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Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 9: Search for Supersymmetry

T 9.2: Vortrag

Montag, 21. März 2022, 16:30–16:45, T-H22

Search for Higgsinos in final states with a low-momentum, displaced track at the CMS experimentSamuel Bein, 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 at the LHC.

In this analysis, a slightly displaced track with low momentum, corresponding to a pion originating from the chargino decay, is used to gain sensitivity to this intermediate range of mass splittings.

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