Title:
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Evidence for a Bound H-dibaryon from Lattice QCD
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Author:
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Beane, Silas R.; Chang, Emmanuel; Detmold, William; Joo, B.; Lin, H. W.; Luu, Thomas C.; Orginos, Kostas; Parreño García, Assumpta; Savage, Martin J.; Torok, Aaron; Walker-Loud, André; NPLQCD Collaboration
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Other authors:
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Universitat de Barcelona |
Abstract:
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We present evidence for the existence of a bound H dibaryon, an I = 0 , J = 0 , s = − 2 state with valence quark structure u u d d s s , at a pion mass of m π ∼ 389 MeV . Using the results of lattice QCD calculations performed on four ensembles of anisotropic clover gauge-field configurations, with spatial extents of L ∼ 2.0 , 2.5, 3.0, and 3.9 fm at a spatial lattice spacing of b s ∼ 0.123 fm , we find an H dibaryon bound by B H ∞ = 16.6 ± 2.1 ± 4.6 MeV at a pion mass of m π ∼ 389 MeV . |
Subject(s):
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-Física de partícules -Experiments -Particle physics -Experiments |
Rights:
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(c) American Physical Society, 2011
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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