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T: Fachverband Teilchenphysik

T 78: Higgs: Extended models

T 78.6: Vortrag

Donnerstag, 2. April 2020, 17:45–18:00, H-HS XVI

Search for charged Higgs bosons of a Type I 2HDM in the final state with one lepton and multiple jets — •David Brunner, Isabell Melzer-Pellmann, and Dirk Krücker — Deutsches Elektronen-Synchrotron (DESY)

The search for the direct production of non Standard Model (SM) elementary particles is one of the portals to explain new physics using high energy collider experiments like the Large Hadron Collider (LHC).

This search focuses on a Type I 2-Higgs Doublet Model (2HDM). The heavier neutral CP-even Higgs boson (H) is defined as the SM Higgs boson. In this configuration the decay of the charged Higgs boson (H^±) to the lighter CP-even Higgs boson (h) and a W^± boson is enhanced, while the h decays predominantly into b quarks and τ leptons. The production mode of the charged Higgs boson in association with one h is studied, where both h bosons each decay into two b quarks and the W^± decays leptonically.

Two types of machine learning algorithms are used in the analysis. First, a mass-parameterized boosted decision tree (BDT) is trained to optimize the signal significance for each mass point of interest. Second, a deep neural network (DNN) is trained on the substructure of highly boosted jets originating from h bosons and top quarks to differentiate between signal and background jets.

The search will be based on proton-proton collision data recorded by the CMS experiment at the LHC in 2016-18 with a center of mass energy of √s = 13 TeV. The results are given as expected limit on the cross section times branching ratio of the H^± decay.