Signs of tops from highly mixed stops

Backović, Mihailo (Center for Cosmology, Particle Physics and Phenomenology — CP3, Universite Catholique de Louvain, Louvain-la-neuve, Belgium) ; Mariotti, Alberto (Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, and International Solvay Institutes, Pleinlaan 2, B-1050, Brussels, Belgium) ; Spannowsky, Michael (Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham, DH1 3LE, UK)

23 June 2015

Abstract: Supersymmetric extensions of the Standard Model with highly mixed squark flavours beyond minimal flavour violation provide interesting scenarios of new physics, which have so far received limited attention. We propose a calculable realization of such scenarios in models of gauge mediation augmented with an extra interaction between the messengers and the up type squark. We compute the supersymmetric spectrum and analyze the flavour physics constraints on such models. In a simplified model approach, we show that scenarios with maximal squark flavour mixing result in interesting phenomenological signatures at the LHC. We show that the model can be probed up to masses of m ũ  ≲ 950 GeV in the single-top event topology at LHC14 with as little as 300 fb −1 . The most distinctive signature of highly mixed scenarios, the same sign positive charge di-top, can be also probed to comparable squark masses at high luminosity LHC14.

Published in: JHEP 1506 (2015) 122
Published by: Springer/SISSA
DOI: 10.1007/JHEP06(2015)122
arXiv: 1504.00927
License: CC-BY-4.0

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