Most Strange Dibaryon from Lattice QCD

被引：88

作者：

Gongyo, Shinya ^{[1
]}

Sasaki, Kenji ^{[1
,2
]}

Aoki, Sinya ^{[1
,2
,3
]}

Doi, Takumi ^{[1
,4
]}

Hatsuda, Tetsuo ^{[1
,4
]}

Ikeda, Yoichi ^{[1
,5
]}

Inoue, Takashi ^{[1
,6
]}

Iritani, Takumi ^{[1
]}

Ishii, Noriyoshi ^{[1
,5
]}

Miyamoto, Takaya ^{[1
,2
]}

Nemura, Hidekatsu ^{[1
,5
]}

机构：

[1] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

[2] Kyoto Univ, Ctr Gravitat Phys, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

[3] Univ Tsukuba, Ctr Computat Sci, Ibaraki 3058571, Japan

[4] RIKEN, iTHEMS Program, Wako, Saitama 3510198, Japan

[5] Osaka Univ, RCNP, Osaka 5670047, Japan

[6] Nihon Univ, Coll Bioresource Sci, Fujisawa, Kanagawa 2520880, Japan

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 21期

关键词：

QUARK DELOCALIZATION; STATES; MODEL;

D O I：

10.1103/PhysRevLett.120.212001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Omega Omega system in the S-1(0) channel (the most strange dibaryon) is studied on the basis of the (2 + 1)-flavor lattice QCD simulations with a large volume (8.1 fm)(3) and nearly physical pion mass m(pi) similar or equal to 146 MeV at a lattice spacing of a similar or equal to 0.0846 fm. We show that lattice QCD data analysis by the HAL QCD method leads to the scattering length a(0) = 4.6(6) ((+1.2)(-0.5)) fm, the effective range r(eff) = 1.27(3)((+0.06)(-0.03)) fm, and the binding energy B-Omega Omega = 1.6(6)((+0.7)(-0.6)) MeV. These results indicate that the Omega Omega system has an overall attraction and is located near the unitary regime. Such a system can be best searched experimentally by the pair-momentum correlation in relativistic heavy-ion collisions.

引用

页数：6

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