Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 46: Di-Higgs 1 (bbττ)

T 46.8: Talk

Tuesday, March 5, 2024, 17:45–18:00, Geb. 30.41: HS 1

Methods for the simulation of the Z+jets process at CMS — Alena Dodonova, Ming-Yan Lee, •Andrey Pozdnyakov, Uttiya Sarkar, Alexander Schmidt, and Valentyn Vaulin — III. Physikalisches Institut A, RWTH Aachen University

The Z+jets process is a major background for searches for the Higgs boson decay to charm or bottom quarks, in associated production with a Z boson (ZH). Its modeling and sufficient statistics of the simulated sample are important factors for a competitive physics analysis. Two methods of the event generation which allow to enhance the statistical power of the samples in a given phases space (called phase space biasing) are discussed in this presentation. The first method is to produce samples binned in a relevant variable at Matrix Element (ME). The other one is to bias the sample at high transverse momentum at ME level, effectively generating more events at higher momenta.

A comparison of the simulated samples produced with Madgraph (LO), amc@NLO and Powheg MiNNLO generators in the phase space relevant for the ZH analysis is also shown.

Keywords: CMS; VJets; Powheg; Madgraph; amcNLO