文章基本信息

标题：Lattice QCD study of baryon-baryon interactions in the (S,I)=(-2,0) system using the coupled-channel formalism
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作者：K. Sasaki
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We investigate baryon-baryon interactions with strangeness S=−2 and isospin I =0 system from Lattice QCD. In order to solve this system, we prepare three types of baryon-baryon operators (L−L, N −X and S−S) for the sink and construct three source operators diagonalizing the 3×3 correlation matrix. Combining of the prepared sink operators with the diagonalized source operators, we obtain nine effective Nambu-Bethe-Salpeter (NBS) wave functions. The 3×3 potential matrix is calculated by solving the coupled-channel Schrödinger equation. The flavor SU(3) breaking effects of the potential matrix are also discussed by comparing with the results of the SU(3) limit calculation. Our numerical results are obtained from three sets of 2+1 flavor QCD gauge configurations provided by the CP-PACS/JLQCD Collaborations.