Constraining nuclear Parton Density Functions with forward photon production at the LHC

Abstract

In this paper we explore the use of results on forward particle production at the LHC to constrain nuclear Parton Density Functions (nPDFs). The case study here is based on a possible future measurement of forward photon production with the Forward Calorimeter that is currently under discussion as an upgrade of the ALICE experiment. As a starting point, we use the recent nNNPDF 1.0 nuclear PDFs, which have been determined using fixed target neutral-current DIS data, which constrain the gluon density at x > $10^{-2}$. The Bayesian reweighting technique is used to include the constraints from the future measurement.

4 pages, 2 figures; preprint only

References in corpus (5)

• LHAPDF6: parton density access in the LHC precision era
• Parton distributions from high-precision collider data
• Reweighting NNPDFs: the W lepton asymmetry
• Precision determination of the small-$x$ gluon from charm production at LHCb
• Probing the small-$x$ nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC

Cited by in corpus (2)

• Design and Performance of a Silicon Tungsten Calorimeter Prototype Module and the Associated Readout
• Constraints of the Low-x Structure of Protons and Nuclei