The CCFM uPDF evolution uPDFevolv Version 1.0.00

Hautmann, F.; Jung, H.; Monfared, S. Taheri

doi:10.1140/epjc/s10052-014-3082-1

Cited by 78 publications

(113 citation statements)

References 41 publications

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“…In section 4 we illustrate an application of our method by performing a fit to the high-precision DIS data [61]. For the fit we use an updated version of the program [67] within the xFitter open-source QCD fit platform [68]. By the method of the present paper we are able to extend the fit [27] to precision DIS data significantly toward higher x and higher Q 2 .…”

Section: Jhep01(2018)070mentioning

confidence: 99%

“…However, using a full Monte Carlo solution of the evolution equation for every new set of initial parameters would be too time-consuming to be efficient. Instead, we employ the approach developed in [27,67]. Following this approach, first a kernel A b a x , µ 2 is determined from the Monte Carlo solution of the evolution equation for any initial parton of flavor b evolving to a final parton of flavor a; 5 then, this is folded 5 In practice, since the initial state partons can be only light quarks or gluons, it is enough to determine the kernel A b a only for one initial state quark and a gluon.…”

Section: Fit To Precision Dis Datamentioning

confidence: 99%

“…−(z + 1) 67 18 − π 2 6 + C F T R N f − 16 3 + 40 3 z + 10z + 16 3 z 2 + 2 ln z − 112 9 z 2 + 40 9z − 2(1 + z) ln 2 z − 2 3 ln zp qq (z) + 10 9 (z + 1) . (A.13)…”

Section: Jhep01(2018)070unclassified

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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.

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111

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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Section: Jhep01(2018)070mentioning

confidence: 99%

Section: Fit To Precision Dis Datamentioning

confidence: 99%

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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.

Self Cite

111

115

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“…To this end, in [15] the evolution of the gluon density is obtained by combining the resummation of small-x logarithmic contributions [29] with medium-x and large-x contributions to parton splitting [30] according to the CCFM evolution equations [31]. This is done via the exclusive parton-branching Monte Carlo implementation [32] of CCFM evolution.…”

Section: Tmds From the Combined Hera Datamentioning

confidence: 99%

“…The Monte Carlo implementation [32] of CCFM evolution includes two-loop running coupling, finite-x gluon splitting and energy-momentum consistency constraint [15,36]. In addition to the gluon-induced process γ * g * → qq the contribution from valence quarks is included via γ * q → q by using a CCFM evolution of valence quarks [37].…”

Section: Tmds From the Combined Hera Datamentioning

confidence: 99%

Hadron structure beyond collinear level and precision DIS measurements

Hautmann

Jung

2015

EPJ Web of Conferences

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Abstract. General formulations of QCD factorization for hadronic collisions extend the notion of ordinary parton distributions to transverse-momentum dependent (TMD) parton density and parton decay functions. We discuss the use of the recent high-precision deep-inelastic scattering (DIS) measurements for determination of TMD distributions. These are relevant for both low-p T and high-p T physics in hadron collisions. We comment on applications to multi-jet final states associated with electroweak gauge boson production at the LHC.

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Associated Production of W + Charm in 13 TeV Proton-Proton Collisions Measured with CMS and Determination of the Strange Quark Content of the Proton

Pflitsch¹

2020

Springer Theses

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In dieser Arbeit wird die Messung der assoziierten Produktion eines W ± Bosons und eines Charm-Quarks in Proton-Proton Kollisionen am LHC bei einer Schwerpunktsenergie von 13 TeV vorgestellt. Der Datensatz der in dieser Analyse verwendet wird, wurde durch das CMS Experiment am CERN LHC aufgezeichnet und entspricht einer integrierten Luminosität von 35.7 fb −1. Die W ± Bosonen werden durch das Vorhandensein eines Myons und eines Neutrinos im Endzustand identifiziert, wobei sich die Präsenz des Letztgenannten aus dem fehlenden Transversalimpuls innerhalb eines Events ableiten lässt. Charm-Quarks werden durch die vollständige Reconstruktion von D * (2010) ± Mesonen identifiziert, welche dem Zerfallskanal D * (2010) ± → D 0 + π ± → K ∓ +π ± +π ± folgen. Der Phasenraum dieser Messung ist durch den Transversalimpuls des Myons p µ T > 26 GeV, die Pseudorapidität des Myons |η µ | < 2.4 und den Transversalimpuls des Charm-Quarks p c T > 5 GeV bestimmt. Die Messung wird sowohl inclusiv, als auch differentiell, als eine Funktion der absoluten Pseudorapidität des Myons aus dem Zerfall des W ± Bosons, durchgeführt. Die Ergebnisse werden mit theoretischen Vorhersagen verglichen, bei denen verschiedene Sets an Parton-Verteilungsfunktionen, eng. parton distribution functions (PDF) verwendet werden. In einer anschließenden QCD-Analyse wird der Strange-Quark Anteil im Proton bestimmt und die Auswirkung der neuen Messung auf die Unsicherheiten der Partonverteilung untersucht. Die daraus resultierende Strange-Quark Verteilung des Protons wird mit jenen verglichen, die in globalen PDF Fits aus den Daten von Neutrino-Streuexperimenten bestimmt wurden.

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The CCFM uPDF evolution uPDFevolv Version 1.0.00

Abstract: uPDFevolvis an evolution code for TMD parton densities using the CCFM evolution equation. A description of the underlying theoretical model and technical realisation is given together with a detailed program description, with emphasis on parameters the user may want to change.

Cited by 78 publications

References 41 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

Hadron structure beyond collinear level and precision DIS measurements

Associated Production of W + Charm in 13 TeV Proton-Proton Collisions Measured with CMS and Determination of the Strange Quark Content of the Proton

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