The contributions to the gluonic massive operator matrix elements

Blümlein, J.; Hasselhuhn, A.; Klein, Sebastian; Schneider, Carsten

doi:10.1016/j.nuclphysb.2012.09.001

Cited by 72 publications

(97 citation statements)

References 60 publications

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“…1 The mass of the s-quark is neglected, the final state c-quark is heavy and the coupling 1 At higher orders also cc pair production contributes [5,7].…”

Section: B Improved Treatment Of the Massive Charged-current Nnlo Comentioning

confidence: 99%

“…[5][6][7]. The former results have been derived for heavy-quark masses in the on-shell renormalization.…”

Section: B Improved Treatment Of the Massive Charged-current Nnlo Comentioning

confidence: 99%

“…[8] in different bins of the momentum transfer Q 2 (squares: positron beam; circles: electron beam). The dashes display the impact of the NNLO corrections to the CC massive Wilson coefficients [5][6][7] derived with the MS c-quark mass definition on the e þ -initiated CC cross sections. 3 Main heavy-quark CC DIS corrections to NNLO [5][6][7] used in our analysis are included into version 2.0 of the OPEN-QCDRAD code and are publicly available online [34].…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…The code of Ref. [7] including all Wilson coefficients is available on request to Johannes.Bluemlein@desy.de.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…Furthermore, improved theoretical descriptions in perturbative QCD for some of the underlying hard scattering reactions have become available. Specifically, the perturbative QCD corrections at next-to-next-to-leading order (NNLO) in QCD for charm quark production in CC DIS can be applied, which describe the heavy-quark coefficient functions at asymptotic values of Q 2 ≫ m 2 h [5][6][7], where m h is the mass of heavy quark, c or b. With the Wilson coefficients in this asymptotic regime it becomes possible to include consistently HERA cross-section measurements for CC inclusive DIS [8] at NNLO QCD into the analysis.…”

Section: Introductionmentioning

confidence: 99%

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Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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We present an improved determination of the strange sea distribution in the nucleon with constraints coming from the recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA. We demonstrate that the results are consistent with the data from the ATLAS and the CMS experiments on the associated production of W AE -bosons with c-quarks. We also discuss issues related to the recent strange sea determination by the ATLAS experiment using LHC collider data.

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“…1 The mass of the s-quark is neglected, the final state c-quark is heavy and the coupling 1 At higher orders also cc pair production contributes [5,7].…”

Section: B Improved Treatment Of the Massive Charged-current Nnlo Comentioning

confidence: 99%

“…[5][6][7]. The former results have been derived for heavy-quark masses in the on-shell renormalization.…”

Section: B Improved Treatment Of the Massive Charged-current Nnlo Comentioning

confidence: 99%

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…The code of Ref. [7] including all Wilson coefficients is available on request to Johannes.Bluemlein@desy.de.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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Fast Algorithms for Refined Parameterized Telescoping in Difference Fields

Schneider

2015

Lecture Notes in Computer Science

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Parameterized telescoping (including telescoping and creative telescoping) and refined versions of it play a central role in the research area of symbolic summation. In 1981 Karr introduced Π Σ -fields, a general class of difference fields, that enables one to consider this problem for indefinite nested sums and products covering as special cases, e.g., the (q-)hypergeometric case and their mixed versions. This survey article presents the available algorithms in the framework of Π Σ -extensions and elaborates new results concerning efficiency.

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Simplifying Multiple Sums in Difference Fields

Schneider

2013

Texts &Amp; Monographs in Symbolic Computation

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In this survey article we present difference field algorithms for symbolic summation. Special emphasize is put on new aspects in how the summation problems are rephrased in terms of difference fields, how the problems are solved there, and how the derived results in the given difference field can be reinterpreted as solutions of the input problem. The algorithms are illustrated with the Mathematica package Sigma by discovering and proving new harmonic number identities extending those from (Paule and Schneider, 2003). In addition, the newly developed package EvaluateMultiSums is introduced that combines the presented tools. In this way, large scale summation problems for the evaluation of Feynman diagrams in QCD (Quantum ChromoDynamics) can be solved completely automatically.

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The contributions to the gluonic massive operator matrix elements

Cited by 72 publications

References 60 publications

Determination of strange sea quark distributions from fixed-target and collider data

Determination of strange sea quark distributions from fixed-target and collider data

Fast Algorithms for Refined Parameterized Telescoping in Difference Fields

Simplifying Multiple Sums in Difference Fields

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