Vegas revisited: Adaptive Monte Carlo integration beyond factorization

Ohl, Thorsten

doi:10.1016/s0010-4655(99)00209-x

Cited by 131 publications

(121 citation statements)

References 4 publications

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“…The finite Catani-Seymour dipole subtraction terms and real emission matrix elements are built around amplitudes generated with the O'Mega [43] matrix-element generator. Adaptive single-channel Monte Carlo integration is implemented using the Vamp [44] library. Contrary to the first calculation, the second calculation does not implement subprocesses involving external bottom quarks which only amount to ≈ 3% of the LO cross section and thus can be safely neglected at order α 2 s α s .…”

Section: Conventions and Calculational Setupmentioning

confidence: 99%

Weak radiative corrections to dijet production at hadron colliders

Dittmaier

Huss

Speckner

2012

J. High Energ. Phys.

126

177

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Abstract:We present the calculation of the most important electroweak corrections to dijet production at the LHC and the Tevatron, comprising tree-level effects of O (α s α, α 2 ) and weak loop corrections of O (α 2 s α). Although negligible for integrated cross sections, these corrections can reach 10−20% in the TeV range for transverse jet momenta k T . Our detailed discussion of numerical results comprises distributions in the dijet invariant mass and in the transverse momenta of the leading and subleading jets. We find that the weak loop corrections amount to about −12% and −10% for leading jets with k T ∼ 3 TeV at the 14 TeV LHC and k T ∼ 800 GeV at the Tevatron, respectively. The electroweak tree-level contributions are of the same generic size and typically positive at the LHC and negative at the Tevatron at high energy scales. Generally the corrections to the dijet invariant mass distributions are smaller by at least a factor of two as compared to the corresponding reach in the k T distributions, because unlike the k T spectra the invariantmass distributions are not dominated by the Sudakov regime at high energy scales.

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Section: Conventions and Calculational Setupmentioning

confidence: 99%

Weak radiative corrections to dijet production at hadron colliders

Dittmaier

Huss

Speckner

2012

J. High Energ. Phys.

126

177

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“…The modern release series (v2) has been developed to meet the demands of LHC physics analysis, while its generic treatment of beam-spectra and initial-state photon radiation makes it especially well suited for lepton collider physics. The program has a modular structure and consists of several subcomponents, the most important being O'Mega [27], Vamp [62] and Circe [63]: O'Mega computes multi-leg tree-level matrix elements as helicity amplitudes in a recursive way that avoids Feynman diagrams. Vamp is used for Monte-Carlo integration and grid sampling.…”

Section: Jhep12(2016)075mentioning

confidence: 99%

NLO QCD predictions for off-shell t t ¯ $$ t\overline{t} $$ and t t ¯ H $$ t\overline{t}H $$ production and decay at a linear collider

Nejad¹,

Kilian²,

Lindert

et al. 2016

J. High Energ. Phys.

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We present predictions for tt and ttH production and decay at future lepton colliders including non-resonant and interference contributions up to next-to-leading order (NLO) in perturbative QCD. The obtained precision predictions are necessary for a future precise determination of the top-quark Yukawa coupling, and allow for top-quark phenomenology in the continuum at an unprecedented level of accuracy. Simulations are performed with the automated NLO Monte-Carlo framework Whizard interfaced to the OpenLoops matrix element generator.

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“…Its structure is strictly object-oriented, so that a modular structure enables the convenient interface to numerous other programs. The main sub-components of WHIZARD are O'Mega [2], VAMP [3] and CIRCE [4]: O'Mega provides multi-leg tree-level matrix elements using the helicity formalism. VAMP is used for Monte-Carlo integration and grid sampling.…”

Section: The Whizard Event Generatormentioning

confidence: 99%