searches in gluon fusion at the LHC
نویسنده
چکیده
WW/ZZ interference for Higgs signal and continuum background as well as signal-background interference is studied for same-flavour lν̄ll̄νl final states produced in gluon-gluon scattering at the LHC for light and heavy Higgs masses with minimal and realistic experimental selection cuts. For the signal cross section, we find WW/ZZ interference effects of O(5%) at MH = 126 GeV. For MH ≥ 200 GeV, we find that WW/ZZ interference is negligible. For the gg continuum background, we also find that WW/ZZ interference is negligible. As general rule, we conclude that non-negligible WW/ZZ interference effects occur only if at least one weak boson of the pair is dominantly off-shell due to kinematic constraints. The subdominant weak boson pair contribution induces a correction to the signal-background interference, which is at the few percentage point level before search selection cuts. Optimised selection cuts for MH & 600 GeV are suggested.
منابع مشابه
Gluon-induced WW background to Higgs boson searches at the LHC
Vector-boson pair production is an important background for Higgs boson and new physics searches at the Large Hadron Collider LHC. We have calculated the loop-induced gluon-fusion process gg → WW → leptons, allowing for arbitrary invariant masses of the intermediate W bosons. This process contributes at O(αs ) relative to quarkantiquark annihilation, but its importance is enhanced by the large ...
متن کاملGluon-induced W -boson pair production at the LHC
Pair production of W bosons constitutes an important background to Higgs boson and new physics searches at the Large Hadron Collider LHC. We have calculated the loop-induced gluon-fusion process gg → W W ∗ → leptons, including intermediate light and heavy quarks and allowing for arbitrary invariant masses of the W bosons. While formally of next-to-next-to-leading order, the gg → W W ∗ → leptons...
متن کاملHiggs plus two jet production via gluon fusion as a signal at the CERN LHC
Higgs boson production in association with two tagging jets will be mediated by electroweak vector boson fusion and by gluon fusion processes at the CERN LHC. The characteristic distributions for the gluon fusion process are analyzed for the H → W+W− signal at mH = 160 GeV, with subsequent leptonic decay of the W -pair. The dominant backgrounds from top-quark pair production, WWjj production an...
متن کاملMeasuring Trilinear Higgs Coupling in WHH and ZHH Productions at the HL-LHC
Determination of trilinear Higgs coupling (λHHH = κλ SM HHH) through Higgs pair productions is a major motivation for the LHC high luminosity phase. We perform a detailed collider simulation to explore the potential of measuring λHHH in the V HH (V = W,Z) production at the HL-LHC. We find that the trilinear Higgs coupling in the SM (λ HHH) could be measured at the level of 1.3σ. Combining with ...
متن کاملHadronic Production of the Doubly Charmed Baryon Ξcc with Intrinsic Charm
We study effects of the intrinsic charm on the hadronic production of Ξcc at SELEX, Tevatron and LHC. By taking the intrinsic charm into account, the cross-section of the production at SELEX is changed significantly. In contrast, at LHC and Tevatron the change is small because the gluon-gluon fusion becomes dominant. The measured cross-section at SELEX is much larger than the prediction based o...
متن کامل