A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Measurement of nuclear effects on ψ(2S) production in p-Pb collisions at √sNN = 8.16 TeV (2020)

ALICE Collaboration. (2020). Measurement of nuclear effects on ψ(2S) production in p-Pb collisions at √sNN = 8.16 TeV. Journal of High Energy Physics, 2020(7), Article 237. https://doi.org/10.1007/JHEP07(2020)237

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration

Lehti tai sarja: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Julkaisuvuosi: 2020

Volyymi: 2020

Lehden numero: 7

Artikkelinumero: 237

Kustantaja: Springer Science and Business Media LLC

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1007/JHEP07(2020)237

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/71331

Rinnakkaistallenteen verkko-osoite (pre-print): http://arxiv.org/abs/2003.06053

Tiivistelmä

Inclusive ψ(2S) production is measured in p-Pb collisions at the centre-ofmass energy per nucleon-nucleon pair √sNN = 8.16 TeV, using the ALICE detector at the CERN LHC. The production of ψ(2S) is studied at forward (2.03 < ycms < 3.53) and backward (−4.46 < ycms < −2.96) centre-of-mass rapidity and for transverse momentum pT < 12 GeV/c via the decay to muon pairs. In this paper, we report the integrated as well as the ycms- and pT-differential inclusive production cross sections. Nuclear effects on ψ(2S) production are studied via the determination of the nuclear modification factor that shows a strong suppression at both forward and backward centre-of-mass rapidities. Comparisons with corresponding results for inclusive J/ψ show a similar suppression for the two states at forward rapidity (p-going direction), but a stronger suppression for ψ(2S) at backward rapidity (Pb-going direction). As a function of pT, no clear dependence of the nuclear modification factor is found. The relative size of nuclear effects on ψ(2S) production compared to J/ψ is also studied via the double ratio of production cross sections [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and pp collisions. The results are compared with theoretical models that include various effects related to the initial and final state of the collision system and also with previous measurements at √sNN = 5.02 TeV.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 2