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

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

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

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

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

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

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

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 + 764 keV very low sensivity to -rays no intrinsic X-rays Beijing, August 28th 2006 2nd Sino-French Workshop on the Dark Universe Daniel Santos

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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