Speaker
Description
Recent advances in lattice QCD have enabled increasingly precise first-principles calculations of nucleon structure observables. In this talk, I will present recent progress on nucleon electromagnetic and axial form factors, together with flavor-diagonal nucleon charges, with particular emphasis on controlling excited-state contamination. I will discuss data-driven analyses guided by the low-lying $N\pi$ spectrum, highlighting how an inadequate description of excited states can significantly bias the extracted nucleon matrix elements, with important consequences for quantities such as sigma terms, axial form factors, and the PCAC relation. Finally, I will briefly introduce our ongoing preliminary efforts toward lattice studies of multi-hadron systems using multi-hadron operators within the framework of lattice hadron spectroscopy. These efforts provide a natural pathway toward future studies of hadron resonances and more complex hadronic systems relevant to exotic hadron spectroscopy.
