Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at √sNN = 5.02 TeV.
Journal article
Authors | ALICE Collaboration and Barnby, Lee |
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Abstract | The production of Z0 bosons at large rapidities in Pb–Pb collisions at √sNN = 5.02 TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0 → μ+ μ−), based on muons selected with pseudo-rapidity −4.0 < η < −2.5 and pT > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of RAA for the 0–20% central Pb–Pb collisions is 0.67 ± 0.11 (stat.) ± 0.03 (syst.) ± 0.06 (corr. syst.), exhibiting a deviation of 2.6σ from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3σ in the 0–90% centrality class and by 3σ in the 0–20% central collisions. |
The production of Z0 bosons at large rapidities in Pb–Pb collisions at √sNN = 5.02 TeV is reported. | |
Keywords | Nuclear reactions; Particle physics; Proton-lead collisions; Protons |
Year | 2018 |
Journal | Physics Letters B |
Publisher | Elsevier |
ISSN | 03702693 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.physletb.2018.03.010 |
Web address (URL) | http://hdl.handle.net/10545/622478 |
hdl:10545/622478 | |
Publication dates | 06 Mar 2018 |
Publication process dates | |
Deposited | 29 Mar 2018, 13:54 |
Contributors | STFC Daresbury Laboratory |
File | File Access Level Open |
https://repository.derby.ac.uk/item/94qv5/measurement-of-z0-boson-production-at-large-rapidities-in-pb-pb-collisions-at-snn-5-02-tev
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