AiAmin R i Akb i hRezaei Akbarieh IPM,...

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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)

Free Powerpoint Templates Page 1

Outline• Dark MatterEvidenceEvidence, …

O M d l• Our ModelDifferent phases, Direct, Indirect,…

• Signature at the colliders.

• Conclusion

Evidence For Dark MatterGalactic rotation curves

Gravitational lensing

Light element abundances

CMB anisotropies

Large scale structure

Etc…

What is the nature of Dark Matter?

Stable

Dark Matter

Neutral under color, electromagnetism

Relic densityy

Stable

Dark Matter

Spin Neutral under color, electromagnetism

Relic density

Portal

Production Mechanism

Stable

Dark MatterSM

Neutral under color, electromagnetism

Relic densityy

Free Powerpoint Templates Page 7Beyond the SM

SPIN of dark matter?

VDM: A model for Vector Dark Matter.

Y.Farzan and A.R.A , accepted for publication in JCAP

Minimal version of the Model

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.

Spontaneous symmetry breaking

The mass of the gauge boson

The new vector boson is a DARK MATTER candidate if

Goldstone boson

Different phases

Phase I

We assume that the mixings between the SM Higgs and the new scalars are small

scalars are small.

Phase II

Free Powerpoint Templates Page 23Another component of Dark Matter

Equivalence of phases II and III

Annihilation modes in the minimal model

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

Annihilation modes in the extended model

• In case thatIn case that

Interesting scenariog

Direct detection

Free Powerpoint Templates Page 32E. Aprile et al. [XENON100 Collaboration], arXiv:1207.5988 [astro-ph.CO].

signature at the high energy g g gycolliders

Another Discovery Channely

Conclusions

Back p SlidesBackup Slides

M. Ackermann et al. [Fermi-LAT Collaboration], Phys. Rev. Lett. 107 (2011) 241302[arXiv:1108.3546 [astro-ph.HE]].

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