Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 61: Search for New Particles III
T 61.8: Vortrag
Mittwoch, 17. März 2021, 17:45–18:00, Tk
Search for long-lived particles decays in the CMS muon system — •Jörg Schindler1, Lisa Benato1, Gregor Kasieczka1, Cristián Peña2, Christina Wang3, and Si Xie3 — 1Universität Hamburg, Germany — 2Fermilab, USA — 3Caltech, USA
Traditionally, searches for new physics at the LHC focused on already established objects, like photons, leptons, jets or missing energy. A different approach is to look for signatures in the detector which up until now were not considered. One example are long-lived particles, which can have a large lifetime leading to macroscopic flight distances ranging from a few micrometers up to several kilometers. Such particles are for example predicted by twin Higgs models, where a dark sector mirroring the Standard Model (SM) particles is introduced. The Higgs boson mixes with its dark partner, acting as a mediator between the SM and dark sector and therefore can decay into non-SM particles. These non-SM particles are the long-lived neutral scalars πν, which later decay back into SM particles - in this case assumed to be predominantly b quarks.
In this talk a search for long-lived particles decaying in the CMS muon system is presented. These signatures can be observed with close to no background, but require the development of new reconstruction and analysis tools.
The status of the current search for LLPs with decays in the muon system is shown, using data collected by the CMS detector in run 2.