Two new subatomic particles discovered?

[Jameson]

Link to article

My knowledge of physics past basic mechanics is weak but as I understand the Standard Model these two new particles are combinations of other elementary particles rather than two new ones. Anyone want to expand on this article? Big news, not so big? :)

Here is some discussion of the topic on Reddit if you are into the site.

 

[jacobi1]

Well, yes, these two particles are combinations of others, but so are protons and neutrons. Such particles are called baryons. Different combinations of quarks produce different baryons-a neutron is made up of two down quarks and an up quark, while a proton is made of two up quarks and one down quark.
Bottom quarks are very heavy, and so are less likely to form baryons-only nine other particles composed of at least one bottom quark are known to exist, and all have very short lifetimes. More are hypothesized, however, and the discovery of these particles lends credence to the overarching theory of quantum chromodynamics. Also, these are only the third and fourth particles found by the LHC, so, yes, it is big news!