A4 Artikkeli konferenssijulkaisussa
Probing nuclear PDFs with dijets in ultra-peripheral Pb+Pb collisions (2019)

Helenius, I. (2019). Probing nuclear PDFs with dijets in ultra-peripheral Pb+Pb collisions. In D. d'Enterria, A. Morsch, & P. Crochet (Eds.), Hard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Article 118). Sissa Medialab srl. POS Proceedings of Science, 345. https://doi.org/10.22323/1.345.0118

JYU-tekijät tai -toimittajat

Helenius, Ilkka

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Helenius, I.

Emojulkaisu: Hard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Emojulkaisun toimittajat: d'Enterria, David; Morsch, Andreas; Crochet, Philippe

Konferenssi:

Konferenssin paikka ja aika: Aix-les-Bains, France, 1.-5.10.2018

Lehti tai sarja: POS Proceedings of Science

eISSN: 1824-8039

Julkaisuvuosi: 2019

Sarjan numero: 345

Artikkelinumero: 118

Kustantaja: Sissa Medialab srl

Julkaisumaa: Italia

Julkaisun kieli: englanti

DOI: https://doi.org/10.22323/1.345.0118

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/65917

Julkaisu on rinnakkaistallennettu: https://arxiv.org/abs/1811.10931

Tiivistelmä

In this talk we apply the photoproduction framework recently implemented into the PYTHIA 8 Monte Carlo event generator to study the potential of photo-nuclear dijets in ultra-peripheral Pb+Pb collisions at the LHC to further constrain the nuclear PDFs. These events can be described as γA collisions where the relevant part of the flux of quasi-real photons from heavy-ions is obtained by using the equivalent photon approximation and cutting out impact-parameter values which would lead to hadronic interactions between the beam particles. In particular, we quantify the small-x reach with different jet kinematics and show how well the values of x derived from reconstructed jet momenta are correlated with the actual values of partonic momentum fractions probed in these measurements. Also the contributions from direct and resolved photons are separately presented. To demonstrate the potential, we compare the expected experimental uncertainties to the current nuclear-PDF errors and discuss other theoretical uncertainties including the uncertainty arising from poorly-constrained photon PDFs. We find that such a measurement would potentially provide a considerable reduction of the nuclear PDF uncertainties in a region 10−4 ≲ x ≲ 10−2.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

Raportointivuosi: 2019

JUFO-taso: 0