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Precision physics at the large hadron collider

Abstract : With the advent of the LHC, particle physics has entered an era where high precision is required. In this thesis, we tackle two of the key processes at hadron colliders using innovative tools: inclusive jet production and Higgs production through vector-boson fusion (VBF). In the first part of this thesis, we show how to resum leading logarithmic terms of the jet radius R, and apply this formalism to a detailed study of the inclusive jet spectrum. We study subleading R-dependent terms at next-to-next-to-leading order (NNLO), and incorporate them into our calculation. We investigate cancellations in the scale dependence, leading to new prescriptions for evaluating uncertainties, and examine the impact of non-perturbative effects. In the second part of the thesis, we study QCD corrections in VBF-induced Higgs production. Using the structure function approach, we compute the next-to-next-to-next-to-leading order (NNNLO) corrections to the inclusive cross section. We then calculate the fully differential NNLO corrections to VBF Higgs production. We show that these contributions are substantial after VBF cuts, lying outside the NLO scale uncertainty bands.
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Submitted on : Thursday, December 1, 2016 - 7:41:06 PM
Last modification on : Thursday, December 10, 2020 - 11:04:25 AM
Long-term archiving on: : Tuesday, March 21, 2017 - 1:03:55 PM


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  • HAL Id : tel-01407230, version 1


Frédéric Dreyer. Precision physics at the large hadron collider. High Energy Physics - Phenomenology [hep-ph]. Université Pierre et Marie Curie - Paris VI, 2016. English. ⟨NNT : 2016PA066170⟩. ⟨tel-01407230⟩



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