What does "Hamiltonian Effective Field Theory" mean?
Table of Contents
Hamiltonian Effective Field Theory (HEFT) is a way to study the behavior of particles, specifically focusing on the interactions between them. It looks at how different states, or forms, of particles, like baryons and mesons, fit together.
Mixing States
In HEFT, scientists combine single-particle states, which are similar to the particles we know from basic models, with multi-particle channels where particles interact with each other. This helps to create a more complete picture of how these particles behave.
Connecting to Experiments
To make sure their models are accurate, researchers compare their findings with actual experimental data. They often look at measurements from specific scattering processes, such as how pions interact with nucleons. This comparison helps refine the theoretical models.
Lattice QCD and Eigenvectors
Lattice QCD is a method used to study particles on a grid, which allows for detailed calculations about their properties. In HEFT, the results from lattice QCD can be linked back to these particle interactions. Eigenvectors, which represent the different states of particles, help scientists categorize and understand the properties of these particles better.
Insights into Resonances
By using HEFT alongside lattice QCD, scientists can gain insight into specific resonances, like the $\Delta(1600)$. They discover that the resonance's main features arise from strong interactions between pions and nucleons rather than just from the basic quark model. This shift in understanding can lead to new perspectives on how these particles are structured and interact.