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arXiv 1012.3812hep-lathep-phnucl-th
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束缚H-双重子的格点量子色动力学证据

Evidence for a Bound H-dibaryon from Lattice QCD

S. R. Beane, E. Chang, W. Detmold, B. Joo, H. W. Lin, T. C. Luu, K. Orginos, A. Parreno, M. J. Savage, A. Torok, A. Walker-Loud

摘要:

我们证明了在π质量为389 MeV的π介子中存在一个束缚H-双重子,即I=0,J=0,s=-2的价夸克结构uuddss态.利用格点量子色动力学计算了四种各向异性三叶草规范场组态的空间范围分别为L ~ 2.0,2.5,3.0和3.9 fm,空间格点间距b ~ 0.123 fm的系综,发现了一个π质量m_pi ~ 389 MeV,束缚于B = 16.6 +-2.1 +-4.6 MeV的H-双重子.

英文摘要:

We present evidence for the existence of a bound H-dibaryon, an I=0, J=0, s=-2 state with valence quark structure uuddss, at a pion mass of m_pi ~ 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 ~ 0.123 fm, we find an H-dibaryon bound by B = 16.6 +- 2.1 +- 4.6 MeV at a pion mass of m_pi ~ 389 MeV.

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