This is not the latest version of this item. The latest version can be found here.
Observation of an Antimatter Hypernucleus
Name
1003.2030.pdf
Description
Accepted version
Size
1.15 MB
Format
Adobe PDF
Checksum (MD5)
f7616192675c8514fb6d6706d7b4dad9
Date Issued
2010
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Abelev, B. I., et al. "Observation of an Antimatter Hypernucleus." Science 328 5974 (2010): 58-62.
Version
Author's final manuscript
Abstract
Nuclear collisions recreate conditions in the universe microseconds after the Big Bang. Only a very small fraction of the emitted fragments are light nuclei, but these states are of fundamental interest. We report the observation of antihypertritons comprising an antiproton, an antineutron, and an antilambda hyperon produced by colliding gold nuclei at high energy. Our analysis yields 70-£17 antihypertritons (3/ΛH̄) and 157 ± 30 hypertritons (3/ΛH̄ The measured yields of 3/ΛH (3/ΛH) and 3He (3He) are similar, suggesting an equilibrium in coordinate and momentum space populations of up, down, and strange quarks and antiquarks, unlike the pattern observed at lower collision energies. The production and properties of antinuclei, and of nuclei containing strange quarks, have implications spanning nuclear and particle physics, astrophysics, and cosmology.
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
10.1126/science.1183980
