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EW corrections to Higgs strahlung at the Tevatron and the LHC with HAWK

Ansgar Denner, Stefan Dittmaier, Stefan Kallweit, Alexander Muck

TL;DR

The paper addresses the need for precision predictions of Higgs-strahlung processes at hadron colliders by incorporating NLO electroweak corrections into the Hawk Monte Carlo. It demonstrates that EW corrections reduce cross sections by roughly 5–10% overall and become more negative at high transverse momenta, reaching about -15% for boosted Higgs scenarios at the LHC, especially in WH channels. The use of a complex-mass scheme ensures reliable treatment of resonant vector-boson effects and threshold regions. The results provide differential predictions essential for LHC analyses and boost the accuracy of background modeling in Higgs searches.

Abstract

We briefly report on the inclusion of NLO QCD and electroweak corrections to the Higgs-strahlung processes pp/ppbar -> HW/Z -> H+2leptons in the Monte Carlo program HAWK. The electroweak corrections, which are at the level of -(5-10)% for total cross sections, further increase in size with increasing transverse momenta (p_T) in differential cross sections. For instance, for p_{T,H}>200GeV, which is the interesting range at the LHC, the electroweak corrections to WH production reach about -15% for M_H=120GeV.

EW corrections to Higgs strahlung at the Tevatron and the LHC with HAWK

TL;DR

The paper addresses the need for precision predictions of Higgs-strahlung processes at hadron colliders by incorporating NLO electroweak corrections into the Hawk Monte Carlo. It demonstrates that EW corrections reduce cross sections by roughly 5–10% overall and become more negative at high transverse momenta, reaching about -15% for boosted Higgs scenarios at the LHC, especially in WH channels. The use of a complex-mass scheme ensures reliable treatment of resonant vector-boson effects and threshold regions. The results provide differential predictions essential for LHC analyses and boost the accuracy of background modeling in Higgs searches.

Abstract

We briefly report on the inclusion of NLO QCD and electroweak corrections to the Higgs-strahlung processes pp/ppbar -> HW/Z -> H+2leptons in the Monte Carlo program HAWK. The electroweak corrections, which are at the level of -(5-10)% for total cross sections, further increase in size with increasing transverse momenta (p_T) in differential cross sections. For instance, for p_{T,H}>200GeV, which is the interesting range at the LHC, the electroweak corrections to WH production reach about -15% for M_H=120GeV.

Paper Structure

This paper contains 2 sections, 2 figures.

Table of Contents

  1. Introduction
  2. Numerical results on NLO corrections

Figures (2)

  • Figure 1: html:<A name="ref-fi:pth">html:</A> LAB: fi:pth Hawk prediction for the absolute $p_{\mathrm{T},\mathrm{H}$H$}$ distributions (top) and NLO EW corrections for recombined (middle) and bare (bottom) leptons for Higgs strahlung with basic cuts at the Tevatron (left) as well as for boosted Higgs bosons at the 7 TeV LHC (right) for $M\mathrm{H}$H$$M_$\mathrm{H}$$=120$ GeV.
  • Figure 2: html:<A name="ref-fig:mH">html:</A> LAB: fig:mH Hawk prediction for the EW corrections to the cross sections for $\mathrm{H}$H$l$l$^+l$l$^-$ (left) and $\mathrm{H}$H$l$l$^+\nu_l$l$$ (right) production with basic cuts at the Tevatron and for boosted Higgs bosons at the 7 TeV LHC as a function of the Higgs-boson mass.