APS | PHYSICS | JUNE 17 2013
|| NEW PARTICLE HINTS AT FOUR QUARK MATTER ||
Two experiments have detected the signature of a new particle , which may combine quarks in a way not seen before .
Particle physicists seem to have a pretty good handle on the fundamental particles of the universe , but there are some glaring holes in this understanding .
Quarks are a good example of this .
We know that all nuclear matter is made up of quarks , and we have a pretty good understanding of how two quarks interact at close range .
But our quark theory cannot tell us which quark combinations will result in a bound particle or a stable nuclei .
All we can go on is experience , and experience has shown that particles with four quarks do not exist .
But the situation may have changed with the possible discovery of a new particle containing at least four quarks .
Two separate groups , both reporting in Physical Review Letters , have seen evidence for this strange particle , called Zc ( 3900 ) .
Although the data is open to other interpretations , it’s clear that our understanding of quarks has a long way to go .
SOURCE | SATYAVEDISM.COM