A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic pp collisions at √sNN = 5.02 TeV (2020)


ALICE Collaboration (2020). Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic pp collisions at √sNN = 5.02 TeV. Physical Review C, 101 (4), 044907. DOI: 10.1103/PhysRevC.101.044907


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration

Lehti tai sarja: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Julkaisuvuosi: 2020

Volyymi: 101

Lehden numero: 4

Artikkelinumero: 044907

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevC.101.044907

Avoin saatavuus: Hybridijulkaisukanavassa ilmestynyt avoin julkaisu

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/69262

Julkaisu on rinnakkaistallennettu: https://curis.ku.dk/portal/files/241481903/PhysRevC.101.044907.pdf

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/1910.07678


Tiivistelmä

Midrapidity production of pi(+/-), K-+/-, and (<(p))over bar>p measured by the ALICE experiment at the CERN Large Hadron Collider, in Pb-Pb and inelastic pp collisions at √s(NN) = 5.02 TeV, is presented. The invariant yields are measured over a wide transverse momentum (p(T)) range from hundreds of MeV/c up to 20 GeV/c. The results in Pb-Pb collisions are presented as a function of the collision centrality, in the range 0-90%. The comparison of the P-T -integrated particle ratios, i.e., proton-to-pion (p/pi) and kaon-to-pion (K/pi) ratios, with similar measurements in Pb-Pb collisions at √s(NN) = 2.76 TeV show no significant energy dependence. Blast-wave fits of the p(T) spectra indicate that in the most central collisions radial flow is slightly larger at 5.02 TeV with respect to 2.76 TeV. Particle ratios (p/pi, K/pi) as a function of p(T) show pronounced maxima at p(T) approximate to 3 GeV/c in central Pb-Pb collisions. At high p(T) , particle ratios at 5.02 TeV are similar to those measured in pp collisions at the same energy and in Pb-Pb collisions at √sNN = 2.76 TeV. Using the pp reference spectra measured at the same collision energy of 5.02 TeV, the nuclear modification factors for the different particle species are derived. Within uncertainties, the nuclear modification factor is particle species independent for high p(T) and compatible with measurements at √sNN = 2.76 TeV. The results are compared to state-of-the-art model calculations, which are found to describe the observed trends satisfactorily.


YSO-asiasanat: hiukkasfysiikka


Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointi: Kyllä

Raportointivuosi: 2020

Alustava JUFO-taso: 2


Viimeisin päivitys 2021-02-02 klo 09:56