Resonance parameters of the {rho} meson from lattice QCD

Journal Article · Sun May 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.094505· OSTI ID:21541625

Xu, Feng ^[1]; Jansen, Karl; Renner, Dru B ^[1]

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1. NIC, DESY, Platanenallee 6, D-15738 Zeuthen (Germany)

We perform a nonperturbative lattice calculation of the P-wave pion-pion scattering phase in the {rho}-meson decay channel using two flavors of maximally twisted mass fermions at pion masses ranging from 480 to 290 MeV. Making use of finite-size methods, we evaluate the pion-pion scattering phase in the center-of-mass frame and two moving frames. Applying an effective range formula, we find a good description of our results for the scattering phase as a function of the energy covering the resonance region. This allows us to extract the {rho}-meson mass and decay width and to study their quark mass dependence.

• OSTI ID: 21541625
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 9; Other Information: DOI: 10.1103/PhysRevD.83.094505; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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COVERINGS
FLAVOR MODEL
MASS
MESONS
MEV RANGE 100-1000
P WAVES
PARTICLE DECAY
PION-PION INTERACTIONS
QUANTUM CHROMODYNAMICS
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PARTICLE MODELS
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QUARK MODEL