We review developments leading to the unification of string theories (M-theory), with an emphasis on particle physics implications. We introduce extended objects - Dirichlet branes - and highlight an important geometric role that these objects play in deriving particle physics from string theory. Constructions of string soluations with Dirichlet branes, that have features of the Standard Model with three families of quarks and leptons, are reviewed. We also highlight recent developments, where new stringy non-preturbative effects due to Euclidean D-brane instantons were introduced, and focus their implications for neutrino masses and other couplings of the Standard Model.
Coffee and cookies before the presentation at 3:15 pm, and refreshments after the presentation will both be served in Room 128.