Kaluza-Klein Electroweak Dark matter Dong Woo Kang (SKKU) T. Flacke, DWK, K. C. Kong, G. M. Mohlabeng, S. C. Park arXiv:1503.xxxxx Exploring the Dark Sector.

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Presentation transcript:

Kaluza-Klein Electroweak Dark matter Dong Woo Kang (SKKU) T. Flacke, DWK, K. C. Kong, G. M. Mohlabeng, S. C. Park arXiv:1503.xxxxx Exploring the Dark Sector 20151

Outline UED review Model setup Phenomenology and precision test –Electroweak precision test –Dilepton resonance at the LHC –Relic abundance of electroweak KK DM Conclusions Exploring the Dark Sector 20152

Universal Extra Dimension model Exploring the Dark Sector KK-parity

Kaluza-Klein Parity Exploring the Dark Sector KK-parity

“Minimal” Universal Extra Dimension model Exploring the Dark Sector Tree level1-loop level [Cheng, Matchev, Schmaltz, (2002)]

General UED action Exploring the Dark Sector D Bulk UED action Gauge FermionHiggsYuakawa Boundary Localized Kinetic Terms KK-parity [Flacke, Kong, Park, (2013)]

Example1. Split UED Exploring the Dark Sector Gauge FermionHiggsYuakawa Bulk mass term 5D Bulk UED action Fermion Lagrangian Boundary terms Universal boundary parameter [Park, Shu, (2009)] [Chen, Nojiri, Park, Shu, Takeuchi (2009)] [Kong, Park, Rizzo(2010)]

Example1. Split UED Exploring the Dark Sector Mass splitting between KK quarks and KK leptons gives good fit for PAMELA cosmic ray measurement. [Chen, Nojiri, Park, Shu, Takeuchi (2009)] [Kong, Park, Rizzo(2010)]

Example2. non-minimal UED Exploring the Dark Sector Gauge FermionHiggsYuakawa KK-parity 5D Bulk UED action Boundary terms [Flacke, Menon, Phalen (2008)] [Flacke, Menon, Sulivan (2012)]

Our model set up UED bulk action + BLKT of electroweak gauge sector In our analysis, we neglect the BLKTs of Higgs for simplicity. But if we turn on the Higgs BLKTs, KK Higgs can become LKP in some parameter space. We set BLKT at the electroweak scale, not at the Cut-off scale. –In MUED, there is no BLKT but one-loop contribution plays a role as boundary localized term. Exploring the Dark Sector Gauge FermionHiggsYuakawa Boundary parameters

Mass spectrum KK level-1 Exploring the Dark Sector The lightest mass eigenstate Heavy mass eigenstate

KK mixing angle Exploring the Dark Sector st KK mixing angle2 nd KK mixing angle

Effective Couplings Exploring the Dark Sector

Phenomenology and precision test Electroweak precision test –Even numbered KK gauge boson affect the four Fermi interactions. Collider searches –2 nd KK gauge boson resonance searches. Relic density –Upper bound from DM relic abundance. Exploring the Dark Sector

EWPT 4 Fermi operators Exploring the Dark Sector

EWPT 4 Fermi operators Exploring the Dark Sector Overlap integral from couplings [Huang, Kong, Park (2012)] [PDG (2014)]

EWPT 4 Fermi operators Exploring the Dark Sector

Collider searches Exploring the Dark Sector

Collider searches Exploring the Dark Sector

Collider Searches Exploring the Dark Sector

Relic density Exploring the Dark Sector Annihilation channels

Relic density Exploring the Dark Sector

Relic density Exploring the Dark Sector

Conclusions Exploring the Dark Sector

Exploring the Dark Sector Thank you