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
