Free-form Smeared Bottomonium Correlation Functions

Understand

Gauge-invariant sources with a hydrogen wave function shape are constructed for bottomonium two-point correlation functions using the free-form smearing technique.

• The bottomonium spectrum, including a first lattice result for the D-wave first-excited state, is extracted from free-form smeared correlation functions.
• Results are compared with conventional smearing techniques and free-form smearing is found to have the advantage of reduced statistical errors.