An update on the next-to-leading order Monte Carlo MCFM

Ellis, R. Keith

doi:10.1016/j.nuclphysbps.2006.09.108

Cited by 28 publications

(12 citation statements)

References 22 publications

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“…The distributions are the result of a simulation including PDF effects (NN23LO1) and parton-showering and hadronization performed using an implementation from MCFM [135][136][137][138][139] into POWHEG [140] at NLO in QCD. We have checked that these results are consistent with a parallel implementation in MG5 MC@NLO [141] using the model implementation in [142] into NLO QCD, based on Feynrules [143] and the UFO [144] format.…”

Section: The Validity Of the Eft: From Operators To Total Rates And Dmentioning

confidence: 99%

Benchmarks for Higgs effective theory: extended Higgs sectors

Gorbahn

Sanz

2015

J. High Energ. Phys.

101

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Precise measurements of SM particles properties at the LHC allows to look for heavy New Physics in the context of an Effective Field Theory (EFT). These searches, however, often rely on kinematic regions where the validity of the EFT may be compromised. In this paper we propose to address this issue by comparing with benchmark models. The connection between models and their manifestations as EFTs at low energies allows us to quantify the breakdown of the EFT, and describe ways to combine different sources of constraints beyond Higgs physics. To illustrate these techniques, in this paper we propose a set of benchmark models based on extensions of the Higgs sector, namely the inclusion of a singlet, a dilaton and generic 2HDMs. We obtain the matching between these models and the EFT involving the Higgs, electroweak bosons and fermions. We then describe current and future indirect and direct constraints, consider the effect of correlations among the coefficients within models, and discuss the validity of the EFT.

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Section: The Validity Of the Eft: From Operators To Total Rates And Dmentioning

confidence: 99%

Benchmarks for Higgs effective theory: extended Higgs sectors

Gorbahn

Sanz

2015

J. High Energ. Phys.

101

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“…We also implemented the top-partner in MCFM [112][113][114][115][116] to check our results. 8 For the SM, our calculation includes the effects of both the bottom and top quarks; for the top-partner scenarios we include the top, top-partner (with θ R dependent Yukawa couplings), and bottom quark contributions.…”

Section: Including the Effect Of Pdfs And Runningmentioning

confidence: 99%

“…Given this situation, the best one can do is to evaluate the NLO effects, differentially, in the infinite top mass limit. We have evaluated the K-factor, the LO and NLO Higgs plus jets using MCFM [112][113][114][115][116] in the infinite top mass limit in the differential distribution dσ/dp T . The K-factor is rather flat (roughly O(2)) as a function of p T for µ = p 2 T + m 2 H , but has a slope for µ = m H .…”

Section: Stability Against Higher Order Corrections and Experimental mentioning

confidence: 99%

Probing top-partners in Higgs+jets

Banfi

Martin

Sanz

2014

J. High Energ. Phys.

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Fermionic top-partners arise in models such as Composite Higgs and Little Higgs. They modify Higgs properties, in particular how the Higgs couples to top quarks. Alas, there is a low-energy cancellation acting in the coupling of the Higgs boson to gluons and photons. As a result of this cancellation, no information about the spectrum and couplings of the top-partners can be obtained in gg → h, just the overall new physics scale f . In this paper we show that this is not the case when hard radiation is taken into account. Indeed, differential distributions in Higgs plus jets are sensitive to the top-partner mass and coupling to the Higgs. We exploit the transverse momentum distribution of the hard jet to estimate limits on the top-partners in the 14 TeV LHC run. Relying on h → γγ events alone, we find mixing angles of sin 2 (θ R ) 0.2 can be probed after 3000 fb −1 of 14 TeV LHC data. Including other modes, the sensitivity improves, up to sin 2 (θ R ) 0.05 after 300 fb −1 .

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“…We then use the p T of the Z from WZ events to test the WWZ vertex. We consider the anomalous triple gauge couplings λ , δ g, δ κ as defined in [4] and [5] and implemented in MCFM. In the Standard Model all three of these couplings are zero.…”

Section: Wz Cross Section and Tgcmentioning

confidence: 99%

Diboson production (CDF)

Cavaliere

2010

Proceedings of European Physical Society Europhysics Conference on High Energy Physics — PoS(EPS-HEP 2009)

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WW and WZ production in pp collisions at 1.96 TeV are studied in samples of ∼ 3 fb −1 of data using leptons, jets and missing E T . Fully leptonic decays as well as semi-leptonic decays are measured. Diboson production is expected in the standard model, and predicted cross sections are confirmed. It is important to investigate various signatures as associated production of Higgs bosons is topologically similar.

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An update on the next-to-leading order Monte Carlo MCFM

Abstract: The current status of the parton level, next-to-leading order Monte Carlo program MCFM is described.

Cited by 28 publications

References 22 publications

Benchmarks for Higgs effective theory: extended Higgs sectors

Benchmarks for Higgs effective theory: extended Higgs sectors

Probing top-partners in Higgs+jets

Diboson production (CDF)

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