Hypernuclei

Nuclei that consist of protons, neutrons, and one or more strange particles such as lambda particles. The lambda particle is the lightest strange baryon (hyperon); its lifetime is 2.6 × 10^-10 s. Because strangeness is conserved in strong interactions, the lifetime of the lambda particle remains essentially unchanged in the nucleus also. Lambda hypernuclei live long enough to permit detailed study of their properties. See Baryon, Elementary particle, Hyperon, Nuclear structure, Strong nuclear interactions

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of the hypernuclei and formulas for the 4-body L = 0 states were derived by a straightforward extension of this formula.

2002) Faddeev Yakubovsky calculations for light [LAMBDA][LAMBDA] hypernuclei.

Strong binding and shrinkage of single and double [bar.K] nuclear systems ([K.sup.-]pp, [K.sup.-]ppn, [K.sup.-][K.sup.-]p and [K.sup.-][K.sup.-]pp) predicted by Faddeev-Yakubovsky calculations

Nuclei containing one or more strange quarks are called hypernuclei.

This study of the new antihypernucleus also yields a valuable sample of normal hypernuclei, and has implications for our understanding of the structure of collapsed stars.

Scientists discover most massive form of antimatter to date

Whereas ordinary nuclei contain protons and neutrons, so-called hypernuclei produced in an experiment at Brookhaven National Laboratory in Upton, N.

In the new hypernuclei experiment, a team of 50 scientists from six countries used a Brookhaven accelerator known as the Alternating Gradient Synchrotron to direct the world's most intense proton beam at a piece of tungsten.

The Brookhaven-based scientists detected fewer than 40 of these "doubly strange" hypernuclei, but they say they actually produced hundreds of others whose trajectories veered away from the setup's detector.

In prior experiments during the past 40 years at Brookhaven and elsewhere, researchers detected only traces of single hypernuclei after painstaking examinations of particle tracks in filmlike emulsions, says Brookhaven's Adam Rusek, also a team member.