Associated Higgs Boson Production at NNLO QCD - INSPIRE

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Associated Higgs Boson Production at NNLO QCD

Imre Majer
(
- Zurich, ETH
)

2020

169 pages

Supervisor:

Aude Gehrmann–De Ridder

Thesis: PhD

Zurich, ETH,
Zurich, ETH

(2020)

Published: 2020

DOI:

10.3929/ethz-b-000448848

URN/HDL:

20.500.11850/448848

reference search3 citations

Citations per year

Abstract:

In this dissertation, I will present the calculation of next-to-next-to-leading order perturbative QCD corrections to the production of a Higgs boson in association with a leptonically decaying weak vector boson: pp → V (→ ℓ¯ℓ) + H + X with V = W± and V = Z. Two subclasses of the processes are considered in two subsequent chapters: 1 The Higgs boson decays as H → b¯b to a bottom quark–antiquark pair with no additional restrictions on X. NNLO QCD corrections are also included in the decay, which is identified by requiring at least two b-jets among the final states. 2 The Higgs boson is produced on shell and X must contain at least one single unflavoured hadronic jet. A fully differential calculation is attained in both cases by implementing the processes into the parton-level event generator NNLOJET, using the antenna subtraction formalism to regulate infrared singularities. Numerical predictions for fiducial cross sections and differential distributions at 13TeV LHC collision energies are presented for both associated Higgs production classes. In most cases, the inclusion of NNLO corrections leads to a clear stabilization of the predictions and they contribute substantially to the reduction of residual theoretical uncertainties inherent to perturbative calculations. Lastly, the implementation of a brand new flavour-tagging layer into NNLOJET is considered in a separate chapter. This was quintessential for identifying b-jets and computing flavour-sensitive jet observables for LHC processes at NNLO precision in QCD.

physics
High-energy physics
LHC physics
Perturbative QCD
thesis
p p: scattering
Higgs particle: associated production
quantum chromodynamics: correction
perturbation theory
gauge boson: leptonic decay

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Figures(0)

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