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

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 performed using data collected with the ATLAS detect...

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Detalhes bibliográficos
Autor principal: Onofre, A. (author)
Outros Autores: Castro, Nuno Filipe Silva Fernandes (author), ATLAS Collaboration (author)
Formato: article
Idioma:eng
Publicado em: 2017
Assuntos:
UPC
photoproduction
jets
nuclear parton distributions
Ciências Naturais::Ciências Físicas
Science & Technology
Texto completo:http://hdl.handle.net/1822/48923
País:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/48923
Descrição
Resumo: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 performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of . 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.

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