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Title: (pi)K scattering in full QCD with domain-wall valence quarks.
Author: Beane, Silas R.
Bedaque, Paulo F.
Luu, Thomas C.
Orginos, Kostas
Pallante, Elisabetta
Parreño García, Assumpta
Savage, Martin J.
Keywords: Partícules (Física nuclear)
Cromodinàmica quàntica
Particles (Nuclear physics)
Quantum chromodynamics
Issue Date: 2006
Publisher: The American Physical Society
Abstract: We calculate the pi+ K+ scattering length in fully-dynamical lattice QCD with domain-wall valence quarks on MILC lattices with rooted staggered sea-quarks at a lattice spacing of b=0.125 fm, lattice spatial size of L =2.5 fm and at pion masses of m_pi=290, 350, 490 and 600 MeV. The lattice data, analyzed at next-to-leading order in chiral perturbation theory, allows an extraction of the full pi K scattering amplitude at threshold. Extrapolating to the physical point gives m_pi a_3/2 = -0.0574 (+- 0.0016)(+0.0024 -0.0058) and m_pi a_1/2 = 0.1725 (+- 0.0017)(+0.0023 -0.0156) for the I=3/2 and I=1/2 scattering lengths, respectively, where the first error is statistical and the second error is an estimate of the systematic due to truncation of the chiral expansion.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review 2006, vol. 74, núm. 11, p. 114503-1-114503-9
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ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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