Impact of new neutrino deep inelastic scattering and Drell-Yan data on large-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>x</mml:mi></mml:math>parton distributions

Owens, J.F.; Huston, J.; Keppel, C.; Kuhlmann, S.; Morfín, J. G.; Olness, Fred; Pumplin, Jon; Stump, Daniel R.

doi:10.1103/physrevd.75.054030

Cited by 45 publications

(47 citation statements)

References 26 publications

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“…The parameterization of the presented nCTEQ nuclear PDFs is the same as in our previous analyses [13,21,33]. It mimics the parameterization used in the free proton CTEQ fits [34][35][36], and takes the following form:…”

Section: A Parameterizationmentioning

confidence: 99%

“…The free proton PDFs are described by the coefficients c k,0 which in our analysis are fixed to values of the fit of Ref. [34] which is close to CTEQ6.1 [36] but has the advantage of having minimal influence from nuclear data. Although in principle this framework can be used to determine the strange quark content of the bound nucleon, there is not sufficient data available to reliably do that.…”

Section: A Parameterizationmentioning

confidence: 99%

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nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

Kovařı́k¹,

Kusina²,

Ježo³

et al. 2016

Phys. Rev. D

480

532

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We present the new nCTEQ15 set of nuclear parton distribution functions (nPDFs) with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to 208 Pb. The uncertainties are determined using the Hessian method with an optimal rescaling of the eigenvectors to accurately represent the uncertainties for the chosen tolerance criteria. In addition to the Deep Inelastic Scattering (DIS) and Drell-Yan (DY) processes, we also include inclusive pion production data from RHIC to help constrain the nuclear gluon PDF. Furthermore, we investigate the correlation of the data sets with specific nPDF flavor components, and asses the impact of individual experiments. We also provide comparisons of the nCTEQ15 set with recent fits from other groups.

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Section: A Parameterizationmentioning

confidence: 99%

Section: A Parameterizationmentioning

confidence: 99%

nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

Kovařı́k¹,

Kusina²,

Ježo³

et al. 2016

Phys. Rev. D

480

532

View full text Add to dashboard Cite

show abstract

“…A detailed study of these problems in the global analysis context, including effects of nuclear target corrections, has recently been performed in [25]. This open issue does not affect our study of the strange sector, since the strange distributions are insensitive to total inclusive cross sections, as demonstrated in sections 3 and 4.…”

Section: A Fixed Target Charged Current Dis Datamentioning

confidence: 99%

The strange parton distribution of the nucleon: global analysis and applications

Lai¹,

Nadolsky²,

Pumplin³

et al. 2007

J. High Energy Phys.

127

172

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The strange parton distribution of the nucleon: global analysis and applications The strange parton distribution of the nucleon: global analysis and applications Abstract: The strangeness degrees of freedom in the parton structure of the nucleon are explored in the global analysis framework, using the new CTEQ6.5 implementation of the general mass perturbative QCD formalism of Collins. We systematically determine the constraining power of available hard scattering experimental data on the magnitude and shape of the strange quark and anti-quark parton distributions. We find that current data favor a distinct shape of the strange sea compared to the isoscalar non-strange sea. A new reference parton distribution set, CTEQ6.5S0, and representative sets spanning the allowed ranges of magnitude and shape of the strange distributions, are presented. Some applications to physical processes of current interest in hadron collider phenomenology are discussed.

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“…In regard to NuTeV data, an early study in Ref. [105] found that these data could be accommodated together with the CHORUS neutrino DIS data when constraining d/u ratio but with the applied nuclear corrections some pull against other DIS and DY data were observed. Later on, the analyses in Refs.…”

Section: Neutrino Dis Datamentioning

confidence: 99%

Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO

2019

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We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino beams on nuclear targets. In addition, a set of proton baseline PDFs is fitted within the same framework with the same theoretical assumptions. The results of this global QCD analysis are compared to existing nPDF sets and to the fitted cross sections. Also, the uncertainties resulting from the limited constraining power of the included experimental data are presented. The published work is based on an open-source tool, xFitter, which has been modified to be applicable also for a nuclear PDF analysis. The required extensions of the code are discussed as well.

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Impact of new neutrino deep inelastic scattering and Drell-Yan data on large-xparton distributions

Cited by 45 publications

References 26 publications

nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

The strange parton distribution of the nucleon: global analysis and applications

Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO

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