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