A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at √sNN = 8.16 TeV (2021)


ALICE collaboration. (2021). Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at √sNN = 8.16 TeV. Journal of High Energy Physics, 2021(2), Article 2. https://doi.org/10.1007/JHEP02(2021)002


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: 2021

Volyymi: 2021

Lehden numero: 2

Artikkelinumero: 2

Kustantaja: Springer

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1007/JHEP02(2021)002

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/74483

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2008.04806


Tiivistelmä

The inclusive production of the J/ψ and ψ(2S) charmonium states is studied as a function of centrality in p-Pb collisions at a centre-of-mass energy per nucleon pair sNN = 8.16 TeV at the LHC. The measurement is performed in the dimuon decay channel with the ALICE apparatus in the centre-of-mass rapidity intervals −4.46 < ycms< −2.96 (Pb-going direction) and 2.03 < ycms< 3.53 (p-going direction), down to zero transverse momentum (pT). The J/ψ and ψ(2S) production cross sections are evaluated as a function of the collision centrality, estimated through the energy deposited in the zero degree calorimeter located in the Pb-going direction. The pT-differential J/ψ production cross section is measured at backward and forward rapidity for several centrality classes, together with the corresponding average 〈pT〉 and 〈pT2〉 values. The nuclear effects affecting the production of both charmonium states are studied using the nuclear modification factor. In the p-going direction, a suppression of the production of both charmonium states is observed, which seems to increase from peripheral to central collisions. In the Pb-going direction, however, the centrality dependence is different for the two states: the nuclear modification factor of the J/ψ increases from below unity in peripheral collisions to above unity in central collisions, while for the ψ(2S) it stays below or consistent with unity for all centralities with no significant centrality dependence. The results are compared with measurements in p-Pb collisions at sNN = 5.02 TeV and no significant dependence on the energy of the collision is observed. Finally, the results are compared with theoretical models implementing various nuclear matter effects.


YSO-asiasanat: hiukkasfysiikka

Vapaat asiasanat: Hadron-Hadron scattering (experiments)


Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointi: Kyllä

Raportointivuosi: 2021

Alustava JUFO-taso: 2


Viimeisin päivitys 2021-20-09 klo 16:04