WIMPS

1
What do we know about
WIMPS Neutrinos
?
G.G.Ross, Edinburgh, 9th February 2005
Neutrinos
They exist!
Massive
Mixing angles large
Limited room for sterile neutrino wait for
MiniBoone
2
What do we know about
WIMPS Neutrinos
?
?
WIMPS
3
What we dont know about
WIMPS Neutrinos
?
Neutrinos
Majorana or Dirac?
Hierarchical or nearly degenerate?
Inverted hierarchy or normal hierarchy?
Origin of small mass - seesaw?
(Non-Abelian) family symmetry?
4
What we dont know about
WIMPS Neutrinos
?
Does it exist?
MOND alternative
Dark Matter
- Only visible matter gives structure seen
- Gravitational lensing
- Density perturbations?
Milgrom, Beckenstein
5
What we dont know about
WIMPS Neutrinos
?
Does it exist?
Dark Matter
Where is it?
Basel group astro-ph/0212516,0312461
astro-ph/0403154
6
What we dont know about
WIMPS Neutrinos
?
Does it exist?
Dark Matter
(WIMPS)
Where is it?
What is it?
Sterile neutrinos?
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Cryptons,
Can we find it?
7
What we dont know about
WIMPS Neutrinos
?
Neutrinos
Majorana or Dirac?
Hierarchical or nearly degenerate?
Inverted hierarchy or normal hierarchy?
Origin of small mass - seesaw?
(Non-Abelian) family symmetry?
8
Dirac or Majorana?
9
still room
A degenerate spectrum is indicative of a
non-Abelian family symmetry
Barbieri, Hall, Kane, GGR Antush, King
10
Symmetries
Coherent picture of quark and lepton masses and
mixing?
Family?
Family?
11
DATA
?
Bi-Tri Maximal Mixing
Harrison Scott
Non Abelian Structure?
12
Barbieri, Hall, Kane, GGR De Madeiros, GGR
?
13
?
?
Neutrinos?
14
What we dont know about
WIMPS Neutrinos
?
Does it exist?
Dark Matter
(WIMPS)
Where is it?
What is it?
Sterile neutrinos?
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Cryptons,
Can we find it?
15
What is dark matter?
Standard Model Neutrinos?
-No SM interactions apart from mixing
Sterile neutrinos?
Axions?
With R-parity conservation LSP stable -nature of
LSP model dependent
SUSY candidates
gravitinos, axinos very weakly interacting,
massive
neutralinos, sneutrinos (lt)SM interactions
16
Neutralino mass matrix
LSP sensitive to parameters
CMSSM
17
CMSSM
Ellis, Olive, Santoso, Spanos
18
Ramage,GGR
19
For some compactifications LKP stable
KK state
For low scale of compactification LKP can make up
dark matter
Wimpzilla
20
Can we find WIMPS?
Sterile neutrinos?
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Cryptons,
21
Can we find WIMPS?
Sterile neutrinos?
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Cryptons,
Very low scattering cross sections
22
Can we find WIMPS?
Sterile neutrinos?
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Cryptons,
Neutralino interactions exhaustively studied
23
CMSSM Neutralino searches
Ellis, Olive, Santoso, Spanos
24
CDMS II excluded
Ellis, Olive, Santoso, Spanos
25
Kaluza Klein searches
not visible by current searches
Annihilation products
Look for galactic annihilation production of
Signals could be visible if galactic cusps
exist for LKP sharp cutoff on positron energy
26
SUMMARY
What we could know about
WIMPS Neutrinos
?
Neutrinos
Majorana or Dirac?
?
Hierarchical or nearly degenerate?
?
Inverted hierarchy or normal hierarchy?
?
Origin of small mass - seesaw?
?
(Non-Abelian) family symmetry?
?
?
Wimps
Sterile neutrinos?
Indirect detection
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Direct detection possible
Cryptons,
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Cannot align Yukawa and A terms
Vives, GGR
Similar structure for charged leptons
Neutrino mixing not related to large RH mixing
30
SUMMARY
What we could know about
WIMPS Neutrinos
?
Neutrinos
Majorana or Dirac?
?
Hierarchical or nearly degenerate?
?
Inverted hierarchy or normal hierarchy?
?
Origin of small mass - seesaw?
?
(Non-Abelian) family symmetry?
?
?
Wimps
Sterile neutrinos?
Indirect detection
Axions?
SUSY neutralinos, sneutrinos, gravitinos,
axinos
Little Higgs candidate?
KK state?
Wimpzilla?
Direct detection possible
Cryptons,
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CMSSM
SO(10)
Ramage, GGR