Heidelberg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 89: Higgs Boson: Decay in Fermions 2

T 89.2: Vortrag

Donnerstag, 24. März 2022, 16:30–16:45, T-H20

Search for Higgs boson decay to a pair of charm quarks in a two-jets topology at CMS with full Run-2 data. — •Andrey Pozdnyakov¹, Bjorn Burkle², Xavier Coubez^1,2, Alena Dodonova¹, Luca Mastrolorenzo¹, Spandan Mondal¹, Andrzej Novak¹, and Alexander Schmidt¹ — ¹RWTH University, Germany — ²Brown University, USA

Full Run-2 data of the CMS experiment has been analyzed in order to obtain the most sensitive result to date on the measurement of the Higgs boson coupling to charm quarks. The coupling of the Higgs boson to charm is probed in a direct search for the H → cc decay, when the Higgs boson is produced in association with a W or Z boson. The full analysis is carried out in two topologies : boosted, where the two jets from a Higgs boson candidate are merged into one large-cone jet, and resolved, where two small-radius jets are reconstructed. In this talk we present a detailed overview of the resolved part of the full analysis. Major developments are introduced compared to the previously published CMS result, based on a partial data set. Those include an improved jet flavor tagging for charm jets based on DNNs, a dedicated jet-energy regression, a "kinematic fit" that constrains momenta of the jets using leptons from an associated Z boson decay. All these improvements lead to a stringent constraint on |κ_c|, which pose a limit for BSM models with large κ_c variations.