Constraints on nuclear parton distributions from dijet photoproduction at the LHC

Abstract

Using QCD calculations of the cross section of inclusive dijet photoproduction in Pb-Pb ultraperipheral collisions in the LHC kinematics as pseudo-data, we study the effect of including these data using the Bayesian reweighting technique on nCTEQ15, nCTEQ15np, and EPPS16 nuclear parton distribution functions (nPDFs). We find that, depending on the assumed error of the pseudo-data, it leads to a significant reduction of the nPDF uncertainties at small values of the momentum fraction $x_A$. Taking the error to be 5\%, the uncertainty of nCTEQ15 and nCTEQ15np nPDFs reduces approximately by a factor of two at $x_A=10^{-3}$. At the same time, the reweighting effect on EPPS16 nPDFs is much smaller due to the higher value of the tolerance and a more flexible parametrization form.

16 pages, 11 figures. Final published version

References in corpus (6)

• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• The Physics of Ultraperipheral Collisions at the LHC
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Nuclear Structure Functions at a Future Electron-Ion Collider
• Probing the small-$x$ nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC
• Top-quark production in proton-nucleus and nucleus-nucleus collisions at LHC energies and beyond

Cited by in corpus (13)

• The Large Hadron-Electron Collider at the HL-LHC
• Jets as precision probes in electron-nucleus collisions at the Electron-Ion Collider
• Impact of heavy quark and quarkonium data on nuclear gluon PDFs
• Nuclear suppression from coherent $J/\psi$ photoproduction at the Large Hadron Collider
• Towards a complete next-to-logarithmic description of forward exclusive diffractive dijet electroproduction at HERA: real corrections
• Measurement of photonuclear jet production in ultra-peripheral Pb+Pb collisions at $\sqrt{s_{\text{NN}}}=5.02$ TeV with the ATLAS detector
• How large is the diffractive contribution to inclusive dijet photoproduction in UPCs at the LHC?
• Diffractive dijet photoproduction at the EIC
• Next-to-leading order QCD predictions for dijet photoproduction in lepton-nucleus scattering at the future EIC and at possible LHeC, HE-LHeC, and FCC facilities
• Photoproductions of dileptons, photons, and light vector mesons in p-p, p-Pb, and Pb-Pb collisions at Large Hadron Collider energies
• Impact of scale, nuclear PDF and temperature variations on the interpretation of medium-modified jet production data from the LHC
• Single inclusive jet photoproduction at very forward rapidities in $pp$ and $pPb$ collisions at the LHC
• Impact of inclusive hadron production data on nuclear gluon PDFs