Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS

A Angerami, Torsten Åkesson, Simona Bocchetta, Caterina Doglioni, Vincent Hedberg, Göran Jarlskog, Charles Kalderon, Else Lytken, Ulf Mjörnmark, Trine Poulsen, Oxana Smirnova, Oleksandr Viazlo, ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review


Ultra-peripheral heavy ion collisions provide a unique opportunity to study the parton distributions in the colliding nuclei via the measurement of photo-nuclear jet production. An analysis of jet production in ultra-peripheral Pb+Pb collisions at sNN=5.02 TeV performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of 0.38 nb−1. The ultra-peripheral collisions are selected using a combination of forward neutron and rapidity gap requirements. The cross-sections, not unfolded for detector response, are compared to results from Pythia Monte Carlo simulations re-weighted to match a photon spectrum obtained from the STARlight model. Qualitative agreement between data and these simulations is observed over a broad kinematic range suggesting that using these collisions to measure nuclear parton distributions is experimentally realisable. © 2017 The Author(s)
Original languageEnglish
Pages (from-to)277-280
JournalNuclear Physics A
Publication statusPublished - 2017

Subject classification (UKÄ)

  • Subatomic Physics


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