I'd diseuss several topical issues in hadronic weak decays which can serve as a useful probe forunderstanding the internal structure of hadrons in the non-perturbative regime.

Abstract: The search for the QCD critical point in heavy ion collisions requires the inclusion of fuctuations in hydrodynamicsimulations of Quark-Gluon Plasma (OGP). Schwinger-keldysh Efiective Field Theory (SK-EFT) systematically incorporatesthese fluctuations, extending beyond classical hydrodynamics, which only accounts for dissipation. After a brief review of SK-EF'T, we highlight several o...

The quest of exotic hadrons with multiquark configuration beyond theconventional constituent quark model has been one of central subiects inhadron physics for decades. Among others, the doubly heavy tetraguarkcomposed of two heavy quarks and two light antiquarks attracts significantinterest, since it represents the simplest candidate with explicit multiguarkfeature and is expected to be bound u...