TL;DR
This paper discusses key unresolved issues in particle physics, including neutrino oscillations, new physics indications from astrophysics, electroweak symmetry breaking, and strong interactions at various energies.
Contribution
It provides a personal overview of the most significant open problems in particle theory, highlighting areas needing further research.
Findings
Neutrino oscillations challenge the three-generation model
Astrophysical observations suggest potential new physics
Understanding strong interactions remains incomplete
Abstract
I consider selected (most important according to my own choice) unsolved problems in particle theory, both those related to extensions of the Standard Model (neutrino oscillations, which probably do not fit the usual three-generation scheme; indications in favour of new physics from astrophysical observations; electroweak symmetry breaking and hierarchy of parameters) and those which appear in the Standard Model (description of strong interactions at low and intermediate energies).
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