QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations

Badger, Simon; Campbell, John M.; Ellis, R. Keith

doi:10.1007/jhep03(2011)027

Cited by 68 publications

(71 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, spinor-helicity methods can be used to provide compact expressions for one-loop scattering amplitudes as well, see e.g Refs. [84,19,143,144,106]. At the moment, it seems that the benefits of analytic computations lie more in clarifying the generic properties of the amplitudes, rather than in their phenomenological applications.…”

Section: Discussionmentioning

confidence: 99%

One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts

et al. 2012

View full text Add to dashboard Cite

The success of the experimental program at the Tevatron re-inforced the idea that precision physics at hadron colliders is desirable and, indeed, possible. The Tevatron data strongly suggests that one-loop computations in QCD describe hard scattering well. Extrapolating this observation to the LHC, we conclude that knowledge of many short-distance processes at next-to-leading order may be required to describe the physics of hard scattering. While the field of oneloop computations is quite mature, parton multiplicities in hard LHC events are so high that traditional computational techniques become inefficient. Recently new approaches based on unitarity have been developed for calculating one-loop scattering amplitudes in quantum field theory. These methods are especially suitable for the description of multi-particle processes in QCD and are amenable to numerical implementations. We present a systematic pedagogical description of both conceptual and technical aspects of the new methods.

show abstract

Section: Discussionmentioning

confidence: 99%

One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Processes that explicitly involve b-quarks in the final state, and process e.13, are calculated in the four-flavour scheme, while all of the others are in the five-flavour scheme. Results are available in the literature for W bb [68,[309][310][311][312], Zbb [68,311,313], ttγ [314], ttZ [68,315,316,363,364], ttW [68,316,317] production. For the majority of the processes in this table, NLO corrections are calculated in this work for the first time.…”

Section: Jhep07(2014)079mentioning

confidence: 99%

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

Alwall

Frederix

Frixione

et al. 2014

J. High Energ. Phys.

6,199

5,572

View full text Add to dashboard Cite

We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5 aMC@NLO, capable of handling all these computations -parton-level fixed order, shower-matched, merged -in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e + e − collider. While next-to-leading order results are restricted to QCD corrections to SM processes in the first public version, we show that from the user viewpoint no changes have to be expected in the case of corrections due to any given renormalisable Lagrangian, and that the implementation of these are well under way.

show abstract

“…As a result, QCD corrections in the production and in the decay can be handled separately. This scheme is implemented in Monte Carlo integrators such as MCFM [1][2][3] for specific processes involving the top quark. In that implementation, spin correlation effects are retained at next-to-leading-order accuracy (in the limit Γ → 0).…”

Section: Jhep03(2013)015mentioning

confidence: 99%

Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations

Artoisenet

Frederix

Mattelaer

et al. 2013

J. High Energ. Phys.

521

379

View full text Add to dashboard Cite

We present a general method that allows one to decay narrow resonances in Les Houches Monte Carlo events in an efficient and accurate way. The procedure preserves both spin correlation and finite width effects to a very good accuracy, and is therefore particularly suited for the decay of resonances in production events generated at next-to-leading-order accuracy. The method is implemented as a generic tool in the MadGraph5 framework, giving access to a very large set of possible applications. We illustrate the validity of the method and the code by applying it to the case of single top and top quark pair production, and show its capabilities on the case of top quark pair production in association with a Higgs boson.

show abstract

QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations

Cited by 68 publications

References 48 publications

One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts

One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations

Contact Info

Product

Resources

About