The Inert Doublet Model A new archetype of wimp dark matter Michel Tytgat Université Libre de Bruxelles Brussels, Belgium TAUP2007, Sendai, Japan Based.

The Inert Doublet ModelThe Inert Doublet ModelA new archetype of wimp dark matter

Michel TytgatUniversité Libre de Bruxelles

Brussels, Belgium

TAUP2007, Sendai, Japan

Based on

L. Lopez Honorez, J. Oliver & E. Nezrihep-ph/0612275 JCAP 0702:028,2007

Thomas Hambye arXiv: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 ModelThe Minimal Inert Doublet Model

All SM fields are even (e.g. no H2/quark couplings)

• 2 symmetry

Stable Higgs (the shiggs)

• Standard Model with 2 Higgs doublets

• Vacuum

and

• The Inert Doublet Model

• What is it good for?

• Dark matters

• Results

• B

+ + H0

May push Mhiggs up to 600 GeV

0

Electroweak Symmetry Breaking I

W,Z W,Z

Electroweak Symmetry Breaking II

h

V(h)V1-loop(h)

h h

H2

Large effects from top quark Need large quartic couplings for Mh> 115 GeV

L f L H2 NR + h.c. NR - NRUnder 2

ν ν ν ν

NR NR

M ν =

λ5 f 2 v2

16 π2 MNR

~

Standard See Saw

MNR 4 π / λ5 MNR

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

Higgs interactions

co-annihilations large cross-section

Unitarity limit on the mass of H0 (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+ H0(A0)

p p Z* or γ* H0 A0

A0 H0 Z* dilepton + missing energy

H+ H0 (or A0) 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

DM interactions (from weak, to superweak, togravitational)

Between 10-6 eV and 1019 GeV

CP violation, non-equilibrium dynamics, B violationQCD dynamics

L f L H2 NR + h.c.

NR

H2

LNR

H2

L

and

CP violating, out-of-equilibrium decay may produce

NL – NLc = A ≠ 0 and NH2 – NH2c = - A Dark matterasymmetry