Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at root s(NN)=2.76 TeV

ALICE Collaboration

Research output: Contribution to journalArticlepeer-review

187 Citations (Scopus)
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Abstract

The production of ${\rm\Xi}^-$ and ${\rm\Omega}^-$ baryons and their anti-particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV has been measured using the ALICE detector. The transverse momentum spectra at mid-rapidity ($|y| Krak${\o}$w and EPOS models give a satisfactory description of the data, with the latter covering a wider $p_{\rm T}$ range. Mid-rapidity yields, integrated over $p_{\rm T}$, have been determined. The hyperon-to-pion ratios are similar to those at RHIC: they rise smoothly with centrality up to $\langle N_{\rm part}\rangle$~150 and saturate thereafter. The enhancements (yields per participant nucleon relative to pp collisions) increase both with the strangeness content of the baryon and with centrality, but are less pronounced than at lower energies.
Original languageEnglish
Pages (from-to)216-227
Number of pages12
JournalPhysics Letters B
Volume728
Early online date26 Nov 2013
DOIs
Publication statusPublished - 20 Jan 2014

Bibliographical note

19 pages, 5 captioned figures, 1 table, authors from page 14, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/604

Keywords

  • nucl-ex
  • hep-ex

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