| Literature DB >> 25814870 |
Fabio Maltoni1, Kentarou Mawatari2, Marco Zaro3.
Abstract
Vector-boson fusion and associated production at the LHC can provide key information on the strength and structure of the Higgs couplings to the Standard Model particles. Using an effective field theory approach, we study the effects of next-to-leading order (NLO) QCD corrections matched to a parton shower on selected observables for various spin-0 hypotheses. We find that inclusion of NLO corrections is needed to reduce the theoretical uncertainties on the total rates as well as to reliably predict the shapes of the distributions. Our results are obtained in a fully automatic way via FeynRules and MadGraph5_aMC@NLO.Entities:
Year: 2014 PMID: 25814870 PMCID: PMC4371080 DOI: 10.1140/epjc/s10052-013-2710-5
Source DB: PubMed Journal: Eur Phys J C Part Fields ISSN: 1434-6044 Impact factor: 4.590
HC model parameters
| Parameter | Description |
|---|---|
|
| Cutoff scale |
|
| Mixing between |
|
| Dimensionless coupling parameter |
Values in units of taken by the couplings for the EW gauge bosons.
|
|
|
|
|
|---|---|---|---|
|
|
|
|
|
|
| 0 |
|
|
Benchmark scenarios
| Scenario | HC parameter choice |
|---|---|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VBF total cross sections with scale uncertainties and corresponding -factors at LHC 8TeV for various scenarios
| Scenario |
|
|
|
|---|---|---|---|
|
| 1509(1) | 1633(2) | 1.08 |
|
| 69.66(6) | 67.08(13) | 0.96 |
|
| 721.9(6) | 684.9(1.5) | 0.95 |
|
| 3065(2) | 3144(5) | 1.03 |
|
| 57.10(4) | 55.24(11) | 0.97 |
|
| 63.46(5) | 61.07(13) | 0.96 |
Fig. 1Distribution for the invariant mass of the two leading jets in VBF production with the acceptance cuts. The histograms in the main plot are normalised to unity
Fig. 2Distributions for , , , , , and in VBF with the acceptance cuts for the jets. The histograms in the main plots are normalised to unity
Fig. 3Same as Fig. 2, but with the additional VBF cut in Eq. (6)
total cross sections with scale uncertainties and corresponding -factors at LHC 8 TeV for various scenarios
| Scenario |
|
|
|
|---|---|---|---|
|
| 39.58(3) | 51.22(5) | 1.29 |
|
| 13.51(1) | 17.51(1) | 1.30 |
|
| 324.2(2) | 416.1(4) | 1.28 |
|
| 118.8(1) | 154.2(1) | 1.30 |
|
| 8.386(7) | 10.89(1) | 1.30 |
|
| 10.96(1) | 14.22(1) | 1.30 |
Same as Table 5, but for
| Scenario |
|
|
|
|---|---|---|---|
|
| 22.46(1) | 29.86(3) | 1.33 |
|
| 7.009(5) | 9.355(9) | 1.34 |
|
| 145.7(1) | 193.8(1) | 1.33 |
|
| 57.90(5) | 77.31(8) | 1.34 |
|
| 4.151(3) | 5.550(5) | 1.34 |
|
| 5.583(4) | 7.445(7) | 1.33 |
Same as Table 5, but for
| Scenario |
|
|
|
|---|---|---|---|
|
| 10.13(1) | 13.24(1) | 1.31 |
|
| 2.638(2) | 3.461(3) | 1.31 |
|
| 48.61(4) | 63.59(5) | 1.31 |
|
| 19.95(1) | 26.24(2) | 1.32 |
|
| 1.480(1) | 1.952(1) | 1.32 |
|
| 2.061(1) | 2.705(2) | 1.31 |
Fig. 4Distributions for , , and in (left) and in (right) production with the acceptance cuts for the lepton(s). The histograms in the main plots are normalised to unity
Fig. 5Distributions for and in with the acceptance cuts for the leptons. The histograms in the main plots are normalised to unity