Handling Excited States on the Lattice: The GEVP Method
Tereza Mendes
TL;DR
This paper reviews the GEVP method for disentangling excited states in lattice QCD calculations, demonstrating its application to the B_s-meson spectrum within nonperturbative HQET at order 1/m_b.
Contribution
It provides a comprehensive review of the GEVP technique and applies it to determine the B_s-meson spectrum in a specific lattice QCD framework.
Findings
Successful extraction of B_s-meson spectrum using GEVP
Demonstration of GEVP efficiency in excited state analysis
Application within quenched nonperturbative HQET at order 1/m_b
Abstract
High-precision calculations of hadron spectroscopy are a crucial task for Lattice QCD. State-of-the-art techniques are needed to disentangle the contributions from different energy states, such as solving the generalized eigenvalue problem (GEVP) for zero-momentum hadron correlators in an efficient way. We review the method and discuss its application in the determination of the -meson spectrum using (quenched) nonperturbative HQET at order .
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research