A1 Journal article (refereed)
Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV (2020)


ALICE collaboration (2020). Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2020 (6), 35. DOI: 10.1007/JHEP06(2020)035


JYU authors or editors


Publication details

All authors or editors: ALICE collaboration

Journal or series: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Publication year: 2020

Volume: 2020

Issue number: 6

Article number: 35

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: http://doi.org/10.1007/JHEP06(2020)035

Open Access: Publication published in an open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/70282

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2002.10897


Abstract

Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions of rapidity covering the range |y| < 0.8. For each rapidity interval, cross sections are shown for different nuclear-breakup classes defined according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on different models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/c2 and a width of about 140 MeV/c2 is reported and compared with similar observations from other experiments.


Keywords: particle physics

Free keywords: heavy ion experiments; heavy-ion collision; particle and resonance production


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2020


Last updated on 2020-28-10 at 08:54