K$^{*}(892)^{0}$ and $\phi(1020)$ meson production at high transverse momentum in pp and Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}$ = 2.76 TeV - INSPIRE

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K $^{*}(892)^{0}$ and $\phi(1020)$ meson production at high transverse momentum in pp and Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}$ = 2.76 TeV

ALICE

Collaboration

Feb 2, 2017

18 pages

Published in:

Phys.Rev.C 95 (2017) 6, 064606

Published: Jun 12, 2017

e-Print:

1702.00555 [nucl-ex]

DOI:

10.1103/PhysRevC.95.064606

Report number:

CERN-EP-2017-010

Experiments:

CERN-LHC-ALICE

View in:

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Abstract: (APS)

The production of K*(892)0 and ϕ(1020) mesons in proton-proton (pp) and lead-lead (Pb-Pb) collisions at sNN=2.76TeV 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 20GeV/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≈3GeV/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>8GeV/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.

Note:

26 pages, 10 captioned figures, 3 tables, authors from page 21, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3363

K: production
K*(892)0: production
Phi(1020): production
meson: production
transverse momentum: high
luminosity: high
p p: scattering
heavy ion: scattering
suppression
CERN LHC Coll

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