Ken Arnold

Publications (3)5.83 Total impact

• Source

  Available from: ArXiv

  Article: Next-to-leading order QCD corrections to Higgs boson production in association with a photon via weak-boson fusion at the LHC

  Ken Arnold, Terrance Figy, Barbara Jäger, Dieter Zeppenfeld
  [show abstract] [hide abstract]
  ABSTRACT: Higgs boson production in association with a hard central photon and two forward tagging jets is expected to provide valuable information on Higgs boson couplings in a range where it is difficult to disentangle weak-boson fusion processes from large QCD backgrounds. We present next-to-leading order QCD corrections to Higgs production in association with a photon via weak-boson fusion at a hadron collider in the form of a flexible parton-level Monte Carlo program. The QCD corrections to integrated cross sections are found to be small for experimentally relevant selection cuts, while the shape of kinematic distributions can be distorted by up to 20% in some regions of phase space. Residual scale uncertainties at next-to-leading order are at the few-percent level. KeywordsNLO Computations–Higgs Physics–QCD–Standard Model
  Journal of High Energy Physics 04/2012; 2010(8):1-17. · 5.83 Impact Factor
• Source

  Available from: ArXiv

  Article: Higgs boson production in association with a photon via weak boson fusion

  Ken Arnold, Terrance Figy, Barbara Jager, Dieter Zeppenfeld
  [show abstract] [hide abstract]
  ABSTRACT: We present next-to-leading order QCD corrections to Higgs production in association with a photon via weak boson fusion at a hadron collider. Utilizing the fully flexible parton level Monte-Carlo program VBFNLO, we find small overall corrections, while the shape of some distributions is sensitive to radiative contributions in certain regions of phase-space. Residual scale uncertainties at next-to-leading order are at the few-percent level. Being perturbatively well under control and exhibiting kinematic features that allow to distinguish it from potential backgrounds, this process can serve as a valuable source of information on the $Hb\bar{b}$ Yukawa coupling.
  10/2011;
• Source

  Available from: Jeppe Rosenkrantz Andersen

  Article: Azimuthal Angle Correlations for Higgs Boson plus Multi-Jet Events

  Jeppe R. Andersen, Ken Arnold, Dieter Zeppenfeld
  [show abstract] [hide abstract]
  ABSTRACT: At lowest order in perturbation theory, the scattering matrix element for Higgs boson production in association with dijets displays a strong correlation in the azimuthal angle between the dijets, induced by the CP-properties of the Higgs Boson coupling. However, the phase space cuts necessary for a clean extraction of the CP-properties simultaneously induce large corrections from emissions of hard radiation and thus formation of extra jets. The current study concerns the generalization of CP-studies using the azimuthal angle between dijets beyond tree-level and to events with more than just two jets. By analyzing the High Energy Limit of hard scattering matrix elements we arrive at a set of cuts optimized to enhance the correlation, while maintaining a large cross section, and an observable, which is very stable against higher order corrections. We contrast the description of Higgs boson production in association with jets at different levels: for tree-level hjj and hjjj matrix elements, for hjj matrix elements plus parton shower, and in a recent all-order framework, which converges to the full, all-order perturbative result in the limit of large invariant mass between all produced particles. Comment: 23 pages
  01/2010;