Evidence for a Bound H Dibaryon from Lattice QCD

被引：207

作者：

Beane, S. R. ^{[1
,2
]}

Chang, E. ^{[3
]}

Detmold, W. ^{[4
,5
]}

Joo, B. ^{[5
]}

Lin, H. W. ^{[6
]}

Luu, T. C. ^{[7
]}

Orginos, K. ^{[4
,5
]}

Parreno, A. ^{[3
]}

Savage, M. J. ^{[6
]}

Torok, A. ^{[8
]}

Walker-Loud, A. ^{[9
]}

机构：

[1] Univ Bern, Inst Theoret Phys, Albert Einstein Zentrum Fundamentale Phys, CH-3012 Bern, Switzerland

[2] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[3] Univ Barcelona, Dept Estructura & Constituents Mat, ICC, E-08028 Barcelona, Spain

[4] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[5] Jefferson Lab, Newport News, VA 23606 USA

[6] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[7] Lawrence Livermore Natl Lab, Div N, Livermore, CA 94551 USA

[8] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[9] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 16期

关键词：

SCATTERING LENGTHS; NUCLEON-SCATTERING;

D O I：

10.1103/PhysRevLett.106.162001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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) similar to 389 MeV. Using the results of lattice QCD calculations performed on four ensembles of anisotropic clover gauge-field configurations, with spatial extents of L similar to 2.0, 2.5, 3.0, and 3.9 fm at a spatial lattice spacing of b(s) similar to 0.123 fm, we find an H dibaryon bound by B-infinity(H) = 16.6 +/- 2.1 +/- 4.6 MeV at a pion mass of m(pi) similar to 389 MeV.

引用

页数：4

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