Mid-rapidity $\Lambda $ and $\bar{\Lambda}$ Production in Au+Au Collisions at $\sqrt{s_{_{NN}}}=130$ GeV

We report the first measurement of strange ($\Lambda$) and anti-strange ($\bar{\Lambda}$) baryon production from $\sqrt{s_{_{NN}}}=130$ GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). Rapidity density and transverse mass distributions at mid-rapidity are presented as a function of centrality. The yield of $\Lambda$ and $\bar{\Lambda}$ hyperons is found to be approximately proportional to the number of negative hadrons. The production of $\bar{\Lambda}$ hyperons relative to negative hadrons increases very rapidly with transverse momentum. The magnitude of the increase cannot be described by existing hadronic string fragmentation models.

• Publication year

  2002

• Venue

  Physical Review Letters

• Publication date

  2002-03-22

• Fields of study

  Physics

• Identifiers
  DOI 10.1103/PhysRevLett.89.092301arXiv nucl-ex/0203016
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• [THE UNIVERSITY OF CALIFORNIA, LOS ANGELES].

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