Resummation effects in vector-boson and Higgs associated production

Dawson, S.; Han, Tao; Lai, Wai Kin; Leibovich, Adam K.; Lewis, Ian M.

doi:10.1103/physrevd.86.074007

Cited by 31 publications

(32 citation statements)

References 56 publications

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“…The jet veto reverses the sign of the higher-order QCD correction compared to the inclusive case, and reduces the total cross section. Recently there have been works on the transverse-momentum resummation of V + H [14] and on the jet veto resummation [15] for the Higgsstrahlung process. Neither study addressed the impact of the jet veto as a function of the transverse momentum of V or H, which is required to understand the QCD corrections in the boosted phase-space region.…”

Section: Jhep06(2014)028mentioning

confidence: 99%

High precision predictions for exclusive V H production at the LHC

Liu

2014

J. High Energ. Phys.

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We present a resummation-improved prediction for pp → V H + 0 jets at the Large Hadron Collider. We focus on highly-boosted final states in the presence of jet veto to suppress the tt background. In this case, conventional fixed-order calculations are plagued by the existence of large Sudakov logarithms α n s log m (p veto T /Q) for Q ∼ m V + m H which lead to unreliable predictions as well as large theoretical uncertainties, and thus limit the accuracy when comparing experimental measurements to the Standard Model. In this work, we show that the resummation of Sudakov logarithms beyond the next-tonext-to-leading-log accuracy, combined with the next-to-next-to-leading order calculation, reduces the scale uncertainty and stabilizes the perturbative expansion in the region where the vector bosons carry large transverse momentum. Our result improves the precision with which Higgs properties can be determined from LHC measurements using boosted Higgs techniques.

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Section: Jhep06(2014)028mentioning

confidence: 99%

High precision predictions for exclusive V H production at the LHC

Liu

2014

J. High Energ. Phys.

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“…(3.5) can be refactorized into an exponential form at NLL accuracy aŝ 17) where the transverse momentum has been integrated over andN = N e γ E . The one-loop approximation of the QCD evolution operator U…”

Section: Iii22 Nll Threshold Resummationmentioning

confidence: 99%

“…[17,18]. The calculation for the NNLO QCD corrections to the SM Higgs boson production in association with a Z-boson at hadron colliders has been implemented by O. Brein et al [9].…”

Section: Introductionmentioning

confidence: 99%

HZassociated production at the LHC within the littlest Higgs model atNLO+NLLaccuracy

et al. 2016

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We consider the HZ associated production at the 14 TeV LHC in the littlest Higgs model (LHM) and study the corrections of the transverse momentum resummation and threshold resummation at the next-to-leading logarithmic (NLL) accuracy and the fixed-order prediction at the QCD next-to-leading order (NLO) including the contribution from the one-loop-induced gg-fusion channel. The QCD NLO+NLL effects on the integrated cross section and the distributions of transverse momentum and invariant mass of the HZ system for the HZ production in the LHM are discussed. The distributions of transverse momentum and invariant mass of the HZ system are evaluated by means of the transverse momentum resummation and threshold resummation, respectively. We estimate their scale uncertainties and find that the predictions obtained at the QCD NLO+NLL accuracy are much more reliable than those using the pure NLO approach. We see also that the relative deviation between the results in the LHM and the standard model is considerably reduced by the resummation effects, but still observable.

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“…When leptonic decay modes of W ± is considered, the semi-leptonic decays of tt can become a significant irreducible background. Due to the fact that the SM top quark pair production has more hard jets from decay of top quark than the HW ± process, a jet veto can be used to suppress tt background [15]. Thus, a veto on the additional undesired jets p jet T < p veto T is needed to distinguish the signal and background process, and improve the significance of HW ± production.…”

Section: Jhep02(2014)117mentioning

confidence: 99%

“…Nevertheless, the jet veto efficiency for HV associated production have be approximated studied in ref. [15], where the jet veto cross section is defined as σ(p T, HV ) = p T,HV 0 dp T, HV dσ dp T, HV .…”

Section: Jhep02(2014)117mentioning

confidence: 99%

Resummation prediction on Higgs and vector boson associated production with a jet veto at the LHC

Shao

2014

J. High Energ. Phys.

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Abstract:We investigate the resummation effects for the SM Higgs and vector boson associated production at the LHC with a jet veto in soft-collinear effective theory using "collinear anomalous" formalism. We calculate the jet vetoed invariant mass distribution and the cross section for this process at Next-to-Next-to-Leading-Logarithmic level, which are matched to the QCD Next-to-Leading Order results, and compare the differences of the resummation effects with different jet veto p veto T and jet radius R. Our results show that both resummation enhancement effects and the scale uncertainties decrease with the increasing of jet veto p veto T and jet radius R, respectively. When p veto T = 25 GeV and R = 0.4 (0.5), the resummation effects reduce the scale uncertainties of the Next-to-Leading Order jet vetoed cross sections to about 7% (6%), which lead to increased confidence on the theoretical predictions. Besides, after including resummation effects, the PDF uncertainties of jet vetoed cross section are about 7%.

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Resummation effects in vector-boson and Higgs associated production

Cited by 31 publications

References 56 publications

High precision predictions for exclusive V H production at the LHC

High precision predictions for exclusive V H production at the LHC

HZassociated production at the LHC within the littlest Higgs model atNLO+NLLaccuracy

Resummation prediction on Higgs and vector boson associated production with a jet veto at the LHC

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