The new ABM16 PDFs

Alekhin, S.; Placakyte, Rengaile; Bluemlein, Johannes; Moch, S.

doi:10.22323/1.265.0016

Cited by 19 publications

(19 citation statements)

References 16 publications

(28 reference statements)

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“…5. Predictions obtained with the NNPDF3.0 are compared to predictions using the PDF sets MMHT [111], CT14 [112], HERA-PDF2.0 [113] and ABMP16 [114]. All PDF sets shown are obtained in NNLO precision 5 with a value for the strong cou- 5 Since the NNLO predictions for the jet cross sections could not be obtained with varying NNLO PDFs, the PDFs are convoluted with NLO matrix elements for this study.…”

Section: Qcd Calculationsmentioning

confidence: 99%

Measurement of jet production cross sections in deep-inelastic ep scattering at HERA

et al. 2017

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A precision measurement of jet cross sections in neutral current deep-inelastic scattering for photon virtualities 5.5 < Q 2 < 80 GeV 2 and inelasticities 0.2 < y < 0.6 is presented, using data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 290 pb −1 . Double-differential inclusive jet, dijet and trijet cross sections are measured simultaneously and are presented as a function of jet transverse momentum observables and as a function of Q 2 . Jet cross sections normalised to the inclusive neutral current DIS cross section in the respective Q 2 -interval are also determined. Previous results of inclusive jet cross sections in the range 150 < Q 2 < 15,000 GeV 2 are extended to low transverse jet momenta 5 < P The data are compared to predictions from perturbative QCD in next-to-leading order in the strong coupling, in approximate next-to-next-to-leading order and in full next-to-nextto-leading order. Using also the recently published H1 jet data at high values of Q 2 , the strong coupling constant α s (M Z ) is determined in next-to-leading order.

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Section: Qcd Calculationsmentioning

confidence: 99%

Measurement of jet production cross sections in deep-inelastic ep scattering at HERA

et al. 2017

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“…For simplicity, we obtained these bands using the LO matrix elements and the NNLO PDFs, and we verified that quantitatively similar central values of the bands are obtained if we use NLO matrix elements. Since the PDF induced uncertainty is much larger than the theoretical uncertainty of its NNLO prediction, the charge ratio can be used reliably to further discriminate among and constrain the PDFs, provided that experimental uncertainties can be controlled to the same level, as is also pointed out in [24,58,59]. This charge ratio may also be sensitive to certain kinds of physics beyond the SM [60].…”

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confidence: 98%

NNLO QCD corrections tot-channel single top quark production and decay

et al. 2016

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We present a fully differential next-to-next-to-leading order calculation of t-channel single top-quark production and decay at the LHC under narrow-width approximation and neglecting cross-talk between incoming protons. We focus on the fiducial cross sections at 13 TeV, finding that the next-to-next-to-leading order QCD corrections can reach the level of −6%. The scale variations are reduced to the level of a percent. Our results can be used to improve experimental acceptance estimates and the measurements of the single top-quark production cross section and the top-quark electroweak couplings.Introduction. The top quark can be produced singly at a hadron collider through the electroweak (EW) W tb vertex. There are three production channels: the t-channel and s-channel processes through exchange of a W boson, and associated production of tW . All three channels are sensitive to the structure of the W tb vertex and to the CKM matrix element V tb , an important motivation for their study. Moreover, single top production provides an important window to physics beyond the standard model (SM) [1], e.g., a modified W tb vertex, new heavy quarks, new gauge bosons, flavor-changing neutral current, and so forth. Single top-quark production was first established at the Fermilab Tevatron [2,3], and later at the Large Hadron Collider (LHC) [4][5][6][7]. Single top-quark studies are expected to enter an era of high precision during the upcoming run of the LHC at higher energy and larger luminosity.The t-channel production has the largest rate among the three at the LHC, about 210 pb at √ s = 13 TeV. Significant efforts to improve the theoretical description of this process include next-to-leading order (NLO) QCD corrections in both 4-and 5-flavor schemes in Refs. [8][9][10][11][12][13][14][15][16]. Soft gluon resummation has been considered in Refs. [17][18][19][20]. Matching NLO calculations to parton showers is done in Refs. [21][22][23]. Recently, next-to-nextto-leading order (NNLO) QCD corrections with a stable top quark were calculated in Ref. [24], neglecting certain subleading contributions in color.In this manuscript we present the first fully differential NNLO calculation of t-channel single top quark production and decay at the LHC in the 5-flavor scheme in QCD. We follow Ref. [24] in neglecting cross-talk between the hadronic systems of the two incoming protons. To the best of our knowledge, our calculation is the first to combine QCD corrections at NNLO for production and decay, meaning that a realistic simulation at NNLO is now

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“…The corresponding nuclear effect is illustrated in the lower panels of figure 4, in which we show the ratio of the result of the full calculation to that without nuclear corrections. In this study we use the ABMP15NNLO proton PDFs of [57]. For comparison we also show the results obtained with CT10NLO proton PDFs [58] with phenomenological nuclear corrections of [4].…”

Section: Production Of W ± and Z Bosons In P+pb Collisions At Lhcmentioning

confidence: 99%

Nuclear parton distributions

Kulagin

2017

EPJ Web Conf.

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Abstract. We review a microscopic model of the nuclear parton distribution functions, which accounts for a number of nuclear effects including Fermi motion and nuclear binding, nuclear meson-exchange currents, off-shell corrections to bound nucleon distributions and nuclear shadowing. We also discuss applications of this model to a number of processes including lepton-nucleus deep inelastic scattering, proton-nucleus Drell-Yan lepton pair production at Fermilab, as well as W ± and Z 0 boson production in proton-lead collisions at the LHC.

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The new ABM16 PDFs

Cited by 19 publications

References 16 publications

Measurement of jet production cross sections in deep-inelastic ep scattering at HERA

Measurement of jet production cross sections in deep-inelastic ep scattering at HERA

NNLO QCD corrections tot-channel single top quark production and decay

Nuclear parton distributions

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