and maybe this too...
Is the Higgs mechanism for generating elementary particle masses via electroweak symmetry breaking indeed realised in nature?
Is supersymmetry, an extension of the Standard Model and Poincaré symmetry, realised in nature, implying that all known particles have supersymmetric partners?
Are there extra dimensions, as predicted by various models inspired by string theory, and can we detect them?
What is the nature of the Dark Matter which appears to account for 23% of the mass of the Universe?
Are electromagnetism, the strong nuclear force and the weak nuclear force just different manifestations of a single unified force, as predicted by various Grand Unification Theories?
Why is gravity so many orders of magnitude weaker than the other three fundamental forces? See also Hierarchy problem.
Are there additional sources of quark flavours, beyond those already predicted within the Standard Model?
Why are there apparent violations of the symmetry between matter and antimatter? See also CP violation.
What was the nature of the quark-gluon plasma in the early universe? This will be investigated by ion collisions in ALICE.
go ask alice?...
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