Hadron Structure from the Feynman-Hellmann Theorem in Lattice QCD
- Event time: 2:00pm
- Event date: 21st July 2016
- Speaker: Alexander Chambers (University of Adelaide)
- Location: Higgs Centre Seminar Room, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
There has been much experimental, theoretical, and computational effort expended in developing our understanding of the internal structure of hadrons. Despite this there are many aspects that remain to be fully understood. The exact nature of the spin decomposition of the nucleon is still unknown, as is the behaviour of electromagnetic form factors of the pion and nucleon at higher momentum transfers. From a lattice perspective, problems arise in calculations of these quantities because of difficulties accessing "disconnected" contributions to matrix elements, and poor signal-to-noise ratios associated with boosted hadron states. In this talk I will discuss results obtained from an alternative lattice methodology motivated by the Feynman-Hellmann theorem.
The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..