Título:
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(pi)K scattering in full QCD with domain-wall valence quarks.
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Autor/a:
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Beane, Silas R.; Bedaque, Paulo F.; Luu, Thomas C.; Orginos, Kostas; Pallante, Elisabetta; Parreño García, Assumpta; Savage, Martin J.
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Partícules (Física nuclear) -Cromodinàmica quàntica -Particles (Nuclear physics) -Quantum chromodynamics |
Derechos:
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(c) The American Physical Society, 2006
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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The American Physical Society
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