MCFM for the Tevatron and the LHC

Campbell, John M.; Ellis, R. Keith

doi:10.1016/j.nuclphysbps.2010.08.011

Cited by 579 publications

(584 citation statements)

References 38 publications

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“…The CMS measurements [12] of W þ charm used in the present analysis are obtained for the transverse momenta of the lepton from W-decay larger than 35 GeV. The cross sections of W þ charm production at CMS are determined at the parton level and the theory predictions for the CMS measurements used in the present analysis are calculated at NLO by using the MCFM program [50,51] interfaced to APPLGRID [52]. The ATLAS measurement [13] of associated W þ charm production is performed at the hadron level taking the transverse momentum of the W-decay lepton greater than 20 GeV.…”

Section: B Inclusive Charm Production In ν-Emulsion Interactionsmentioning

confidence: 99%

Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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We present an improved determination of the strange sea distribution in the nucleon with constraints coming from the recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA. We demonstrate that the results are consistent with the data from the ATLAS and the CMS experiments on the associated production of W AE -bosons with c-quarks. We also discuss issues related to the recent strange sea determination by the ATLAS experiment using LHC collider data.

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Section: B Inclusive Charm Production In ν-Emulsion Interactionsmentioning

confidence: 99%

Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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“…On-shell and off-shell events from gluon fusion production are generated with the MCFM 6.7 [24,41,42] and GG2VV 3.1.5 [43] MC generators while those for the VBF and associated production with an electroweak boson V are generated with PHANTOM 1.2.3 [44]. The leptonic decay of the associated V boson is modeled with a reweighting procedure based on the branching ratios of the V boson [45], and the relatively small contribution of HH production is removed from the PHANTOM simulation.…”

Section: The Cms Experiments and Simulationmentioning

confidence: 99%

Limits on the Higgs boson lifetime and width from its decay to four charged leptons

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2015

Phys. Rev. D

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Constraints on the lifetime and width of the Higgs boson are obtained from H → ZZ → 4l events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb −1 at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of τ H < 1.9 × 10 −13 s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of Γ H > 3.5 × 10 −9 MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter f ΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is Γ H < 46 MeV with f ΛQ unconstrained and Γ H < 26 MeV for f ΛQ ¼ 0 at the 95% C.L. The constraint f ΛQ < 3.8 × 10 −3 at the 95% C.L. is obtained for the expected standard model Higgs boson width.

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“…An increase in the order of 10 -30 is common in the region of parameter space we consider. For reference, we provide the production cross sections of these modes obtained in MCFM [21,22] and HDECAY [23] through the SM Higgs boson in Table I. Although not shown in the figure, we point out that suppressions of the event rate in the W W and ZZ channels are on the order of 10 −2 to 10 −3 relative to the SM.…”

Section: Phenomenologymentioning

confidence: 99%

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

2011

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An electroweak singlet scalar can couple to pairs of vector bosons through loop-induced dimension five operators. Compared to a Standard Model Higgs boson, the singlet decay widths in the diphotons and Zγ channels are generically enhanced, while decays into massive final states like W W and ZZ are kinematically disfavored. The overall event rates into γγ and Zγ can exceed the Standard Model expectations by orders of magnitude. Such a singlet may appear as a resonant signal in the γγ and Zγ channels, even with a mass above the W W kinematic threshold.

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MCFM for the Tevatron and the LHC

Cited by 579 publications

References 38 publications

Determination of strange sea quark distributions from fixed-target and collider data

Determination of strange sea quark distributions from fixed-target and collider data

Limits on the Higgs boson lifetime and width from its decay to four charged leptons

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

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