Neutrino:
Catch me if you can!
Branislav Nikolić
[email protected]
University of Novi Sad
Department of Physics
place your bets...
lane 1
lane 2
cast:
neutrino!
- spin 1/2
- smallest mass
- only 1 force (W, Z)
- very strange
particle...
photon
weak force – only left neutrinos and right antineutrinos
no left antineutrinos or right neutrinos! (???)
- spin vector parallel to momentum
vector (right particle) or antiparallel
(left particle)
left neutrinos and right antineutrinos
why the asymetry?!
(weak force)
- implies non-zero mass of neutrino...
...which we can’t measure.
Solar neutrino problem - neutrinos from the Sun:
detected only 1/3 of the predicted number
solved: neutrino oscillations (mixing)
mass states
flavor states
produce an electron neutrino and detect a muon neutrino
neutrino mixing (oscillations) – fundamental problem of
New QM
different for antineutrinos! (? CP violation...?)
why neutrinos?
nucleosynthesis
why oscillations?
– sensitive to neutrino oscillations!
no neutrinos – no supernovae II (past decade research)
> 95% of grav. energy
carried away by neutrinos only!
“neutrino driven wind” – the essence of explosion!
- neutrinos from the Early Universe
- if oscillations then when decoupled from radiation?
Cosmic Neutrino Background? Maybe one day... (deeper
into past than CMB – even before nucleosynthesis!)
GOAL
wait a nanosecond...a
superluminal neutrino???
wins by 60
nanoseconds!
- new energies for supernovae
- more adjusted explosion mechanisms for supernovae
- new energies for nucleosynthesis
- new models for nucleosynthesis
- no more STR, no more E=mc^2, no more GTR, no
more QFT....?????
- good bye to Lorentz invariance on macroscopic level?!?!
where is the beauty in that?!
- exploring both theoretical (fundamental) and experimental
concequences in either case (superluminal or not) are a way
to the holy grail in physics and prhaps in astrophysicscosmology.
conclusion:
if you want to talk about
the connection of micro
and makroscopic world,
you might want to consider
neutrinos.