D4 brane probes in gauge/gravity duality
- Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190 (China) and Interdisciplinary Center of Theoretical Studies, USTC, Hefei, Anhui 230026 (China)
We propose a Dirac-Born-Infeld vertex brane+N{sub c} fundamental strings configuration for a probe baryon in the finite-temperature thermal gauge field via AdS/CFT correspondence. In particular, we investigate properties of this configuration in QCD{sub 4} and warped AdS{sub 6}xS{sup 4}. We find that, in the D4-D8 system, a holographic probe baryon can be described as N{sub c} fundamental strings connecting through a vertex D4 brane wrapped on S{sup 4}. In QCD{sub 4} background, a closed vertex can exist in a confined phase but cannot exist in a deconfined phase. In the low temperature region, the screening effect still exists in the confined phase like a meson, and the vertex D4 brane dominates the baryon mass. The lower energy state corresponds to the vertex brane closer to the radial cutoff position (r=r{sub c}), and the higher energy state corresponds to the vertex brane a little farther away from the cutoff position. The high energy limit of this configuration is just like the unclosed vertex brane configuration in a higher temperature deconfined phase. In warped AdS{sub 6}xS{sup 4} background, a closed vertex can exist in a deconfined phase and the vertex contains a spike, while fundamental strings are relatively short. The screening length should be defined through the distance between the top position of the vertex spike and the boundary.
- OSTI ID:
- 21260203
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevD.79.066005; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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