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Consistency of the recent ATLAS Z+ETmiss excess in a simplified general gauge mediation model


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Type

Article

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Authors

Raklev, A 
Kvellestad, A 

Abstract

ATLAS recently reported a 3σ excess in a leptonic-Z+ETmiss channel. This was interpreted in the literature in a simplified General Gauge Mediation model containing a gluino, a higgsino next-to-lightest supersymmetric particle (NLSP) and a gravitino lightest supersymmetric particle (LSP). We test the consistency of this explanation in lieu of the results of the corresponding search in CMS, and other LHC searches for New Physics. Due to non-decoupling effects from squarks the parameter space of these models is split into two regions; in one region additional leptons via top quark production is expected, while the other region sees a large probability for zero-lepton events. After combining the relevant constraints we find that these models cannot explain the ATLAS excess.

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Keywords

hep-ph, hep-ph, hep-ex

Journal Title

Physical Review D - Particles, Fields, Gravitation and Cosmology

Conference Name

Journal ISSN

1550-7998
1550-2368

Volume Title

91

Publisher

American Physical Society (APS)
Sponsorship
Science and Technology Facilities Council (ST/J000434/1)
Science and Technology Facilities Council (ST/L000385/1)
This work has been partially supported by STFC Grant No. ST/L000385/1. We thank the Cambridge SUSY Working Group for stimulating discussions. The CPU intensive parts of this work were performed on the Abel Cluster, owned by the University of Oslo and the Norwegian metacenter for High Performance Computing (NOTUR), and operated by the Research Computing Services group at USIT, the University of Oslo IT-department. The computing time was given by NOTUR allocation NN9284K, financed through the Research Council of Norway.