Observation of the antimatter helium-4 nucleus at RHIC

Abstract

We present the observation of the \Heebar nucleus, the heaviest antinucleus observed to date. In total, 18 \Heebar counts were detected at the STAR experiment at RHIC in 10${}^9$ recorded Au+Au collisions at beam energies of $\sqrt{s_{NN}}$ = 200 GeV and 62 GeV. The background has been estimated, and the misidentification probability is found to be lower than 10${}^{-11}$.

4 pages, 3 figures, to appear as proceedings of QM2011 conference at Annecy, France

References in corpus (1)

• Observation of the antimatter helium-4 nucleus

Cited by in corpus (4)

• Antinuclei in Heavy-Ion Collisions
• Production of multistrange hadrons, light nuclei and hypertriton in central Au+Au collisions at $\sqrt{s_{NN}}=$ 11.5 and 200 GeV
• Phenomenological study of light (anti)nuclei, (anti)hypertriton and di-Lambda production at RHIC
• A brief review of antimatter production