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The H-dibaryon (uuddss) is studied in holographic QCD for the first time. Inholographic QCD, four-dimensional QCD, i.e., SU($N_c$) gauge theory with chiralquarks, can be formulated with $S^1$-compactified D4/D8/$\overline{\rmD8}$-brane system. In holographic QCD with large $N_c$, all the baryons appearas topological chiral solitons of Nambu-Goldstone bosons and (axial) vectormesons, and the H-dibaryon can be described as an SO(3)-type topologicalsoliton with $B=2$. We derive the low-energy effective theory to describe theH-dibaryon in holographic QCD. The H-dibaryon mass is found to be twice of the$B=1$ hedgehog-baryon mass, $M_{\rm H} \simeq 2.00 M_{B=1}^{\rm HH}$, and isestimated about 1.7GeV, which is smaller than mass of two nucleons(flavor-octet baryons), in the chiral limit.

Holographic QCD for H-dibaryon (uuddss)