Exotic meson decay widths using lattice QCD

Journal Article · Tue Aug 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.034509· OSTI ID:20869268

Cook, M S; Fiebig, H R ^[1]

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1. Department of Physics, Florida International University, Miami, Florida, 33199 (United States)

A decay width calculation for a hybrid exotic meson h, with J{sup PC}=1{sup -+}, is presented for the channel h{yields}{pi}a{sub 1}. This quenched lattice QCD simulation employs Luescher's finite box method. Operators coupling to the h and {pi}a{sub 1} states are used at various levels of smearing and fuzzing, and at four quark masses. Eigenvalues of the corresponding correlation matrices yield energy spectra that determine scattering phase shifts for a discrete set of relative {pi}a{sub 1} momenta. Although the phase shift data is sparse, fits to a Breit-Wigner model are attempted, resulting in a decay width of about 60 MeV when averaged over two lattice sizes having a lattice spacing of 0.07 fm.

• OSTI ID: 20869268
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
BREIT-WIGNER FORMULA
COMPUTERIZED SIMULATION
CORRELATIONS
COUPLING
EIGENVALUES
ENERGY SPECTRA
LATTICE FIELD THEORY
MATRICES
MEV RANGE
PARTICLE DECAY
PARTICLE WIDTHS
PHASE SHIFT
PIONS
QUANTUM CHROMODYNAMICS
QUARKS
REST MASS
SCATTERING