Constraining nPDFs with inclusive pions and direct photons at forward rapidities in p+Pb collisions at the LHC

Abstract

In this talk, we present NLO pQCD predictions for inclusive pion and direct photon nuclear modifications in p+Pb collisions at mid- and forward rapidities at the LHC. In addition to the minimum bias predictions, we also address the centrality dependence with spatially dependent nuclear PDFs. To understand which regions of the nuclear momentum fraction $x_2$ these observables predominantly probe, we present also the underlying $x_2$ distributions at different rapidities. We are led to conclude that the isolated photons at forward rapidities are more sensitive to the small-$x_2$ dynamics than the inclusive pions.

4 pages, 5 figures. Prepared for the Proceedings of "Hard Probes 2013", the 6th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Stellenbosch, South Africa, November 4-8, 2013

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• Implications of CTEQ global analysis for collider observables
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• A new critical study of photon production in hadronic collisions
• Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data
• Nuclear PDFs in the beginning of the LHC era

Cited by in corpus (1)

• Theory @ Hard Probes 2013