2015/04/29 by Junjie Cao, Liangliang Shang, Cao, Junjie +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1504.07869
18 pages, 2 figures
openalex publication_date 2015/04/29 · arxiv created 2015/05/06 · arxiv updated 2015/05/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently the ATLAS collaboration reported a 3σ excess in the leptonic-Z+jets+ETmiss channel. This may be interpreted in the Next-to-Minimal Supersymmetric Standard Model (NMSSM) by gluino pair production with the decay chain g → q q χ20 → q q Z χ10, where χ10 and χ20 denote the lightest and the next-to-lightest neutralinos with singlino and bino as their dominant components respectively. After exploring the relevant parameter space of the NMSSM by considering the constraints from the ATLAS searches for jets + ETmiss signals, we conclude that the NMSSM is able to explain the excess at 1 σ level with the number of the signal events reaching its measured central value in optimal cases, and the best explanation comes from a compressed spectrum such as m_g ≃ 650 \rm GeV, mχ20 ≃ 565 \rm GeV and mχ10 ≃ 465 \rm GeV. We also check the consistency of the ATLAS results with the null result of the CMS on-Z search. We find that under the CMS limits at 95% C.L., the event number of the ATLAS on-Z signal can still reach 11 in our scenario, which is about 1.2 σ away from the measured central value.