Abstract
The scalar meson is found below the threshold in a lattice simulation of the channel using, for the first time, both as well as interpolating fields. The simulation is done on gauge configurations with , and the resulting is close to the experimental value . The energy level related to the scalar meson is accompanied by additional discrete levels due to scattering states. The levels near threshold lead to the negative scattering length that indicates the presence of a state below threshold.
- Received 23 August 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.222001
© 2013 American Physical Society