Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: BSM Higgs 4
T 101.2: Vortrag
Donnerstag, 7. März 2024, 16:15–16:30, Geb. 30.41: HS 3
Search for heavy Higgs bosons and Axion-Like Particles in the tt final state at CMS — •Jörn Bach1,2,3, Christian Schwanenberger1,2, Alexander Grohsjean2, Laurids Jeppe1, Samuel Baxter1, and Afiq Anuar4 — 1Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany — 2Universität Hamburg, Hamburg, Germany — 3HAW Hamburg, Hamburg, Germany — 4CERN, Geneva, Switzerland
The Standard Model of particle physics is very successful in predicting the processes we observe at modern colliders such as the Large Hadron Collider (LHC). It is however incomplete and remaining questions, such as the nature of dark matter, are motivating searches for new particles.
A CMS search for a heavy Higgs boson in the tt final state in 2016 data has observed a local excess of 3.5σ (1.9σ global) for a pseudoscalar with a mass of 400 GeV and a width of 4%. Motivated by this result, we present a search for a scalar and pseudoscalar heavy Higgs boson decaying to tt with the full Run 2 CMS dataset. We exploit spin correlation information and the invariant mass of the tt system. Additionally to the scalar and pseudoscalar heavy Higgs bosons, we interpret the search in terms of a more general pseudoscalar Axion-like particle (ALP) by also allowing for direct couplings to the gluon.