Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K* (892) and ϕ(1020) mesons

Acharya, S.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Simatović, Goran; ...; Utrobičić, Antonija; ...; Vicković, Linda; ...; Zurlo, N.

doi:10.1016/j.physletb.2020.135225

Pregled bibliografske jedinice broj: 1054170

Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K* (892) and ϕ(1020) mesons

(ALICE Collaboration) Acharya, S.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ... et al.

Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K* (892) and ϕ(1020) mesons // Physics letters. B, 802 (2020), 135225, 14 doi:10.1016/j.physletb.2020.135225 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1054170 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K* (892) and ϕ(1020) mesons

Autori
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physics letters. B (0370-2693) 802 (2020); 135225, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pb-Pb, K* meson, ϕ(1020) mesons, rescattering effect

Sažetak
Measurements of K*(892)^0 and φ(1020)resonance production in Pb–Pb and pp collisions at √sNN=5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity (|y| <0.5) via their hadronic decay channels and the transverse momentum (pT) distributions are obtained for various collision centrality classes up to pT=20 GeV/c. The pT-integrated yield ratio K*(892)^0/K in Pb–Pb collisions shows significant suppression relative to pp collisions and decreases towards more central collisions. In contrast, the φ(1020)/K ratio does not show any suppression. Furthermore, the measured K* (892)^0/K ratio in central Pb–Pb collisions is significantly suppressed with respect to the expectations based on a thermal model calculation, while the φ(1020)/K ratio agrees with the model prediction. These measurements are an experimental demonstration of rescattering of K*(892)^0 decay products in the hadronic phase of the collisions. The K* (892)^0/K yield ratios in Pb–Pb and pp collisions are used to estimate the time duration between chemical and kinetic freeze- out, which is found to be ∼4–7 fm/cfor central collisions. The pT- differential ratios of K* (892)^0/K, φ(1020)/K, K*(892)^0/π, φ(1020)/ π, p/K*(892)^0and p/φ(1020)are also presented for Pb–Pb and pp collisions at √sNN=5.02 TeV. These ratios show that the rescattering effect is predominantly a low-pT phenomenon.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

Projekti:
HRZZ-IP-2018-01-4108 - Demistificiranje dvočestičnih korelacija u pp sudarima s nadograđenom komorom vremenske projekcije (TPCwithTPC) (Planinić, Mirko, HRZZ - 2018-01) ( CroRIS)

Ustanove:
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Filip Erhardt (autor)