Unified chiral analysis of the vector meson spectrum from lattice QCD

Abstract

The chiral extrapolation of the vector meson mass calculated in partially-quenched lattice simulations is investigated. The leading one-loop corrections to the vector meson mass are derived for partially-quenched QCD. A large sample of lattice results from the CP-PACS Collaboration is analysed, with explicit corrections for finite lattice spacing artifacts. To incorporate the effect of the opening decay channel as the chiral limit is approached, the extrapolation is studied using a necessary phenomenological extension of chiral effective field theory. This chiral analysis also provides a quantitative estimate of the leading finite volume corrections. It is found that the discretisation, finite-volume and partial quenching effects can all be very well described in this framework, producing an extrapolated value of M_ρin excellent agreement with experiment. This procedure is also compared with extrapolations based on polynomial forms, where the results are much less enlightening.

30 pages, 13 figs

References in corpus (10)

• Infrared regularization for spin-1 fields
• Twist-two matrix elements at finite and infinite volume
• Leading Quenching Effects in the Proton Magnetic Moment
• Chiral and Continuum Extrapolation of Partially-Quenched Lattice Results
• Towards a Connection Between Nuclear Structure and QCD
• Extrapolation of lattice QCD results beyond the power-counting regime
• Improving the ultraviolet behavior in baryon chiral perturbation theory
• Chiral perturbation theory at non-zero lattice spacing
• The Pseudoscalar Meson Mass to Two Loops in Three-Flavor Partially Quenched $\chi$PT
• Vector Meson Mass Corrections at O(a^2) in PQChPT with Wilson and Ginsparg-Wilson quarks

Cited by in corpus (20)

• Scattering processes and resonances from lattice QCD
• Calculating the hadronic vacuum polarization and leading hadronic contribution to the muon anomalous magnetic moment with improved staggered quarks
• Dependence of nuclear binding on hadronic mass variation
• Meson masses and decay constants from unquenched lattice QCD
• Chiral extrapolation of nucleon magnetic form factors
• Strange magnetic form factor of the proton at $Q^2=0.23$ GeV${}^2$
• Two-flavor Simulations of the $\rho (770)$ and the Role of the $K\bar{K}$ Channel
• Finite-volume and partial quenching effects in the magnetic polarizability of the neutron
• Chiral extrapolations for nucleon electric charge radii
• Chiral extrapolations for nucleon magnetic moments
• Power Counting Regime of Chiral Effective Field Theory and Beyond
• The First Moments of Nucleon Generalized Parton Distributions
• Chiral extrapolation of nucleon magnetic moments at next-to-leading-order
• An analysis of the nucleon spectrum from lattice partially-quenched QCD
• Chiral behavior of vector meson self energies
• Anatomy of the $\rho$ resonance from lattice QCD at the physical point
• Variations of nuclear binding with quark masses
• Chiral extrapolation beyond the power-counting regime
• Chiral extrapolation of the charged-pion magnetic polarizability with Padé approximant
• Nucleon magnetic form factors with non-local chiral effective Lagrangian