Spin-2 NΩ dibaryon from lattice QCD

被引：49

作者：

Etminan, Faisal ^{[1
,2
,3
]}

Nemura, Hidekatsu ^{[1
]}

Aoki, Sinya ^{[1
,3
]}

Doi, Takumi ^{[4
]}

Hatsuda, Tetsuo ^{[4
,5
]}

Ikeda, Yoichi ^{[4
]}

Inoue, Takashi ^{[6
]}

Ishii, Noriyoshi ^{[1
]}

Murano, Keiko ^{[3
]}

Sasaki, Kenji ^{[1
]}

机构：

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

[2] Univ Birjand, Fac Sci, Dept Phys, Birjand 97175615, Iran

[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

[4] RIKEN, Nishina Ctr, Theoret Res Div, Wako, Saitama 3510198, Japan

[5] Univ Tokyo, Kavli IPMU WPI, Chiba 2778583, Japan

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

来源：

NUCLEAR PHYSICS A | 2014年 / 928卷

关键词：

N Omega interaction; N Omega potential; N Omega dibaryon; Lattice QCD; QUARK-MODEL; HADRON INTERACTIONS; H-DIBARYON; SIMULATIONS;

D O I：

10.1016/j.nuclphysa.2014.05.014

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We investigate properties of the N(nucleon)-Omega(Omega) interaction in lattice QCD to seek for possible dibaryon states in the strangeness -3 channel. We calculate the N Omega potential through the equal-time Nambu-Bethe-Salpeter wave function in 2 + 1 flavor lattice QCD with the renormalization group improved Iwasaki gauge action and the nonperturbatively O(a) improved Wilson quark action at the lattice spacing a similar or equal to 0.12 fm on a (1.9 fm)(3) x 3.8 fm lattice. The ud and s quark masses in our study correspond to m(pi) = 875(1) MeV and m(K) = 916(1) MeV. At these parameter values, the central potential in the S-wave with the spin 2 shows attractions at all distances. By solving the Schrodinger equation with this potential, we find one bound state whose binding energy is 18.9(5.0) ((+12.1)(-1.8)) MeV, where the first error is the statistical one, while the second represents the systematic error. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：89 / 98

页数：10

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