Multi-hadron spectroscopy in a large physical volume

Abstract

We demonstrate the efficacy of the stochastic LapH method to treat all-to-all quark propagation on a $N_f=2+1$ CLS ensemble with large linear spatial extent $L=5.5$ fm, allowing us to obtain the benchmark elastic isovector p-wave pion-pion scattering amplitude to good precision already on a relatively small number of gauge configurations. These results hold promise for multi-hadron spectroscopy at close-to-physical pion mass with exponential finite-volume effects under control.

8 pages, 4 figures. Presented at Lattice 2017, the 35th International Symposium on Lattice Field Theory, Granada, Spain, 18-24 June 2017

References in corpus (1)

• Simulation of QCD with N_f=2+1 flavors of non-perturbatively improved Wilson fermions

Cited by in corpus (4)

• The $I=1$ pion-pion scattering amplitude and timelike pion form factor from $N_{\mathrm{f}}=2+1$ lattice QCD
• Two-nucleon S-wave interactions at the $SU(3)$ flavor-symmetric point with $m_{ud}\simeq m_s^{\mathrm{phys}}$: a first lattice QCD calculation with the stochastic Laplacian Heaviside method
• CLS 2+1 flavor simulations at physical light- and strange-quark masses
• Repurposing lattice QCD results for composite phenomenology