Baryons in the Sakai-Sugimoto model in the D0-D4 background

Baryons in the Sakai-Sugimoto model in the D0-D4 background
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D0-D4 背景下 Sakai-Sugimoto 模型中的重子

DOI:
10.1103/physrevd.90.106001
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发表时间:
2014-10
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
通讯作者:
Xiao Zhiguang
Xiao Zhiguang
中科院分区:
其他
文献类型:
--
作者:
Cai Wenhe;Wu Chao;Xiao Zhiguang

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研究了D_4背景下Sakai-Sugimoto模型中的重子谱。我们遵循Hata等人对重子的瞬子描述。Theor. 117,1157(2007)]。背景对应于具有与D 0电荷密度成比例的非零胶凝物的激发态。当我们打开小的D 0电荷密度时,重子的尺寸会缩小。但是对于更大的D 0电荷密度,在规范理论中的质量模也可能起作用,重子的大小将增长。当D 0电荷密度增加时,重子质量之间的差异将变小。也可能有迹象表明,重子将变得不稳定,不能存在足够大的D 0密度。
The baryon spectrum in the Sakai-Sugimoto model in the D4 background with smeared D0 charges is studied. We follow the instanton description of baryons by Hata et al. [Prog. Theor. Phys. 117, 1157 (2007)]. The background corresponds to an excited state with nonzero glue condensate which is proportional to the D0 charge density. The baryon size shrinks when we turn on small D0 charge density. But for larger D0 charge density where massive modes in the gauge theory may also take effect, the size of baryons will grow. The difference between baryon masses will become smaller when D0 charge density increases. There may also be indications that the baryon will become unstable and cannot exist for sufficiently large D0 density.
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发表时间: 2005-05
影响因子: 2.2
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