Progress in the CTEQ-TEA NNLO global QCD analysis

Hou, Tie‐Jiun; Xie, Keping; Gao, Jun; Dulat, Sayipjamal; Guzzi, Marco; Hobbs, T. J.; Huston, J.; Nadolsky, Pavel; Pumplin, Jon; Schmidt, Carl; Sitiwaldi, Ibrahim; Stump, Dan; Yuan, C. -P.

doi:10.48550/arxiv.1908.11394

Cited by 25 publications

(41 citation statements)

References 21 publications

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“…Ref. [46]. On the other hand, we do not expect this point to have a significant impact on the qualitative outcome of a mild sensitivity to the loop-order.…”

Section: Numerical Resultsmentioning

confidence: 64%

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Revisiting the proton mass decomposition

Metz,

Pasquini,

Rodini

2020

Preprint

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Different decompositions (sum rules) for the proton mass have been proposed in the literature.All of them are related to the energy-momentum tensor in quantum chromodynamics. We review and revisit these decompositions by paying special attention to recent developments with regard to the renormalization of the energy-momentum tensor. The connection between the sum rules is discussed as well. We present numerical results for the various terms of the mass decompositions up to 3 loops in the strong coupling, and consider their scheme dependence. We also elaborate on the role played by the trace anomaly and the sigma terms.

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“…Ref. [46]. On the other hand, we do not expect this point to have a significant impact on the qualitative outcome of a mild sensitivity to the loop-order.…”

Section: Numerical Resultsmentioning

confidence: 64%

“…Our numerical results are for the scale µ = 2 GeV. We take the parton momentum fractions from the CT18NNLO parameterization [46], which in the case of four active quark flavors gives a q = 0.586 ± 0.013 , a g = 1 − a q = 0.414 ± 0.013 .…”

Section: Numerical Resultsmentioning

confidence: 99%

Revisiting the proton mass decomposition

Metz,

Pasquini,

Rodini

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…6, compared with the existing data in the p T range up to about 6 -8 GeV and predictions extending up to p T = 20 GeV. The default predictions, using the CT18nlo set of parton distributions from [48,49] and the central member of the set I Ξ − + Ξ+ FFs turn out to be considerably smaller than the data, as expected.…”

Section: Ff Sets and Fit Qualitymentioning

confidence: 56%

Fragmentation Functions for $Ξ^-/\barΞ^+$ Using Neural Networks

Soleymaninia¹,

Hadi²,

Khanpour³

et al. 2022

Preprint

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We present a determination of fragmentation functions (FFs) for the octet baryon Ξ − / Ξ+ from data for single inclusive electron-positron annihilation. Our parametrization in this QCD analysis is provided in terms of a Neural Network (NN). We determine fragmentation functions for Ξ − / Ξ+ at next-to-leading order and for the first time at next-to-next-to-leading order in perturbative QCD. We discuss the improvement of higher-order QCD corrections, the quality of fit, and the comparison of our theoretical results with the fitted datasets. As an application of our new set of fragmentation functions, named SHKS22, we present predictions for Ξ − / Ξ+ baryon production in proton-proton collisions at the LHC experiments.

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“…Figure 3 shows PDF and scale uncertainties of the acceptance. The PDF uncertainties are evaluated using the CT18ANNLO set [29,30] scaled to 68% c.l. The scale uncertainties are estimated by varying factorization and renormalization scale by factor of two and taking the envelope of resulting acceptance factors.…”

Section: Resultsmentioning

confidence: 99%

Defiducialization: Providing Experimental Measurements for Accurate Fixed-Order Predictions

Glazov

2020

Preprint

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An experimental procedure is proposed to perform measurements of differential cross sections which can be compared to fixed-order QCD predictions with improved accuracy. The procedure can be applied to the Drell-Yan cross-section measurements which are differential in the boson transverse momentum. An example analysis is performed using the ATLAS measurement of the Z-boson production cross section at center-of-mass energy of 8 TeV. The resulting full phase space measurement of the cross section differential in the boson rapidity is compared to theoretical predictions computed with next-to-next-to leading-order accuracy in QCD.

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Progress in the CTEQ-TEA NNLO global QCD analysis

Cited by 25 publications

References 21 publications

Revisiting the proton mass decomposition

Revisiting the proton mass decomposition

Fragmentation Functions for $Ξ^-/\barΞ^+$ Using Neural Networks

Defiducialization: Providing Experimental Measurements for Accurate Fixed-Order Predictions

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