Dortmund 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 36: Search for Supersymmetry II
T 36.6: Vortrag
Dienstag, 16. März 2021, 17:15–17:30, Tk
Search for Higgsinos in final states with a low-momentum, displaced track at the CMS experiment — Samuel Bein, Viktor Kutzner, Yuval Nissan, Peter Schleper, Alexandra Tews, and •Moritz Wolf — Universität Hamburg
Many supersymmetric extensions to the Standard Model predict the three lightest electroweakinos, χ20, χ1±, χ10, to be Higgsino-like with similar masses around the electroweak scale. The lightest chargino and the second-lightest neutralino can be pair-produced and decay to the lightest neutralino. To search for these particles, the best strategy depends on the differences between their masses. For Δ m ( χ20 , χ10) > O ( 1 GeV ) lepton pairs from the decay of the second-lightest neutralino leave an experimentally distinct signature, whereas Δ m ( χ1± , χ10 ) 0.3 GeV can lead to the chargino giving rise to a disappearing track. However, mass splittings in the range of Δ m ( χ1± , χ10 ) = 0.3 − 1.0 GeV are still unexplored by either of those methods.
This study describes how a mono-jet analysis can be made more sensitive to Higgsinos with mass splittings in the latter range by requiring a slightly displaced track with low momentum in the event corresponding to a pion originating from the chargino decay.