Kaluza-Klein Electroweak Dark matter Dong Woo Kang (SKKU) T. Flacke, DWK, K. C. Kong, G. M. Mohlabeng, S. C. Park arXiv:1504.xxxxx Wonju Spring School 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 Wonju Spring School 20152
Universal Extra Dimension model Wonju Spring School KK-parity
Kaluza-Klein Parity Wonju Spring School KK-parity
“Minimal” Universal Extra Dimension model Wonju Spring School Tree level1-loop level [Cheng, Matchev, Schmaltz, (2002)]
General UED action Wonju Spring School D Bulk UED action Gauge FermionHiggsYuakawa Boundary Localized Kinetic Terms KK-parity [Flacke, Kong, Park, (2013)]
Example1. Split UED Wonju Spring School 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 Wonju Spring School 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 Wonju Spring School 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. Wonju Spring School Gauge FermionHiggsYuakawa Boundary parameters
Mass spectrum KK level-1 Wonju Spring School The lightest mass eigenstate Heavy mass eigenstate
KK mixing angle Wonju Spring School st KK mixing angle2 nd KK mixing angle
Effective Couplings Wonju Spring School
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. Wonju Spring School
EWPT 4 Fermi operators Wonju Spring School
EWPT 4 Fermi operators Wonju Spring School Overlap integral from couplings [Huang, Kong, Park (2012)] [PDG (2014)]
EWPT 4 Fermi operators Wonju Spring School
Collider searches Wonju Spring School
Collider searches Wonju Spring School
Collider searches Wonju Spring School
Relic density Wonju Spring School Annihilation channels
Relic density Wonju Spring School
Relic density Wonju Spring School
Conclusions Wonju Spring School
Wonju Spring School Thank you