Next generation of neutrino and dark matter experiments

Kai Zuber TU Dresden, Atomki Debrecen

Fakultät Mathematik und Naturwissenschaften, Institut für Kern- und Teilchenphysik

13. 9. 2018, Atomki Debrecen

Neutrinos – The prototype for rare events (very low cross section)

SN 1987A Neutrinos in the Standard Model are massless particles

Universal neutrino spectrum

SN 1987A

Neutrino mixing

Known in the quark - sector for more than 40 years (Fermi constant)

€

U =

cosθ12 sinθ12 0−sinθ12 cosθ12 00 0 1

⎛

⎝

⎜ ⎜ ⎜

⎞

⎠

⎟ ⎟ ⎟

cosθ13 0 sinθ13eiδ

0 1 0−sinθ13e

iδ 0 cosθ13

⎛

⎝

⎜ ⎜ ⎜

⎞

⎠

⎟ ⎟ ⎟

1 0 00 cosθ23 sinθ230 −sinθ23 cosθ23

⎛

⎝

⎜ ⎜ ⎜

⎞

⎠

⎟ ⎟ ⎟

€

ν i = Uαi να∑

⎟⎟⎠

⎞⎜⎜⎝

⎛

ΘΘ−

ΘΘ=

cossinsincos

U

2 Flavour Scenario

Neutrino Oscillations

€

Δm2 = m22 −m1

2

No absolute neutrino mass measurement!

But its observation proves a non-zero mass €

Δm2 ≈EL

Sensitivity

)27.1(sin2sin)( 222

ELmP ΔΘ=→ βα νν

Prob

abili

ty

Distance source - detector

2 unknown Parameters: sin22θ, Δm2

with

Simple 2 flavour scenario Probability

Kai Zuber

Status 2018

Kai Zuber

Neutrino mass schemes

normal inverted

• almost degenerate neutrinos m1≈ m2≈ m3

• hierarchical neutrino mass schemes

- We do not know which scheme is realised in nature

- We don‘t know absolut scale

Kai Zuber

Borexino

Kai Zuber

JUNO –Experiment (China)

Additionally: Jinping experiment (10x FV of Borexino)

Kai Zuber

Announcement yesterday: Hyper-Kamiokande Experiment to Begin Construction in April 2020

Japan

Kai Zuber

Hyper-Kamiokande

Kai Zuber

Neutrino Telescopes

Kai Zuber

Icecube Gen2

Future: DUNE (USA)

Future: DUNE

Future: DUNE

Dark matter

Detection:

Recoil of nucleus

Free parameters:

mDM and cross section

Dark matter

A huge number of experiments

Dark matter

Example: DARWIN experiment: 50 tons LXe

Similar approach also for LAr

+ cryobolometers

+ Scintillators

+ Semiconductors

+ Superheated droplets

+ ...

Summary

-  Neutrino physics made big progess in recent years

-  New large scale experiments are under construction or planned

-  Large scale dark matter experiments are planned too

-  Participation in all of these experiments is possible