Possible explanation of excess events in the search for jets, missing transverse momentum and a Z boson in pp collisions

Abstract

We study to which extent SUSY extensions of the Standard Model can describe the excess of events of 3.0 standard deviations observed by ATLAS in the on-Z signal region, respecting constraints by CMS on similar signal channels as well as constraints from searches for jets and E^{miss}_T. GMSB-like scenarios are typically in conflict with these constraints, and do not reproduce well the shape of the E^{miss}_T distribution of the data. An alternative scenario with two massive neutralinos can improve fits to the total number of events as well as to the H_T and E^{miss}_T distributions. Such a scenario can be realised within the NMSSM.

14 pages, 4 figures, 1 Table, more details of constraints and fits are discussed, to appear in EPJC

References in corpus (3)

• PYTHIA 6.4 Physics and Manual
• Z-peaked excess from heavy gluon decays to vector-like quarks
• Consistency of the recent ATLAS $Z+E_T^{\mathrm{miss}}$ excess in a simplified GGM model

Cited by in corpus (9)

• Single top squark production as a probe of natural supersymmetry at the LHC
• ATLAS Z-peaked excess in MSSM with a light sbottom or stop
• The ATLAS Z + MET Excess in the MSSM
• ATLAS Z Excess in Minimal Supersymmetric Standard Model
• ATLAS on-Z Excess Through Vector-Like Quarks
• Models of 750 GeV quarkonium and the LHC excesses
• Mixed Stops and the ATLAS on-Z Excess
• ATLAS on-Z Excess via gluino-Higgsino-singlino decay chains in the NMSSM
• Testing ATLAS Z+MET Excess with LHC Run 2