NLO Corrections to Hard Process in Parton Shower MC --- {\sf KrkNLO} Method

Jadach, S.; Płaczek, W.; Sapeta, Sebastian; Siódmok, Andrzej; Skrzypek, M.

doi:10.5506/aphyspolb.46.2089

Cited by 8 publications

(13 citation statements)

References 19 publications

(24 reference statements)

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“…In this sense, it is close in spirit to the works in refs. [43][44][45][46][47][48][49][50][51], in refs. [52][53][54][55][56][57][58], and in refs.…”

Section: Jhep01(2018)070mentioning

confidence: 99%

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Hautmann

Jung

Žlebčík

et al. 2018

J. High Energ. Phys.

112

115

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We study parton-branching solutions of QCD evolution equations and present a method to construct both collinear and transverse momentum dependent (TMD) parton densities from this approach. We work with next-to-leading-order (NLO) accuracy in the strong coupling. Using the unitarity picture in terms of resolvable and non-resolvable branchings, we analyze the role of the soft-gluon resolution scale in the evolution equations. For longitudinal momentum distributions, we find agreement of our numerical calculations with existing evolution programs at the level of better than 1% over a range of five orders of magnitude both in evolution scale and in longitudinal momentum fraction. We make predictions for the evolution of transverse momentum distributions. We perform fits to the high-precision deep inelastic scattering (DIS) structure function measurements, and we present a set of NLO TMD distributions based on the parton branching approach.

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“…In this sense, it is close in spirit to the works in refs. [43][44][45][46][47][48][49][50][51], in refs. [52][53][54][55][56][57][58], and in refs.…”

Section: Jhep01(2018)070mentioning

confidence: 99%

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Hautmann

Jung

Žlebčík

et al. 2018

J. High Energ. Phys.

112

115

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“…In this article, we present NLO+PS predictions for various differential distributions computed with the KrkNLO approach [22,23]. The main advantage of the KrkNLO method with respect to other methods of matching the fixed-order NLO calculations with PSMCs (MC@NLO and POWHEG) is its simplicity, which stems from the fact that the entire NLO corrections are implemented using a simple, positive, multiplicative MC weight in combination with pre-calculated MC-scheme PDFs.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulations of Higgs-boson production at the LHC with the KrkNLO method

et al. 2017

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We present numerical tests and predictions of the KrkNLO method for matching of NLO QCD corrections to hard processes with LO parton-shower Monte Carlo generators (NLO+PS). This method was described in detail in our previous publications, where it was also compared with other NLO+PS matching approaches (MC@NLO and POWHEG) as well as fixed-order NLO and NNLO calculations. Here we concentrate on presenting some numerical results (cross sections and distributions) for Z /γ * (DrellYan) and Higgs-boson production processes at the LHC. The Drell-Yan process is used mainly to validate the KrkNLO implementation in the Herwig 7 program with respect to the previous implementation in Sherpa. We also show predictions for this process with the new, complete, MC-scheme parton distribution functions and compare them with our previously published results. Then we present the first results of the KrkNLO method for Higgs production in gluon-gluon fusion at the LHC and compare them with MC@NLO and POWHEG predictions from Herwig 7, fixed-order results from HNNLO and a resummed calculation from HqT, as well as with experimental data from the ATLAS collaboration.

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“…Well-known examples of these are the MC@NLO method [1], the POWHEG method [2], and more recently, the KrKNLO method [3]. Here I will be focussing on the MC@NLO method, which removes the double-counting between the fixed-order calculation and the PS by subtracting explicitly the PS contributions in the NLO.…”

Section: Merging and Matchingmentioning

confidence: 99%

Multi-jet production in association with an electroweak vector boson

Papaefstathiou¹

2017

Proceedings of XXV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2017)

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I will be discussing the production of a single Z or W boson in association with jets at the Large Hadron Collider. I will be presenting results obtained by matching next-to-leading order QCD predictions with the Herwig 7 and Pythia 8 parton showers, and by merging all of the underlying matrix elements with up to two light partons at the Born level. These will be compared to several experimental measurements by the ATLAS and CMS collaborations.

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NLO Corrections to Hard Process in Parton Shower MC --- {\sf KrkNLO} Method

Cited by 8 publications

References 19 publications

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Monte Carlo simulations of Higgs-boson production at the LHC with the KrkNLO method

Multi-jet production in association with an electroweak vector boson

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