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Title: Precise determination of the I=2 ππ scattering length from mixed-action lattice QCD
Author: Beane, Silas R.
Luu, Thomas C.
Orginos, Kostas
Parreño García, Assumpta
Savage, Martin J.
Torok, Aaron
Walker-Loud, André
NPLQCD Collaboration
Keywords: Física de partícules
Interaccions d'hadrons
Particle physics
Hadron interactions
Issue Date: 14-Jan-2008
Publisher: American Physical Society
Abstract: The I = 2 π π scattering length is calculated in fully dynamical lattice QCD with domain-wall valence quarks on the asqtad-improved coarse MILC configurations (with fourth-rooted staggered sea quarks) at four light-quark masses. Two- and three-flavor mixed-action chiral perturbation theory at next-to-leading order is used to perform the chiral and continuum extrapolations. At the physical charged pion mass, we find m π a I = 2 π π = − 0.043   30 ± 0.000   42 , where the error bar combines the statistical and systematic uncertainties in quadrature.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2008, vol. 77, num. 1, p. 014505
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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