ¯ νµ, 72 NC, 29 ντ 2420 ¯ νµ, 791 νµ, 33 NC, 13 ντ

Simultaneous fit to all four samples to determine osc. params

32 / 41

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LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

DUNE Event Spectra Exposure: 150 kT.MW.yr (equal ν/¯

ν) 1MW.yr = 1 × 1021 p.o.t at 120 GeV. (sin2 2θ13 = 0.085, sin2 θ23 = 0.45, δm2

31 = 2.46 × 10−3 eV2)

1171 νe,3 ¯ νe, 204 νbeam

e

, 17 NC, 19 ντ , 3 νµ 94 ¯ νe,39 νe, 98 νBeam

e

, 7 NC, 8 ντ , 1 νµ 8329 νµ, 192 ¯ νµ, 72 NC, 29 ντ 2420 ¯ νµ, 791 νµ, 33 NC, 13 ντ

Simultaneous fit to all four samples to determine osc. params

33 / 41

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LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

DUNE CP Sensitivity

34 / 41

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SLIDE 35

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

DUNE CP Sensitivity

With 550 kT.MW.yr ≥ 5σ sensitivity for 50% δcp With 850 kT.MW.yr ≥ 3σ sensitivity for 75% δcp

π /

CP

δ

  • 1 -0.8 -0.6 -0.4 -0.2

0.2 0.4 0.6 0.8 1

2

χ ∆ = σ 2 4 6 8 10 12 CP Violation Sensitivity π /

CP

δ

  • 1 -0.8 -0.6 -0.4 -0.2

0.2 0.4 0.6 0.8 1

2

χ ∆ = σ 2 4 6 8 10 12

DUNE CPV Sensitivity Normal Hierarchy = 0.085

13

θ 2

2

sin = 0.45

23

θ

2

sin

σ 3 σ 5

No Energy Scale Unc. 1% Energy Scale Unc. 2% Energy Scale Unc. 5% Energy Scale Unc.

CP Violation Sensitivity Exposure (kt-MW-years) 200 400 600 800 1000 1200 1400

2

χ ∆ = σ 1 2 3 4 5 6 7 8 9

50% CP Violation Sensitivity DUNE Sensitivity Normal Hierarchy = 0.085

13

θ 2

2

sin = 0.45

23

θ

2

sin

CDR Reference Design Optimized Design 1% ⊕ 5% 2% ⊕ 5% 3% ⊕ 5%

50% CP Violation Sensitivity

35 / 41

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SLIDE 36

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

DUNE Physics Milestones (NH)

Even if CP is maximally violated → several years to 5σ discovery

36 / 41

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SLIDE 37

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Sensitivity to BνSM Physics: Sterile

νµ Disappearance νe Appearance

(J. Berryman et. al. Phys.Rev. D92 (2015) no.7, 073012 ) 37 / 41

slide-38
SLIDE 38

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Sensitivity to BνSM Physics: Sterile

νµ Disappearance νe Appearance

(J. Berryman et. al. Phys.Rev. D92 (2015) no.7, 073012 ) 38 / 41

slide-39
SLIDE 39

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

LBNF/DUNE Schedule

39 / 41

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SLIDE 40

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

Summary and Conclusions

Neutrino CP violation is best determined by studying νµ → νe and ¯ νµ → ¯ νe oscillations over long-baselines. Long-baseline experiments need to separate CP asymmetries from asymmetries induced by the expected MSW effect as well as new physics effects such as sterile neutrinos and NSI (if they exist). The current generation of experiments after a decade of running could rule out δCP = 0 at 90% C.L. over a large fraction of δCP − θ23 space. Combined results from running NOνA and T2K at maximum power could produce evidence for CPV at 3σ if it is maximal by mid 2020’s. LBNF/DUNE can establish CPV at 5σ over a wide range of δcp LBNF/DUNE can reach the same precision on θ13 as reactor exper- iments ⇒ unitarity tests. Wide-band tunable beam can also access νµ → ντ AND possibly disentangle BνSM effects such as CPV from νs, or NSI (studies ongoing).

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SLIDE 41

LBNF/DUNE and the Hunt for Leptonic CP Violation Mary Bishai Brookhaven National Lab Introduction

CP in ν SM CPV and other New Physics

Current Experimental Landscape LBNF/DUNE Conclusion

THANK YOU

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