IPMU Colloquium

Speaker: Ipsita Saha (Kavli IPMU)
Title: Status of EWkinos in view of muon (g-2), WIMP and collider searches (Posdoc Colloquium)
Date (JST): Fri, Nov 06, 2020, 15:30 - 16:00
Place: Zoom
Related File: 2591.pdf
Abstract: The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for variety of experimental data. The lighest supersymmetric particle (LSP), which we take as the lightest neutralino can account for the observed Dark Matter (DM) content of the universe via coannihilation with the next-to-LSP (NLSP), while being in agreement with negative results from Direct Detection (DD) experiments. Owing to relatively small production cross-sections a comparably light EW sector of the MSSM is also in agreement with the unsuccessful searches at the LHC. Most importantly, the EW sector of the MSSM can account for the persistent 3 − 4 σ discrepancy between the experimental result for the anomalous magnetic moment of the muon, (g − 2)μ, and its Standard Model (SM) prediction. Under the assumption that the neutralino provides the full DM relic abundance I will show that reasonable parameter space for the mass ranges of neutralinos, charginos and scalar leptons are still in agreement with all experimental data, including relevant LHC searches . In fact, an upper limit of ∼ 600 GeV for the LSP and NLSP masses can be drawn. Furthermore, assuming that the new result of the Run 1 of the “MUON G-2” collaboration at Fermilab yields a precision comparable to the existing experimental result with the same central value, one can see the potential impact of the combination of the Run 1 data with the existing (g − 2)μ data on the allowed MSSM parameter space. I will show that in such case the upper limits on the LSP and NLSP masses are substantially reduced by roughly 100 GeV. This would yield improved upper limits on these masses of ∼ 500 GeV. In this way, a clear target could be set for future LHC EW searches, as well as for future high-energy e+e− colliders, such as the ILC or CLIC.
Remarks: IPMU Postdoc Colloquium Series 10
Registration necessary from here: https://ipmu.zoom.us/webinar/register/WN_SiQNqIjNSfCUiA0na9o58g