Sau Lan Wu (Chinese: 吳秀蘭) is a Chinese American particle physicist and the Enrico Fermi Distinguished Professor of Physics at the University of Wisconsin-Madison. She made important contributions towards the discovery of the J/psi particle, which provided experimental evidence for the existence of the charm quark, and the gluon, the vector boson of the strong force in the Standard Model of physics. Most notably, the team she worked in the European Organization for Nuclear Research (CERN) with the Large Hadron Collider (LHC) is part of the international effort in the discovery of a boson consistent with the Higgs boson, the so-called 'God Particle'.