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Calcul de la production d'une paire de bosons de jauge faible associée à un jet à l'approximation au-delà des logarithmes dominants

Abstract : The upcoming Large Hadron Collider (LHC) will get soon the first data from the collisions between protons at the TeV energy scale, in order to understand the electroweak symmetry breaking. Precise phenomenological studies for processes involving many particles in the final state are then required. A detailed theoretical knowledge of the Quantum Chromodynamics backgrounds is indispensable for these studies at the LHC. Among the processes with more than four particles, the production of a weak boson pair (W, Z) associated by a hadronic jet is identified as one of the Higgs searches background at the LHC. It is important to calculate the next-to-leading order QCD corrections to this process, which are composed of two parts : the virtual correction (a one-loop amplitude calculation) and the real emission (a tree level amplitude calculation but with one more parton in the final state). Compact analytical expressions have been evaluated numerically for the virtual part and are in agreement with the results obtained by two other independent research groups. Concerning the real emission, all contributions have been calculated by using packages for the generation of tree-level amplitudes. Thus, we are able to give precise predictions about the next-to-leading order corrections to the total cross section of this process at the LHC.
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Contributor : Grégory Sanguinetti <>
Submitted on : Monday, August 8, 2011 - 12:33:55 AM
Last modification on : Friday, November 6, 2020 - 3:30:41 AM
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  • HAL Id : tel-00331294, version 2

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Grégory Sanguinetti. Calcul de la production d'une paire de bosons de jauge faible associée à un jet à l'approximation au-delà des logarithmes dominants. Physique des Hautes Energies - Expérience [hep-ex]. Université de Savoie, 2008. Français. ⟨tel-00331294v2⟩

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