Stop searches in flavourful supersymmetry

Crivellin, Andreas; Haisch, Ulrich; Tunstall, Lewis (2016). Stop searches in flavourful supersymmetry. Journal of High Energy Physics, 2016(9), 080. Springer 10.1007/JHEP09(2016)080

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Natural realisations of supersymmetry require light stops t ̃ , making them a prime target of LHC searches for physics beyond the Standard Model. Depending on the kinematic region, the main search channels are t ̃ → tχ ̃0, t ̃ → Wbχ ̃0 and t ̃ → cχ ̃0. We first examine the interplay of these decay modes with ̃c1 → cχ ̃01 in a model-independent fashion, revealing that a large parameter space region with stop mass values m ̃ up to 530GeV is excluded for any t ̃ → cχ ̃0 branching ratio by LHC Run I data. The impact of c ̃1 → cχ ̃01 decays is further illustrated for scenarios with stop-scharm mixing in the right-handed sector, where it has previously been observed that the stop mass limits can be significantly weakened for large mixing. Our analysis shows that once the ̃c1 → cχ ̃01 bounds are taken into account, non-zero stop-scharm mixing can lead to an increase in the allowed parameter space by at most 35%, with large areas excluded for arbitrary mixing.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Crivellin, Andreas and Tunstall, Lewis

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Sep 2016 08:10

Last Modified:

30 Sep 2016 08:10

Publisher DOI:

10.1007/JHEP09(2016)080

BORIS DOI:

10.7892/boris.88723

URI:

https://boris.unibe.ch/id/eprint/88723

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