Measurement of forward Z → e+e− production at s = 8 $$ \sqrt{s}=8 $$ TeV

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doi:10.1007/jhep05(2015)109

Cited by 42 publications

(13 citation statements)

References 28 publications

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“…III B). More specifically, we include the D0 data on the lepton asymmetry from the W -boson decays rather than the actual W -boson asymmetry data, as well as the recent LHC DY data [66][67][68][69][70][71][72]. In order to test the impact of such differences, we perform a variant of our fit in which we drop all the W, Z-boson collider data, replacing them with the D0 W -asymmetry data [108].…”

Section: Discussionmentioning

confidence: 99%

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Nuclear effects in the deuteron and constraints on the d/u ratio

2017

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We present a detailed study of nuclear corrections in the deuteron (D) by performing an analysis of data from deep inelastic scattering off proton and D, dilepton pair production in pp and pD interactions, and W ± and Z boson production in pp and pp collisions. In particular, we discuss the determination of the off-shell function describing the modification of the parton distribution functions in bound nucleons in the context of global QCD fits. Our results are consistent with the ones obtained independently from the study of data on deep inelastic scattering off heavy nuclei with mass number A ≥ 4, further confirming the universality of the off-shell function of the bound nucleon. We also study the sensitivity to the modeling of the deuteron wave function. As an important application we discuss the impact of nuclear corrections to the deuteron on the determination of the d quark distribution.

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Section: Discussionmentioning

confidence: 99%

“…The limitations of DIS data can be partially overcome with the addition of Drell-Yan, W ± , and Z production at Tevatron and the LHC [2,[64][65][66][67][68][69][70][71][72]. In particular, the data on W + and W − production allow a d/u separation independent from the deuterium data.…”

Section: B Data Samplesmentioning

confidence: 99%

Nuclear effects in the deuteron and constraints on the d/u ratio

2017

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“…The LHCb collaboration measured the cross section in 18 bins of Z boson rapidity in the di-muon decay channel [38]. They also measured 17 bins of Z boson rapidity in the e + e − decay channel [39]. Therefore, for this exercise we consider the optimization of the CT14HERA2 PDFs for these 35 observables.…”

Section: Examples Of Optimizing Using Epumpmentioning

confidence: 99%

Updating and optimizing error parton distribution function sets in the Hessian approach

2018

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We discuss how to apply the Hessian method (i) to predict the impact of a new data set (or sets) on the parton distribution functions (PDFs) and their errors, by producing an updated best-fit PDF and error PDF sets, such as the CTEQ-TEA PDFs; (ii) to predict directly the effect of a new data set on the PDF errors of any other set of observables, without the need to recalculate using the new error PDFs; and (iii) to transform the original set into a reduced set of error PDFs which is optimized for a specific set of observables to reproduce the PDF-induced uncertainties to any specified precision. We present a software package, ePump (error PDF Updating Method Package), that can be used to update or optimize a set of PDFs, including the best-fit PDF set and Hessian eigenvector pairs of PDF sets (i.e., error PDFs), and to update any other set of observables. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the Large Hadron Collider. Special care is given to discuss the assumptions made and the limitations of this theoretical framework compared to a treatment by the full global-analysis program.

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“…However, when Tevatron jet data are again included then we get an increase to α S (M 2 Z ) = 0.1173. We also consider the effect of adding in all of the newer W, Z data from ATLAS,CMS, LHCb and the Tevatron data [12,13,14,15,16,17,18] already considered in previous MMHT updates [11]. Including these data but not the LHC jet data we obtain α S (M 2 Z ) = 0.1180.…”

Section: α S Determinationmentioning

confidence: 99%