Unbiased global determination of parton distributions and their uncertainties at NNLO and at LO

Collaboration, The NNPDF; Ball, Richard D.; Bertone, Valerio; Cerutti, F.; Debbio, Luigi Del; Forte, Stefano; Guffanti, A.; Latorre, José I.; Rojo, Juan; Ubiali, Maria

doi:10.48550/arxiv.1107.2652

Cited by 69 publications

(117 citation statements)

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“…The uncertainties from the factorization scale dependence of the signal events are estimated by changing the scale in the compensated MC events by 1/2 and 2. The errors from the PDF uncertainties are estimated using different sets of PDFs, MSTW2008 [27] and NNPDF2.1 [28], for the compensated events. The uncertainties associated with JES are estimated by varying the p T of all jets in events by ±10 % before the event selection cuts.…”

Section: Results Of Top Mass Reconstructionmentioning

confidence: 99%

Weight function method for precise determination of top quark mass at Large Hadron Collider

et al. 2015

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We propose a new method to measure a theoretically well-defined top quark mass at the LHC. This method is based on the "weight function method," which we proposed in our preceding paper. It requires only lepton energy distribution and is basically independent of the production process of the top quark. We perform a simulation analysis of the top quark mass reconstruction with tt pair production and lepton + jets decay channel at the leading order. The estimated statistical error of the top quark mass is about 0.4 GeV with an integrated luminosity of 100 fb −1 at √ s = 14 TeV. We also estimate some of the major systematic uncertainties and find that they are under good control.

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Section: Results Of Top Mass Reconstructionmentioning

confidence: 99%

Weight function method for precise determination of top quark mass at Large Hadron Collider

et al. 2015

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“…Five different NLO PDF sets are used: CT10 [6], MSTW2008 [7], NNPDF2.1 [8], GJR08 [9] and ABKM09 [10], as implemented in LHAPDF [11]. The renormalisation and factorisation scales are set to M W , although the cross-section ratios are rather insensitive to this choice.…”

Section: Cms Measurement Of σ(W + C)mentioning

confidence: 99%

Charm Production in Association with an Electroweak Gauge Boson at the LHC

Stirling

Vryonidou

2012

Phys. Rev. Lett.

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The production of charm quark jets in association with electroweak gauge bosons at the LHC can be used as a tool to constrain quark parton distribution functions (PDFs). Motivated by recent measurements at the Tevatron and LHC, we calculate cross sections for W/Z+c, comparing these to W/Z+jet, for various PDF sets. The cross-section differences can be understood in terms of the different underlying PDFs, with the strange quark distribution being particularly important for W+c production. We suggest measurements of appropriately defined ratios and comment on how these measurements at the LHC can be used to extract information on the strange and charm content of the proton at high Q(2) scales.

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“…The recent LHCb data on the Z → e + e − production were not included into the benchmarking of Ref. [24], however, they are compared with the NNLO predictions based on the CT10 [26], MSTW09 [7], and NN21 [27] PDFs in Fig. 4 of Ref.…”

mentioning

confidence: 99%

ABM11 PDFs and the cross section benchmarks in the NNLO

Alekhin¹,

Bluemlein²,

Moch³

2013

Proceedings of “Loops and Legs in Quantum Field Theory ” 11th DESY Workshop on Elementary Particle Physics — PoS(LL2012)

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We report an updated version of the ABKM09 NNLO PDF fit, which includes the most recent HERA collider data on the inclusive cross sections and an improved treatment of the heavy-quark contribution to deep-inelastic scattering using advantages of the running-mass definition for the heavy quarks. The ABM11 PDFs obtained from the updated fit are in a good agreement with the recent LHC data on the W -and Z-production within the experimental and PDF uncertainties. We also perform a determination of the strong coupling constant α s in a variant of the ABM11 fit insensitive to the influence of the higher twist terms and find the value of α s = 0.1133(11) which is in good agreement with the nominal ABM11 one and our earlier determination.

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Unbiased global determination of parton distributions and their uncertainties at NNLO and at LO

Cited by 69 publications

References 0 publications

Weight function method for precise determination of top quark mass at Large Hadron Collider

Weight function method for precise determination of top quark mass at Large Hadron Collider

Charm Production in Association with an Electroweak Gauge Boson at the LHC

ABM11 PDFs and the cross section benchmarks in the NNLO

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