Center for Particles and Fields/Theory Group Seminar,
02 December 2014
02 December 2014
Dr Nathaniel Craig, UC-Santa Barbara
New signs of naturalness at the LHC
abstract
The search for physics beyond the Standard Model at the LHC is largely oriented towards new particles associated with solutions to the electroweak hierarchy problem. While the precise character of these partner states may vary from model to model, they typically possess large QCD production rates favorable for detection at hadron colliders. Null results in searches for partner particles during Run 1 of the LHC have placed the idea of electroweak naturalness under increasing strain. In this talk I'll discuss a new class of symmetry solutions to the hierarchy problem in which partner states are entirely neutral under the Standard Model and largely unconstrained by LHC data. Rather than rendering electroweak naturalness untestable, they give rise to entirely new signs of naturalness at the LHC, including displaced decays and other exotic signatures.