The Inert Doublet Model A new archetype of

The Inert Doublet Model A new archetype of wimp dark matter Michel Tytgat Université Libre de Bruxelles Brussels, Belgium TAUP 2007, Sendai, Japan Based on L. Lopez Honorez, J. Oliver & E. Nezri hep-ph/0612275 JCAP 0702: 028, 2007 Thomas Hambye ar. Xiv: 0707. 0633

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

The Minimal Inert Doublet Model • Standard Model with 2 Higgs doublets • 2 symmetry All SM fields are even (e. g. no H 2/quark couplings) • Vacuum and Stable Higgs (the shiggs)

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

Electroweak Symmetry Breaking I W, Z + + 0 May push Mhiggs up to 600 Ge. V H 0

Electroweak Symmetry Breaking II V 1 -loop (h) V(h) H 2 h h h Large effects from top quark Need large quartic couplings for Mh> 115 Ge. V

L f L H 2 NR + h. c. ν Under 2 ν - NR NR ν ν Mν = NR ~ λ 5 f 2 v 2 16 π2 MNR Standard See Saw NR MNR 4 π / λ 5 Radiative See Saw lower scale MNR

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

The Weakly Interacting Massive Particle (WIMP) paradigm

Electroweak interactions co-annihilations large cross-section Higgs interactions Unitarity limit on the mass of H 0 (Griest & Kamionkowski)

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

Systematic analysis & direction detection & galactic fluxes

Coannihilation effects

• LHC signatures p p W* H+ H 0(A 0) p p Z* or γ* H 0 A 0 H 0 Z* dilepton + missing energy H+ H 0 (or A 0) W*

Archetype or Perfect Example • Weakly interacting massive particle • Simple model (few parameters, physics transparent) • Potentially interesting signatures

• The Inert Doublet Model • What is it good for? • Dark matters • Results • B

There many dark matter candidates and even more baryogenesis scenarii yet They do not explain why Between 10 -6 e. V and 1019 Ge. V QCD dynamics DM interactions (from weak, to superweak, to gravitational) CP violation, non-equilibrium dynamics, B violation

L f L H 2 NR + h. c. L L NR NR and H 2 CP violating, out-of-equilibrium decay may produce NL – NLc = A ≠ 0 and NH 2 – NH 2 c = - A Dark matter asymmetry