1. Non-Baryonic Dark Matter: From the CMB and axial direct detection
Daniel Santos
Laboratoire de Physique Subatomique et de Cosmologie Grenoble
(CNRS/IN2P3-UJF-ENSPG)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

2. Angular Power Spectrum in Temperature WMAP (2006)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

3. LCDM model CMB + Lyman-alpha + clusters + supernovae Age : 13.7 Gyr
Composition :
Geometry : flat  inflation (?)
0.93 ± 0.03 ns
0.71 ± 0.04 h
0.27 ± 0.04 m
0.022 ± 0.001
bh2
0.73 ± 0.04 L
1.02 ± 0.02
tot
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

4. 2nd Sino-French Workshop on the Dark Universe
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

5. 2nd Sino-French Workshop on the Dark Universe
Galactic Halo existence justifies local measurements
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

6. Direct detection strategies
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

7. The lightest neutralino 2nd Sino-French Workshop on the Dark Universe
lowest mass linear superposition of superpartners
of the gauge and higgs bosons:
~ ~ ~ ~ ~
= a1B + a2W3 + a3H1 + a4H2
neutral, colorless, only weak interaction
stable with R-parity conservation
non-relativistic at decoupling  CDM
relic density can be compatible with cosmological
observations
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

8. 3He for axial detection of non-baryonic dark matter
spin 1/2 nucleus  axial interaction with
high signal/noise ratio : energy range ~ 1-5 keV
sensitive to M (WIMP) > 6 GeV
neutron capture signature: n + 3He  p + 3H keV
very low sensivity to -rays
no intrinsic X-rays
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

9. Direct Detection of SUSY particles
Elastic diffusion -quark :
spin dependent (axial)
SD(AX) α SD(p) × A2
spin independent (scalar)
SI(AX) α SI (p) × A4
For 3He and 19F : SD » SI
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

10. Cross section 3He- and event rate in MIMAC-He3 (10kg)
Accelerator constrains
Exclusion curve for
background 10-3 kg-1jour-1
Neutralino mass (GeV/c2)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

11. Complementarity with scalar detection
sSD and sSI
not correlated
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

12. 2nd Sino-French Workshop on the Dark Universe
Ionization ratio simulation (SRIM)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

13. R&D: MIMAC-He3: (MIcro-tpc MAtrix of Chambers of Helium 3)
LPSC (Grenoble) : D. Santos, F. Mayet, R. Brissot
Coordinateur technique : O. Guillaudin
- Electronique : O. Bourrion, G. Bosson, J-P. Richer
- Mécanique : Ch. Fourel, T. Cabanel
- Source d’ions : T. Lamy, J-C. Curdy, , P. Sole
ILL (Grenoble) : P. Van Esch, B. Guerard, G. Manzin
Dapnia-Saclay : P. Colas, I. Giomataris
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

14. MIMAC-He3: (MIcroTPC MAtrix of Chambers of He 3) spatial
High temporal resolution
energetic
recoil track projection
energy threshold < 1 keV
electron/recoil
discrimination
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

15. Range vs. Energy He3 recoils Electrons
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

16. a/b ratio = f (pressure) L~10 cm
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

17. Time collection = f(pressure)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

18. Diffusion of primary electrons
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

19. 2nd Sino-French Workshop on the Dark Universe
Source 3He, 4He, 1H
( LPSC-Grenoble)
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

20. MIMAC source spectrum at 14kV
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

21. 2nd Sino-French Workshop on the Dark Universe
Recoil energy distribution after a polypropilene foil of 0.44μg/cm2 for acceleration energies of 45 and 50 keV
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

22. 2nd Sino-French Workshop on the Dark Universe
Time of flight measurement of the ion coming out of the MIMAC source at 50 kV
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

23. 2nd Sino-French Workshop on the Dark Universe
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

24. Ionization measured in the range of a few keV (in 4He )
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

25. 2nd Sino-French Workshop on the Dark Universe
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos

26. 2nd Sino-French Workshop on the Dark Universe
Conclusions
The nBDM search is an open problem
The axial interaction should be explored
3He is a very interesting target
A matrix with different targets including 19F at high pressure (2 bar ) is a natural possible extension
The quenching factor measurement in 3He and 4He is inminent
The collaboration is open to people interested !
Beijing, August 28th 2006
2nd Sino-French Workshop on the Dark Universe
Daniel Santos