HEP Student Seminars

# Testing the Littlest Higgs Model against LHC 13 Results with CheckMATE

## by Daniel Dercks (University of Hamburg)

Monday, November 5, 2018 from to (Europe/Berlin)
at DESY Hamburg ( Seminar Room 03 )
 Description Little Higgs Models provide an interesting alternative, non-supersymmetric solution to the hierarchy problem. In the special case of Littlest Higgs Models with T-Parity (LHT), the expected LHC topologies very much mimic those expected from supersymmetric extensions of the Standard Model, e.g. the MSSM. As many LHC searches for BSM particles are specifically designed for such final states, "recasting" SUSY results on the Littlest Higgs model provides important constraints on the viable parameter space of the model. In my talk, I will discuss the idea and the phenomenology of the LHT Model and focus on the similarities to the MSSM. I will then illustrate the procedure of "recasting" and how the collider phenomenology tool CheckMATE can be used to test this model against many possible LHC analyses, and discuss the results. Combining these with complementary results drawn from electroweak precision data, important absolute constraints on the key quantity of the LHT model (the symmetry breaking scale f) can be obtained. Material: Organised by Frued Braren, Joscha Knolle, Johannes Michel, Riccardo Nagar Support Email: johannes.michel@desy.de