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Vector Boson as a Dark Matter A i R i Akb ih Amin Rezaei Akbarieh IPM, 2012 (based on: Y.Farzan and A.R.A , accepted for publication in JCAP) Free Powerpoint Templates Page 1
Vector Boson as a Dark Matter
A i R i Akb i hAmin Rezaei Akbarieh
IPM, 2012
(based on: Y.Farzan and A.R.A , accepted for publication in JCAP)
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Outline• Dark MatterEvidenceEvidence, …
O M d l• Our ModelDifferent phases, Direct, Indirect,…
• Signature at the colliders.
• Conclusion
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Evidence For Dark MatterGalactic rotation curves
Gravitational lensing
Light element abundances
CMB anisotropies
Large scale structure
Etc…
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What is the nature of Dark Matter?
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Stable
Dark Matter
Neutral under color, electromagnetism
Relic densityy
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Stable
Dark Matter
Spin Neutral under color, electromagnetism
Spin
Relic density
Massy
Portal
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Production Mechanism
Stable
Dark MatterSM
Neutral under color, electromagnetism
Relic densityy
Free Powerpoint Templates Page 7Beyond the SM
SPIN of dark matter?
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SPIN of dark matter?
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VDM: A model for Vector Dark Matter.
Y.Farzan and A.R.A , accepted for publication in JCAP
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Minimal version of the Model
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Extended Model
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Extended Model
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Extended Model
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Extended Model
Symmetry of the modelSymmetry of the model
St bilit f P t ti lStability of Potential
Some conservative assumption
For simplicity we take all the couplings to be realFor simplicity, we take all the couplings to be real.
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Spontaneous symmetry breaking
The mass of the gauge boson
The new vector boson is a DARK MATTER candidate if
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Goldstone boson
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Where
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Different phases
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Phase I
We assume that the mixings between the SM Higgs and the new scalars are small
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scalars are small.
Phase II
Free Powerpoint Templates Page 23Another component of Dark Matter
Equivalence of phases II and III
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Annihilation modes in the minimal model
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Annihilation modes in the minimal model
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Annihilation modes in the minimal model
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Annihilation modes in the extended model
• In case that are all heavier than V, the model can be considered as a Higgs portal model within which
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Annihilation modes in the extended model
• In case thatIn case that
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Interesting scenariog
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Direct detection
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Free Powerpoint Templates Page 32E. Aprile et al. [XENON100 Collaboration], arXiv:1207.5988 [astro-ph.CO].
signature at the high energy g g gycolliders
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Another Discovery Channely
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Conclusions
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Back p SlidesBackup Slides
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M. Ackermann et al. [Fermi-LAT Collaboration], Phys. Rev. Lett. 107 (2011) 241302[arXiv:1108.3546 [astro-ph.HE]].
