Szczegóły publikacji
Opis bibliograficzny
$W^{\pm}$ - boson production in p–Pb collisions at $\sqrt{s_{NN}}$=8.16 TeV and Pb–Pb collisions at $\sqrt{s_{NN}}$=5.02 TeV / S. Acharya, [et al.], B. BALIŚ, [et al.], M. GORGOŃ, [et al.], A. HORZYK, [et al.], M. JABŁOŃSKI, [et al.], J. P. KITOWSKI, [et al.], S. D. KORYCIAK, [et al.], P. G. RUSSEK, [et al.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479. — 2023 — iss. 5 art. no. 036, s. [1], 1-43. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 31-35, Abstr. — Publikacja dostępna online od: 2023-05-05
Autorzy (1031)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 146764 |
|---|---|
| Data dodania do BaDAP | 2023-05-30 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP05(2023)036 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
The production of the W± bosons measured in p–Pb collisions at a centre-of-mass energy per nucleon–nucleon collision sNN−−−√ = 8.16 TeV and Pb–Pb collisions at sNN−−−√ = 5.02 TeV with ALICE at the LHC is presented. The W± bosons are measured via their muonic decay channel, with the muon reconstructed in the pseudorapidity region −4 < ημlab < −2.5 with transverse momentum pμT > 10 GeV/c. While in Pb–Pb collisions the measurements are performed in the forward (2.5 < yμcms < 4) rapidity region, in p–Pb collisions, where the centre-of-mass frame is boosted with respect to the laboratory frame, the measurements are performed in the backward (−4.46 < yμcms < −2.96) and forward (2.03 < yμcms < 3.53) rapidity regions. The W− and W+ production cross sections, lepton-charge asymmetry, and nuclear modification factors are evaluated as a function of the muon rapidity. In order to study the production as a function of the p–Pb collision centrality, the production cross sections of the W− and W+ bosons are combined and normalised to the average number of binary nucleon–nucleon collision 〈Ncoll〉. In Pb–Pb collisions, the same measurements are presented as a function of the collision centrality. Study of the binary scaling of the W±-boson cross sections in p–Pb and Pb–Pb collisions is also reported. The results are compared with perturbative QCD calculations, with and without nuclear modifications of the Parton Distribution Functions (PDFs), as well as with available data at the LHC. Significant deviations from the theory expectations are found in the two collision systems, indicating that the measurements can provide additional constraints for the determination of nuclear PDFs and in particular of the light-quark distributions.
