* Is the popular Higgs mechanism for generating elementary particle masses in the Standard Model realised in nature? If so, how many Higgs bosons are there, and what are their masses?[10]
* Will the more precise measurements of the masses of the quarks continue to be mutually consistent within the Standard Model?
* Do particles have supersymmetric ("SUSY") partners?[1]
* Why are there apparent violations of the symmetry between matter and antimatter?[1] See also CP-violation.
* Are there extra dimensions indicated by theoretical gravitons, as predicted by various models inspired by string theory, and can we "see" them?
* What is the nature of dark matter and dark energy?[1]
* Why is gravity so many orders of magnitude weaker than the other three fundamental forces?
* Will the more precise measurements of the masses of the quarks continue to be mutually consistent within the Standard Model?
* Do particles have supersymmetric ("SUSY") partners?[1]
* Why are there apparent violations of the symmetry between matter and antimatter?[1] See also CP-violation.
* Are there extra dimensions indicated by theoretical gravitons, as predicted by various models inspired by string theory, and can we "see" them?
* What is the nature of dark matter and dark energy?[1]
* Why is gravity so many orders of magnitude weaker than the other three fundamental forces?

