Matching matrix elements and shower evolution for top-pair production in hadronic collisions

@article{Mangano2007MatchingME,
  title={Matching matrix elements and shower evolution for top-pair production in hadronic collisions},
  author={Michelangelo L. Mangano and Mauro Moretti and Fulvio Piccinini and Michele Treccani},
  journal={Journal of High Energy Physics},
  year={2007},
  volume={2007},
  pages={013-013}
}
We study the matching of multijet matrix elements and shower evolution in the case of top production in hadronic collisions at the Tevatron and at the LHC. We present the results of the matching algorithm implemented in the ALPGEN Monte Carlo generator, and compare them with results obtained at the parton level, and with the predictions of the MC@NLO approach. We highlight the consistency of the matching algorithm when applied to these final states, and the excellent agreement obtained with MC… 

Hadronic top-quark pair-production with one jet and parton showering

A bstractWe present a calculation of heavy-flavor production in hadronic collisions in association with one jet matched to parton shower Monte Carlo programs at next-to-leading order in perturbative

QCD matrix elements and truncated showers

We derive an improved prescription for the merging of matrix elements with parton showers, extending the CKKW approach. A flavour-dependent phase space separation criterion is proposed. We show that

Revisiting slepton pair production at the Large Hadron Collider

A bstractMotivated by the shift in experimental attention towards electroweak super-symmetric particle production at the CERN LHC, we update in this paper our precision predictions at next-to-leading

Jet matching and subtraction methods for associated squark-gluino production

In hadron-hadron collisions, e. g. at the Large Hadron Collider (LHC) at CERN in Geneva, one of the most promising signatures for physics beyond the Standard Model is jets plus missing transverse

Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: phenomenological studies for the Tevatron and the LHC

We report on the calculation of the next-to-leading order QCD corrections to the production of top–antitop-quark pairs in association with a hard jet at the Tevatron and at the LHC. Results for

Study on the azimuthal angle correlation between two jets in the top quark pair production

An azimuthal angle correlation between the two hardest jets is studied in the ttbar production process at the 14 TeV LHC. The event samples are generated by merging the tree level matrix elements for

Next-to-Leading-Order Event Generators

We review the methods developed for combining the parton shower approximation to quantum chromodynamics with fixed-order perturbation theory so as to achieve next-to-leading-order (NLO) accuracy for

Modelling electroweak physics for the forward region

This note presents a study of matching and merging schemes and weak showering at the LHC as applied to the production of electroweak bosons in association with jets. These advanced theoretical tools

Multi-jet phenomenology for hadron colliders in the high energy limit

We have incorporated next-to-leading logarithmic corrections into the High Energy Jets (HEJ) formalism and parton-level Monte Carlo generator for $W$ plus inclusive dijet production. This has

Scrutinizing the Top Quark at Lepton Colliders with Higher Orders : From Fixed Order to Resummation and Matching

In this thesis, we present detailed studies of top-pair production with (tt̄H) and without association of a Higgs boson (tt̄) in e + e − collisions. These processes are of utmost interest for the top
...

References

SHOWING 1-10 OF 44 REFERENCES

QCD Matrix Elements + Parton Showers

We propose a method for combining QCD matrix elements and parton showers in Monte Carlo simulations of hadronic flnal states in e + e i annihilation. The matrix element and parton shower domains are

Matching NLO QCD and parton showers in heavy flavour production

We apply the MC@NLO approach to the process of heavy flavour hadroproduction. MC@NLO is a method for matching next-to-leading order (NLO) QCD calculations and parton shower Monte Carlo (MC)

Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA

We report on our exploration of matching matrix element calculations with the parton-shower models contained in the event generators HERWIG and PYTHIA. We describe results for e + e i collisions and

Matching NLO QCD computations and parton shower simulations

We propose a method for matching the next-to-leading order (NLO) calculation of a given QCD process with a parton shower Monte Carlo (MC) simulation. The method has the following features: fully

Parton Showers and Multijet Events

A Monte-Carlo event-generator has been developed which is dedicated to simulate electron-positron annihilations. Especially a new approach for the combination of matrix elements and parton showers

Single-top production in MC@NLO

We match next-to-leading order QCD results for single-top hadroproduction with parton shower Monte Carlo simulations, according to the prescription of the MC@NLO formalism. In this way, we achieve

W+jets matrix elements and the dipole cascade

We extend the algorithm for matching fixed-order tree-level matrix element generators with the Dipole Cascade Model in Ariadne to apply to processes with incoming hadrons. We test the algoritm on for

HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes)

HERWIG is a general-purpose Monte Carlo event generator, which includes the simulation of hard lepton-lepton, lepton-hadron and hadron-hadron scattering and soft hadron-hadron collisions in one