Leading twist nuclear shadowing phenomena in hard processes with nuclei

Frankfurt, L.; Guzey, V.; Strikman, M.

doi:10.1016/j.physrep.2011.12.002

Cited by 195 publications

(282 citation statements)

References 256 publications

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“…The spatially dependent EPS09 and EKS98 nPDF sets, EPS09s and EKS98s, are formulated as a function of the nuclear thickness [56]. The leading twist nuclear shadowing calculation [60] assumes the GlauberGribov approach of the collision geometry and predicts the dependence of the nPDF on the collision impact parameter. The estimates of the initial-state k T broadening due to multiple soft collisions also consider a dependence on the collision impact parameter [46,47].…”

Section: Jhep08(2016)078mentioning

confidence: 99%

Measurement of D-meson production versus multiplicity in p-Pb collisions at s N N = 5.02 $$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02 $$ TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

J. High Energ. Phys.

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Abstract:The measurement of prompt D-meson production as a function of multiplicity in p-Pb collisions at √ s NN = 5.02 TeV with the ALICE detector at the LHC is reported. D 0 , D + and D * + mesons are reconstructed via their hadronic decay channels in the centre-of-mass rapidity range −0.96 < y cms < 0.04 and transverse momentum interval 1 < p T < 24 GeV/c. The multiplicity dependence of D-meson production is examined by either comparing yields in p-Pb collisions in different event classes, selected based on the multiplicity of produced particles or zero-degree energy, with those in pp collisions, scaled by the number of binary nucleon-nucleon collisions (nuclear modification factor); as well as by evaluating the per-event yields in p-Pb collisions in different multiplicity intervals normalised to the multiplicity-integrated ones (relative yields). The nuclear modification factors for D 0 , D + and D * + are consistent with one another. The D-meson nuclear modification factors as a function of the zero-degree energy are consistent with unity within uncertainties in the measured p T regions and event classes. The relative D-meson yields, calculated in various p T intervals, increase as a function of the charged-particle multiplicity. The results are compared with the equivalent pp measurements at √ s = 7 TeV as well as with EPOS 3 calculations.

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Section: Jhep08(2016)078mentioning

confidence: 99%

Measurement of D-meson production versus multiplicity in p-Pb collisions at s N N = 5.02 $$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02 $$ TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

J. High Energ. Phys.

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“…As this constrains only the spatially averaged modification, we need to make an assumption about the spatial dependence. Motivated by the small-x shadowing studies [6], we assume that the nuclear modification is related to the nuclear thickness function T A (s) and choose a power series form…”

Section: Frameworkmentioning

confidence: 99%

EPS09s and EKS98s: Impact parameter dependent nPDF sets

et al. 2013

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In our recent study we have determined two new spatially dependent nuclear PDF (nPDF) sets, EPS09s and EKS98s. With these, the hard-process cross-sections can be calculated in different centrality classes consistently with the globally analyzed nPDFs for the first time. The sets were determined by exploiting the A-systematics of the globally fitted nPDF sets, EPS09 and EKS98. For the spatial dependence of the nPDFs we used a power series ansatz in the nuclear thickness function T A . In this flash talk we introduce the framework, and present our NLO EPS09s-based predictions for the nuclear modification factor in four centrality classes for inclusive neutral pion production in p+Pb collisions at the LHC and for inclusive prompt photon production in d+Au collisions at RHIC at midrapidity.

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“…where f D(4) b/A is the diffractive PDF on a nucleus [56]; it a novel, yet unmeasured distribution. Note that the photon flux f γ/p (y) in eq.…”

Section: Jhep04(2016)158mentioning

confidence: 99%

“…eq. (2.10), the diffractive PDFs of a nucleus after integration over the momentum transfer t scale only as A 4/3 in the impulse approximation; they are also further suppressed by nuclear shadowing [56]. Therefore, pA UPCs can be used to primarily study diffractive photoproduction of dijets on the proton by taking advantage of the dramatically enhanced intensity of the photon flux compared to pp UPCs.…”

Section: Jhep04(2016)158mentioning

confidence: 99%

“…(2.4) of diffractive PDFs into the product of the "Pomeron" flux and PDFs of the "Pomeron". Predictions for R b (x P , z P , µ 2 ) [56] for sea quarks for the representative ranges of z P and x P and at µ 2 = 400 GeV 2 are shown in figure 7. An analysis reveals that R b (x P , z P , µ 2 ) very weakly depends on the parton flavor b, the scale µ, z P and x P (the latter is seen from figure 7).…”

Section: Nuclear Diffractive Pdfsmentioning

confidence: 99%

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Diffractive dijet photoproduction in ultraperipheral collisions at the LHC in next-to-leading order QCD

Guzey

Klasen

2016

J. High Energ. Phys.

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Abstract:We make predictions for the cross sections of diffractive dijet photoproduction in pp, pA and AA ultraperipheral collisions (UPCs) at the LHC during Runs 1 and 2 using next-to-leading perturbative QCD. We find that the resulting cross sections are sufficiently large and, compared to lepton-proton scattering at HERA, have an enhanced sensitivity to small observed momentum fractions in the diffractive exchange, commonly denoted z jets P , and an unprecedented reach in the invariant mass of the photon-nucleon system W . We examine two competing schemes of diffractive QCD factorization breaking, which assume either a global suppression factor or a suppression for resolved photons only and demonstrate that the two scenarios can be distinguished by the nuclear dependence of the distributions in the observed parton momentum fraction in the photon x jets γ .

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Leading twist nuclear shadowing phenomena in hard processes with nuclei

Cited by 195 publications

References 256 publications

Measurement of D-meson production versus multiplicity in p-Pb collisions at s N N = 5.02 $$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02 $$ TeV

Measurement of D-meson production versus multiplicity in p-Pb collisions at s N N = 5.02 $$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02 $$ TeV

EPS09s and EKS98s: Impact parameter dependent nPDF sets

Diffractive dijet photoproduction in ultraperipheral collisions at the LHC in next-to-leading order QCD

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