Look inside charmed-strange baryons from lattice QCD

被引：51

作者：

Can, K. U. ^{[1
]}

Erkol, G. ^{[2
]}

Oka, M. ^{[1
,3
]}

Takahashi, T. T. ^{[4
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[2] Ozyegin Univ, Fac Engn, Dept Nat & Math Sci, TR-34794 Istanbul, Turkey

[3] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[4] Gunma Natl Coll Technol, Maebashi, Gunma 3718530, Japan

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 11期

关键词：

FERMIONS;

D O I：

10.1103/PhysRevD.92.114515

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The electromagnetic form factors of the spin-3/2 Omega baryons, namely Omega, Omega(*)(c), Omega(*)(cc) and Omega(ccc), are calculated in full QCD on 32(3) x 64 PACS-CS lattices with a pion mass of 156(9) MeV. The electric charge radii and magnetic moments from the E0 and M1 multipole form factors are extracted. Results for the electric quadrupole form factors, E2, are also given. Quark sector contributions are computed individually for each observable and then combined to obtain the baryon properties. We find that the charm quark contributions are systematically smaller than the strange-quark contributions in the case of the charge radii and magnetic moments. E2 moments of the Omega(c) Omega(*)(cc) and Omega(ccc) provide a statistically significant data to conclude that their electric charge distributions are deformed to an oblate shape. Properties of the spin-1/2 Omega(c) and Omega(cc) baryons are also computed and a thorough comparison is given. This complete study gives valuable hints about the heavy-quark dynamics in charmed hadrons.

引用

页数：14

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