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K∗(892)0 and φ(1020) meson production at high transverse momentum in pp and Pb-Pb collisions at √ sNN = 2.76 TeV
dc.contributor.author | Adam, Jaroslav | pt_BR |
dc.contributor.author | Gay Ducati, Maria Beatriz | pt_BR |
dc.contributor.author | Pereira, Luis Gustavo | pt_BR |
dc.contributor.author | Pezzi, Rafael Peretti | pt_BR |
dc.contributor.author | ALICE Collaboration | pt_BR |
dc.date.accessioned | 2017-09-28T02:28:02Z | pt_BR |
dc.date.issued | 2017 | pt_BR |
dc.identifier.issn | 0556-2813 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/168985 | pt_BR |
dc.description.abstract | The production of K (892)0 and φ(1020) mesons in proton-proton (pp) and lead-lead (Pb-Pb) collisions at √ sNN = 2.76 TeV has been analyzed using a high luminosity data sample accumulated in 2011 with the ALICE detector at the Large Hadron Collider (LHC). Transverse momentum (pT) spectra have been measured for K (892)0 and φ(1020) mesons via their hadronic decay channels for pT up to 20 GeV/c. The measurements in pp collisions have been compared to model calculations and used to determine the nuclear modification factor and particle ratios. The K (892)0/K ratio exhibits significant reduction from pp to central Pb-Pb collisions, consistent with the suppression of the K (892)0 yield at low pT due to rescattering of its decay products in the hadronic phase. In central Pb-Pb collisions the pT dependent φ(1020)/π and K (892)0/π ratios show an enhancement over pp collisions for pT ≈ 3 GeV/c, consistent with previous observations of strong radial flow. At high pT, particle ratios in Pb-Pb collisions are similar to those measured in pp collisions. In central Pb-Pb collisions, the production of K (892)0 and φ(1020) mesons is suppressed for pT > 8 GeV/c. This suppression is similar to that of charged pions, kaons, and protons, indicating that the suppression does not depend on particle mass or flavor in the light quark sector. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. C, Nuclear physics. Melville. Vol. 95, no. 6 (June 2017), 064606, 18 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Colisao de ions pesados | pt_BR |
dc.subject | Aceleradores de partículas | pt_BR |
dc.subject | Producao de mesons | pt_BR |
dc.title | K∗(892)0 and φ(1020) meson production at high transverse momentum in pp and Pb-Pb collisions at √ sNN = 2.76 TeV | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001027439 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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