quantum mechanics: top quark (Introduction)
new quark four-way combo:-http://www.scientificamerican.com/article/quirky-quark-combo-creates-exotic-new-particle/?&WT.mc_id=SA_SPC_20140410
new quark four-way combo:-http://www.scientificamerican.com/article/quirky-quark-combo-creates-exotic-new-particle/?&WT.mc_id=SA_SPC_20140410
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