ρ meson decay on asymmetrical lattices

2011/11/09 by Craig Pelissier, Andrei Alexandru, Pelissier, Craig +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #hep-lat

paper · pdf · doi:10.48550/arxiv.1111.2314

8 pages, 5 figures, presented at The XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16, 2011, Squaw Valley, Lake Tahoe, California

arxiv created 2011/11/09 · arxiv updated 2011/11/10

Abstract

We present a lattice QCD calculation of the characteristics of the ρ meson decay. The study is carried out on spatially asymmetric boxes using nHYP-smeared clover fermions in the quenched approximation. The resonance mass and coupling constant are calculate using the P-wave scattering phaseshifts, of the isospin I=1 two-pion system. We use pion masses m_π= 418 MeV and m_π=312 MeV. In both cases, the ρ decay is kinematically feasible. We work on lattice sizes N_z X 24² X 48 with lattice spacing a=0.1 fm and N_z=24,30,34,48.

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