Dijets in p+Pb collisions and their quantitative constraints for nuclear PDFs

Abstract

We present a perturbative QCD analysis concerning the production of high-pT dijets in p+Pb collisions at the LHC. The next-to-leading order corrections, scale variations and free-proton PDF uncertainties are found to have only a relatively small influence on the normalized dijet rapidity distributions. Interestingly, however, these novel observables prove to retain substantial sensitivity to the nuclear effects in the PDFs. Especially, they serve as a more robust probe of the nuclear gluon densities at $x>0.01$, than e.g. the inclusive hadron production. We confront our calculations with the recent data by the CMS collaboration. These preliminary data lend striking support to the gluon antishadowing similar to that in the EPS09 nuclear PDFs.

Transcription of the talk given in Quark Matter 2014 conference

References in corpus (4)

• New parton distributions for collider physics
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Centrality Dependence of pi^0 and eta Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions

Cited by in corpus (4)

• Nuclear Structure Functions at a Future Electron-Ion Collider
• Top-quark production in proton-nucleus and nucleus-nucleus collisions at LHC energies and beyond
• Neutron skin and centrality classification in high-energy heavy-ion collisions at the LHC
• An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: hard probes