Neutrino LBL Experiments and Guidance from Theorynuhorizons/nuhri7/talks/MaryBishai.pdf · Other...

Neutrino LBLExperimentsand Guidancefrom Theory

Mary BishaiBrookhavenNational Lab

Constraining3-Flavor νSM

CPV and δcpUnitarity tests

PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM

What to dowith ND’s

Conclusion

Neutrino LBL Experiments and Guidancefrom Theory

Nu Horizons VII, 21-23 Feb 2018, Harish-ChandraResearch Institute, Allahbad, India

Mary BishaiBrookhaven National Lab

February 20, 2018

1 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Outline

1 Constraining 3-Flavor νSMCPV and δcp

Unitarity tests

2 Physics Beyond ν SMLBL and SterileNSIOther νBSM

3 Future LBL and νBSM

4 What to do with ND’s

5 Conclusion

2 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Overview of Accelerator Long-Baseline Experiments

For 50 kton.years∗ of exposure. No detector effectsExperiment Baseline νµ → νµ νµ → ντ νµ → νe

δCP rangeCurrent Experiments

T2K 295km (off-axis)30 GeV, 750 kW

9× 1020 POT/year 900 < 1 40 - 70MINOS LE 735km120 GeV, 700 kW

6× 1020 POT/year 11,000 115 230-340NOνA 810km (off-axis)120 GeV, 700 kW

6× 1020 POT/year 1500 10 120 - 200

Future Experiments

LBNF/DUNE LE† 1,300km80 GeV, 1.1MW

1.5× 1021 POT/year 4300 160 350 - 600

LBNF/DUNE ME† 1,300km120 GeV, 1.2MW

1.1× 1021 POT/year 12,000 690 290 - 430T2HK (see T2K numbers)30 GeV, 1.3 MW∗ Facility duty factor taken into consideration† 2012 LBNE CDR Reference Design with NuMI style focusing

Even with maximal CP, event rate is ≤ 10 νµ → νe per kT.MW.yr3 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Latest from NOνA and T2K

T2K

2.2× 1021 P.O.TNOνA

4 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Latest Results on δcp (Global Fits)

P. F. de Salas et. al. arXiv 1708.01186 (Aug 2017):— 99% CL — 90% CL

The current results favor maximal CP at NH5 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

T2K+NOνA CPV 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

6 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

T2K+NOνA CPV 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

7 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

T2K II

Y, Fujii, NBI2017Maxmimal CPV > 3σ within our sights!

How does this change the physics goals from next gen. LBL ?

8 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Tokai to HyperKamiokande (T2HK)

Hyper-Kamiokande water Cherenkovdetector: 60m tall X 74m diameter186 kton fiducial (10x SuperK)40,000 HQE 20” PMTs295 km baseline

1.3 MW from JPARC starting 2024

Budget request submitted to startconstructionin FY2018. Data takingstarts 2026 same timeline as DUNE

Optional 2nd detector in Kamioka ORKorea at ∼ 1000 km baseline.

Signal candidate events: 186 kton, 1.3MW x 10 years, ν : ν̄ = 1 : 3

If CPV maximal will reach well over 5σ sensitivity9 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Long Baseline ν Facility (LBNF) and DeepUnderground ν Experiment (DUNE)

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

31, octant of θ23.

Long baseline experiment with atunable wide-band beam and a1300km baseline from Fermilab tothe Sanford Underground ResearchFacility in Lead, SD.

Baseline (km)500 1000 1500 2000 2500 3000

Req

uir

ed E

xpo

sure

(kt

-MW

-yr)

0

500

1000

1500

2000

2500

3000

CoverageCPδ CPV with 75% σExposure 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.

10 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

DUNE Event Spectra Exposure: 150 kT.MW.yr (equal ν/ν̄) 1MW.yr = 1× 1021

p.o.t at 120 GeV. (sin2 2θ13 = 0.085, sin2 θ23 = 0.45, δm231 = 2.46× 10−3 eV2)

930 νe, 5 ν̄e, 204 νbeame , 17 NC, 19 ντ , 3 νµ 154 ν̄e,32 νe, 98 νbeam

e , 7 NC, 8 ντ , 1 νµ

8329 νµ, 192 ν̄µ, 72 NC, 29 ντ 2420 ν̄µ, 791 νµ, 33 NC, 13 ντ

Simultaneous fit to all four samples. Richness of spectral informationin both νµ and ν̄µ ⇒ explicit demonstraction of CPV

11 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

DUNE Event Spectra Exposure: 150 kT.MW.yr (equal ν/ν̄) 1MW.yr = 1× 1021

p.o.t at 120 GeV. (sin2 2θ13 = 0.085, sin2 θ23 = 0.45, δm231 = 2.46× 10−3 eV2)

1171 νe,3 ν̄e, 204 νbeame , 17 NC, 19 ντ , 3 νµ 94 ν̄e,39 νe, 98 νBeam

e , 7 NC, 8 ντ , 1 νµ

8329 νµ, 192 ν̄µ, 72 NC, 29 ντ 2420 ν̄µ, 791 νµ, 33 NC, 13 ντ

Simultaneous fit to all four samples. Richness of spectral informationin both νµ and ν̄µ ⇒ explicit demonstraction of CPV

12 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


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

δ1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8 1

2χ

∆ =

σ

0

2

4

6

8

10

12

CP Violation Sensitivity

π/CP

δ1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8 1

2χ

∆ =

σ

0

2

4

6

8

10

12DUNE CPV Sensitivity

Normal Hierarchy

= 0.08513

θ22

sin

= 0.4523θ2

sin

σ3

σ5

No Energy Scale Unc.

1% Energy Scale Unc.



CP Violation Sensitivity

Exposure (ktMWyears)0 200 400 600 800 1000 1200 1400

2χ

∆ =

σ

0

1

2

3

4

5

6

7

8

9

50% CP Violation Sensitivity

DUNE Sensitivity

Normal Hierarchy

= 0.08513

θ22

sin

= 0.4523θ2

sin

CDR Reference Design

Optimized Design

1%⊕5%

2%⊕5%

3%⊕5%

50% CP Violation Sensitivity

13 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

DUNE Physics νSM Milestones (NH)

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

14 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

How well do we need to know δcp?

T2HK

For maximal CPV - how well should we know σ(δcp)? ν/ν̄ separately ?

15 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

How well do we need to know θ23?


Reso

luti

on

23

θ2sin

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

Resolution23θ2sin

DUNE Sensitivity

Normal Hierarchy

= 0.08513θ22sin

= 0.4523

θ2sin

Resolution23θ2sin

HyperK Octant (Atmospheric) DUNE θ23 resolution (beam)

We need to resolve the θ23 octant - but what about the resolution?

16 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Unitarity tests (?): θ13 Measurements


Res

olut

ion

13θ22

sin

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

0.016

0.018

0.02

Resolution13θ22sin

DUNE Sensitivity

Normal Hierarchy

= 0.08513θ22sin

= 0.4523

θ2sin

Resolution13θ22sin

DUNE can eventually reach same σ(θ13) as reactors

Is this useful? How far should we push on this?

17 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Unitarity tests (?) : νµ → ντ

Recent results from SuperKamiokande (arXiv:1711.09436):

ντ appearance experimentally v. challenging

HyperK atmospheric data will add a lot more statistics

18 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

The LBNF Beamline for DUNE

Initial conceptual design was of a tunable wide-band NuMI-stylefocusing:

(GeV)νE 0 2 4 6 8 10 12 14 16 18 20

CC

ev

en

ts/G

eV

/10

kt/

MW

.yr

µ ν

0

100

200

300

400

500

600

700

800

Low Energy Tune

Medium Energy Tune

High Energy Tune

LBNF Beam Tunes

LBNF has switched to CPV optimized focusing design with 3 horns !

19 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

ντ Appearance in DUNE

Use LBNF CD1R reference design, NuMI-like focusing with 2 horns,230kA and change tune by varying target and horn distances, horncurrents and sizes. No detector effects included!

2015 two horn optimized design Ep = 66 GeV:

GeVνE 0 2 4 6 8 10 12 140

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1 (Events/GeV/kt/1e20 pot.)σ × P × Φ

p.o.t)10

/2x102/GeV/m ν) (µν(ΦUnoscillated

) x 10e ν → µ νP(

/GeV) 2 cm -38

/E (10 σ CC e ν

)2 cm -38

(10 σ × P

Appearance at 1300 kme ν → µ ν

GeVνE 0 5 10 15 20 25 300

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1 (CC Events/GeV/kt/1e20 pot.)σ × P × Φ

(QE Events/GeV/kt/1e20 pot.)σ × P × Φ

p.o.t)10


) τ ν → µ νP(

/GeV) 2 cm -38

/E (10 σ CC τ ν

)2 cm -38

(10 σ ×P

Appearance at 1300 kmτ ν → µ ν

νµ → νe 292 events νµ → ντ 60 eventsin 40 ktons, 1 year at 1.2 MW

Increase ντ appearance 10x!!!

Increase high energy νe appearance - good for BSM searches20 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

ντ Appearance in DUNE

Use LBNF CD1R reference design, NuMI-like focusing with 2 horns,230kA and change tune by varying target and horn distances, horncurrents and sizes. No detector effects included!

LBNF target -2m from horn 1, NuMI focusing 230 kA, horns 17m apart

GeVνE 0 2 4 6 8 10 12 140

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1 (Events/GeV/kt/1e20 pot.)σ × P × Φ

p.o.t)10


) x 10e ν → µ νP(

/GeV) 2 cm -38

/E (10 σ CC e ν

)2 cm -38

(10 σ × P

Appearance at 1300 kme ν → µ ν

GeVνE 0 5 10 15 20 25 300

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1 (CC Events/GeV/kt/1e20 pot.)σ × P × Φ

(QE Events/GeV/kt/1e20 pot.)σ × P × Φ

p.o.t)10


) τ ν → µ νP(

/GeV) 2 cm -38

/E (10 σ CC τ ν

)2 cm -38

(10 σ ×P

Appearance at 1300 kmτ ν → µ ν

νµ → νe 330 events νµ → ντ 700 eventsin 40 ktons, 1 year at 1.2 MW

Increase ντ appearance 10x!!!

Increase high energy νe appearance - good for BSM searches21 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Challenges for ντ Appearance

Experimental constraints:

We dont have a 100kton OPERA detector!.

HyperK will significantly increase the statistical significance ofthe atmospheric appearance but almost no L/E resolution.

DUNE has better E resolution for beam ντ appearance. Howgood? How to handle huge νµ,e CC and NC backgrounds?

DUNE tunable beam is NO LONGER reference design. Needstrong theory and experimental input to convince beam projectto enable deployment of a HE option ASAP!!!!.

Theory challenges

What is the expected ντ cross-section? New data on νµcross-sections is/is not included in “latest” predictions of ντ?

Xsec predictions on different targets (H2O and Ar)

We need better understanding of the nuclear models andintranuclear effects both for νµ and ντ

Theoretical uncertainties on ντ xsecs ?

22 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Physics Beyond ν SM in Long-Baseline Oscillations

Due to the very small masses and large mixing of neutrinos, theiroscillations over a long distance act as an exquisitely precise interfer-ometer with high sensitivity to very small perturbations (W. Marciano,BNL) caused by new physics phenomena, such as:

sterile neutrino states that mix with the three known activeneutrino states

nonstandard interactions in matter that manifest inlong-baseline oscillations as deviations from the three-flavormixing model

new long-distance potentials arising from discrete symmetriesthat manifest as small perturbations on neutrino andantineutrino oscillations over a long baseline

large compactified extra dimensions from String Theorymodels that manifest through mixing between theKaluza-Klein states and the three active neutrino states

We need more guidance from theory

23 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Impact of Sterile Neutrinos on Long-Baseline νOscillations

L/E (km/GeV)-210 -110 1 10 210 310 410

Pro

babi

lity

0

0.2

0.4

0.6

0.8

1

1.2

2 = 0.05 eV412m∆

)µν→µνStd. Osc. P( 5)×)(eν→µνP(

)µν→µνP()τν→µνP(

)sν→µν1-P(

ND FD

Neutrino Energy (GeV)-110110210


A. Sousa, U. Cinncinati

24 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion


L/E (km/GeV)-210 -110 1 10 210 310 410

Pro

babi

lity

0

0.2

0.4

0.6

0.8

1

1.2

2 = 0.50 eV412m∆

)µν→µνStd. Osc. P( 5)×)(eν→µνP(


)sν→µν1-P(

ND FD




25 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion


L/E (km/GeV)-210 -110 1 10 210 310 410

Pro

babi

lity

0

0.2

0.4

0.6

0.8

1

1.2

2 = 5.0000 eV412m∆

)µν→µνStd. Osc. P( 5)×)(eν→µνStd. Osc. P(


)sν→µν1-P(

ND FD




26 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

CP Asymmetry 3-flavor and with a Sterile Neutrino∆m2

41 ∼ 1 eV2

The integrated CP asymmetry at the DUNE/LBNF baseline of1300km :

(D. Dutta et. al. JHEP 1511 (2015) 039; arXiv:1508.06275)

Observation of a CP asymmetry is not sufficient to determine its origin.27 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Latest Results on Sterile Searches

Daya Bay fuel evolution result:

There is NO Reactor Anomaly. Theory must move on.

28 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Latest Results on Sterile Searches

Latest from MINOS/MINOS+:

νµ disappearance is experimentally “clean”

Exclusion of νe appearance hints is a strong constraint.

29 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Non-Standard Interactions

30 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Non-Standard Interactions

NSI could also impact CPV interpretation in long-baseline:

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

31 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Beyond νSM: Large Extra Dimensions

Phys.Rev. D84 (2011) 013003:

Requires wide-band, detailed spectral information at higher energies

32 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Beyond νSM: Long Range Interactions

Phys.Rev. D84 (2011) 013009Modifies P(νµ → νµ)Example at 1300km baseline with α′ = 1.0, 0.5, 0.1× 10−52

corresponding to thick solid, dashed, and dotted curves, respectively:

Requires long baselines and detailed spectral information

33 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Recent Results on ν BSM Searches in LBL Expts

“New Constraints on Sterile Neutrinos with MINOS/MINOS+ andDaya Bay” e-Print: arXiv:1705.05064

“Search for active-sterile neutrino mixing using neutral-currentinteractions in NOvA” NOvA Collaboration (P. Adamson (Fermilab)et al.) Phys.Rev. D96 (2017)

“Search for flavor-changing nonstandard neutrino interactions using νe

appearance in MINOS” MINOS Collaboration (P. Adamson(Fermilab) et al.). Phys.Rev. D95 (2017)

“Constraints on Large Extra Dimensions from the MINOSExperiment“ MINOS Collaboration (P. Adamson (Fermilab) et al.).Phys.Rev. D94 (2016)

No sign of the “usual” stuff Need “unusual” ideas from theorists

34 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

LBNF/DUNE High Energy Beams and NSI P. Mehta, M.

Masud, M. Bishai

Study NSI sensitivity with GLoBeS using νµ → νµ,e and 3 sampleLBNF-like beam tunes : LE, ME and HE∗.NSI parameters used:|εeµ| = 0.04, |εeτ | = 0.04, εee = 0.4, φeµ=0, φeτ

NSI effects in νµ → νe are larger at higher energy∗

2 NuMI horns, 230kA, 6.6m apart and horns were not moved for higher energy beam tunes

(non-optimal beams). Decay pipe was assumed to be 250m.

35 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

SI/NSI Separation with Different Beams

M. Masud, P. Mehta, M. Bishai arXiv:1704.08650

SI/NSI separation metric:

36 / 45

https://arxiv.org/abs/1704.08650





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

SI/NSI Separation with Different Beams

M. Masud, P. Mehta, M. Bishai arXiv:1704.08650

Fraction of SI δcp for which SI/NSI can be separated at the 3/5σlevel:

Can achieve 3σ separation for > 80% of true δcp

No beam optimization attempted yet!

37 / 45

https://arxiv.org/abs/1704.08650





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Sensitivity to BνSM Physics: Sterile

νµ Disappearance νe Appearance

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

Sensitive to lower mass ranges than SBN/MINOS+

Only tried CPV optimized beam. No HE tunes considered.

38 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Sensitivity to BνSM Physics: Sterile

νµ Disappearance νe Appearance

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

Sensitive to lower mass ranges than SBN/MINOS+

Only tried CPV optimized beam. No HE tunes considered.

39 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Example of DUNE/T2HK combinations andphysics tests

From Agarwalla et. al. (arXiv: 1711.02017), tests of differentneutrino mixing schemes with DUNE/T2HK:

What can DUNE/T2HK combinations tell us about the new physics40 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

The DUNE Near Detector CD1 Reference Design

CD1 Reference design was a Fine Grained Tracker. Several alterna-tive/additional designs currently under consideration by DUNE.

Magnet Coils

Forward ECAL

End RPCs

Backward ECAL Barrel ECAL

STT Module

Barrel RPCs

End RPCs

41 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

T2HK ND Concepts

B. Richards, EPS 2017

NuPRISM primarily for cross-section measurements

42 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

What do we do with ND’s

Next generation LBL experiments are ALSO next generationSBN experiments - but can they add anything new?

ND ν scattering physics vs e scattering physics at JLAB : NEEDHONEST ASSESSMENT of pros and cons

Searches for heavy neutrinos and dark matter from beam dumpin NDs - is there really a compelling case? Is phase spaceaccessible mostly ruled out by previous experiments?

43 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

Summary and Conclusions

The current generation of experiments after a decade of runningcould rule out δCP = 0 at 90% C.L. over a large fraction ofδCP − θ23 space. Combined results from running NOνA andT2K(II) at maximum power could produce evidence for CPV at3σ if it is maximal by mid 2020’s.

Future long-baseline experiments need to be able to separateany observed CP asymmetries from asymmetries induced by theexpected MSW effect as well as new physics effects such assterile neutrinos and NSI (if they exist).

DUNE and T2HK can establish νSM CPV at ≥ 5σ over a widerange of δcp

The LBNF/DUNE wide-band tunable beam can also access νµ →ντ and possibly disentangle BνSM effects from νs, or NSI.Combination of T2HK and DUNE could enable further disentanglingof ν BSM that is baseline dependant effects.Theoretical input is needed to expand physics program of LBL expts.BEYOND CPV searches.What do we do with NDs other than constrain flux?

44 / 45





PhysicsBeyond ν SM

LBL and Sterile

NSI

Other νBSM

Future LBLand νBSM


Conclusion

THANK YOU

45 / 45

Neutrino LBL Experiments and Guidance from Theorynuhorizons/nuhri7/talks/MaryBishai.pdf · Other...

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