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The Medium Energy group uses hadronic probes to study nuclear physics. The properties of matter and particles containing strange quarks have been of longstanding interest. The group did some of the pioneering experiments in the study of hypernuclei, nuclei containing a lambda particle in addition to neutrons and protons. A hypernucleus is formed when one or more strange quarks are exchanged with those in a nucleus. The fact that the strange quark and the lambda particle are distinguishable from the normal constituents of the nucleus is the source of many of the interesting properties of hypernuclei.
New particle or states of matter (H particles, stangelets, strange matter) have been conjectured to occur when sufficient strangeness is present , due to the increased symmetry possible with three distinct flavors. Several searches for the H particle have been completed by our group.
More recently, the group's attention has turned toward RHIC. We are actively participating in the pp2pp scattering experiments. These are aimed at a study of proton scattering in regions of small, intermediate, and large |t|.
If you have any question regarding this home page, please contact:
R. E. Chrien / chrien@bnl.gov
