Threshold-improved predictions for charm production in deep-inelastic scattering

A. Vogt (Liverpool U.; Dept. Math.); H. Kawamura (Liverpool U.; N.A. Lo Presti; S. Moch (DESY; Zeuthen)

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Threshold-improved predictions for charm production in deep-inelastic scattering

N.A. Lo Presti, H. Kawamura (Liverpool U., Dept. Math.), S. Moch (DESY, Zeuthen), A. Vogt (Liverpool U.

High Energy Physics - Phenomenology · Submitted 5 Aug 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We have extended previous results on the threshold expansion of the gluon coefficient function for the charm contribution to the deep-inelastic structure function F_2 by deriving all threshold-enhanced contributions at the next-to-next-to-leading order.

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arXiv ID1008.0951 (version 1)

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CitationA. Vogt (Liverpool U., Dept. Math.), H. Kawamura (Liverpool U., N.A. Lo Presti, S. Moch (DESY, Zeuthen). "Threshold-improved predictions for charm production in deep-inelastic scattering." arXiv:1008.0951 (2010). https://pith.science/paper/D5IMAEFL

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We have extended previous results on the threshold expansion of the gluon coefficient function for the charm contribution to the deep-inelastic structure function F_2 by deriving all threshold-enhanced contributions at the next-to-next-to-leading order. The size of these corrections is briefly illustrated, and a first step towards extending this improvement to more differential charm-production cross sections is presented.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We have extended previous results on the threshold expansion of the gluon coefficient function for the charm contribution to the deep-inelastic structure function F_2 by deriving all threshold-enhanced contributions at the next-to-next-to-leading order.	contribution 0.99	0.96	0.52	asserted 1.00
s1	The size of these corrections is briefly illustrated, and a first step towards extending this improvement to more differential charm-production cross sections is presented.	future work 0.76	0.88	0.24	asserted 0.97

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The paper

Original abstract

We have extended previous results on the threshold expansion of the gluon coefficient function for the charm contribution to the deep-inelastic structure function F_2 by deriving all threshold-enhanced contributions at the next-to-next-to-leading order. The size of these corrections is briefly illustrated, and a first step towards extending this improvement to more differential charm-production cross sections is presented.

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References

Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

On the next-to-next-to-leading order QCD corrections to heavy-quark production in deep-inelastic scattering
hep-ph 2012-05 conditional novelty 7.0 of 10

New NNLO threshold and small-x logarithms plus high-scale matching are combined into approximate heavy-quark DIS coefficient functions whose uncertainty is large only below x about 10^-3.
Effect of changes of variable flavor number scheme on parton distribution functions and predicted cross sections
hep-ph 2012-01 conditional novelty 6.0 of 10

Varying the heavy-flavour scheme definition inside a global PDF fit shifts NLO parton distributions and LHC cross sections by 2-3%, but the shift falls below 1% at NNLO.
Heavy-quark deep-inelastic scattering with a running mass
hep-ph 2010-11 conditional novelty 6.0 of 10

Using the MS-bar running mass for charm and bottom quarks in deep-inelastic scattering improves perturbative stability and yields a charm mass m_c(m_c) = 1.01 +/- 0.09 (exp) +/- 0.03 (th) GeV from a global fit.
The ABM parton distributions tuned to LHC data
hep-ph 2013-10 conditional novelty 5.0 of 10

Adding LHC Drell-Yan and top-pair data to the ABM global fit leaves the strong coupling at 0.1132 and yields a top pole mass of 171.2 GeV, with PDF grids released for LHC use.
Parton distribution functions and benchmark cross sections at NNLO
hep-ph 2012-02 conditional novelty 5.0 of 10

A next-to-next-to-leading-order QCD fit to world deep-inelastic and Drell-Yan data yields a new parton distribution set (ABM11) and alpha_s(M_Z) = 0.1134 +/- 0.0011, notably below the world average.

Show 1 more citing papers

Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
hep-ph 2010-07 accept novelty 5.0 of 10

Varying the charm mass shifts LHC W, Z and Higgs cross sections by about 2 percent, the bottom mass barely matters, and 4-flavour PDFs give inclusive Z cross sections 2 to 4 percent below the 5-flavour ones.

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10 arXiv papers cite this in 20 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 16 sentences without a confident label

Uses its method or tool 2 papers

Our approximation NNLO$_approx$ in Eq. ([ref]) uses the threshold enhanced terms of Ref. [ref] to estimate the dominant corrections at two loops.

Heavy-quark deep-inelastic scattering with a running mass · Heavy-quark DIS in perturbative QCD · 0.95
([ref]) using the approximate NNLO QCD predictions of [ref] .

Parton distribution functions and benchmark cross sections at NNLO · Heavy-quark masses · 0.90

Compares with it 1 paper

For comparison, the ABM11 fit is based on the massive NNLO corrections stemming from the threshold resummation only [ref] and their uncertainty is not considered.

The ABM parton distributions tuned to LHC data · The HERA charm data · 0.95

Cites it as background 1 paper

where the perturbative coefficient functions $C_k, i$ are known to next-to-leading order (NLO) for CC [ref] and approximately to next-to-next-to-leading order (NNLO) for NC [ref] . $Q^2$ and $x$ are the usual DIS kinematical variables and $m$ is the heavy-quark (pole) mass.

Running heavy-quark masses in DIS · Introduction · 0.88

What it cites · 10 sentences without a confident label

Uses the method or tool of 3 papers

Following the methods of Refs. [ref] we find

Infrared singularities of QCD amplitudes with massive partons · Threshold resummation of the gluon coefficient function for $F_2^ c$ · 1.00
Following the methods of Refs. [ref] we find

Soft radiation in heavy-particle pair production: all-order colour structure and two-loop anomalous dimension · Threshold resummation of the gluon coefficient function for $F_2^ c$ · 1.00
The above $N$-space results can be readily expanded in $$ and then Mellin inverted using, e.g., App. A of Ref. [ref] and the fact that the leading-order coefficient function is linear in $β$ near threshold (we normalize the coefficient functions as in Refs. [ref] ),

Theoretical status and prospects for top-quark pair production at hadron colliders · Threshold approximation to the NNLO coefficient function · 0.99

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