the inert doublet model a new archetype of wimp dark matter michel tytgat université libre de...
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The Inert Doublet Model What is it good for? Dark matters Results BTRANSCRIPT
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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
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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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
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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+ + H0
May push Mhiggs up to 600 GeV
0
Electroweak Symmetry Breaking I
W,Z W,Z
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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
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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
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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The Weakly Interacting Massive Particle (WIMP) paradigm
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Electroweak interactions
Higgs interactions
co-annihilations large cross-section
Unitarity limit on the mass of H0 (Griest & Kamionkowski)
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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Systematic analysis & direction detection & galactic fluxes
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Coannihilation effects
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• 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*
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Archetype or Perfect Example
• Weakly interacting massive particle
• Simple model (few parameters, physics transparent)
• Potentially interesting signatures
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• The Inert Doublet Model
• What is it good for?
• Dark matters
• Results
• B
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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
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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