The quest for supersymmetric (SUSY) particles is among the main search channels currently pursued at the LHC. Particularly, electroweak (EW) particles with masses as low as a few hundred GeV are still viable. Recent searches for the “golden channel”, pp→χ~20χ~1±→χ~10Z(∗)χ~10W±(∗) show consistent excesses between ATLAS and CMS in the 2 lepton, 3-lepton and mono-jet searches, assuming and Δm:=mχ~20-mχ~10≈20GeV. This mass configuration arises naturally in SUSY scenarios with wino/bino Dark Matter (DM) or higgsino DM. In these scenarios the lightest supersymmetric particle (LSP), assumed to be the lightest neutralino, χ~10, as a DM candidate is in good agreement with the observed limits on the DM content of the universe, as well as with negative results from Direct Detection (DD) experiments. We analyze these two scenarios with respect to the observed excesses, taking into account all relevant experimental constraints. We show that in particular wino/bino DM with different signs of the SU(2) and U(1) soft SUSY-breaking parameters can describe well the experimental excesses, while being in agreement with all other constraints. © The Author(s) 2024.

We thank J. Montejo Berlingen for helpful discussions. I.S. acknowledges support from DST-INSPIRE, India, under grant no. IFA21-PH272. The work of S.H. has received financial support from the grant PID2019-110058GB-C21 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe", and in part by the grant IFT Centro de Excelencia Severo Ochoa CEX2020-001007-S funded by MCIN/AEI/10.13039/501100011033. S.H. also acknowledges support from Grant PID2022- 142545NB-C21 funded by MCIN/AEI/10.13039/501100011033/ FEDER, UE. We acknowledge the use of the IFT Hydra computation cluster for a part of our numerical analysis.

Peer reviewed