D4 brane probes in gauge/gravity duality

Abstract

We propose a DBI vertex brane + $N_c$ 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_4 and warped AdS_6\times S^4. We find that, in D4-D8 system, a holographic probe baryon can be described as N_c fundamental strings connecting through a vertex D4 brane wrapped on S^4. In QCD_4 background, a closed vertex can exist in confined phase and can not exist in deconfined phase. In the low temperature region, screening effect still exist in confined phase like meson and the vertex D4 brane dominates the baryon mass. The lower energy state corresponds to vertex brane closer to the radial cut off position (r=r_c) and the higher energy state corresponds to vertex brane a little far away from the cut off 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_6\times S^4 background, a closed vertex can exist in deconfined phase and the vertex contains a spike, while fundamental strings are relatively short. Screening length should be defined through the distance between top position of the vertex spike and the boundary.

22 pages, 6 figures, the name "binding energy" was replaced for our defination, to appear on PRD

References in corpus (14)

• Chiral Dynamics of Baryons from String Theory
• Shear Viscosity from Effective Couplings of Gravitons
• Light quark energy loss in strongly-coupled N = 4 supersymmetric Yang-Mills plasma
• Dynamics of Baryons from String Theory and Vector Dominance
• Collisional energy loss of a fast heavy quark in a quark-gluon plasma
• Holographic vector mesons from spectral functions at finite baryon or isospin density
• High-energy jet quenching in weakly-coupled quark-gluon plasmas
• Shear Viscosity from AdS Born-Infeld Black Holes
• Robustness and Infrared Sensitivity of Various Observables in the Application of AdS/CFT to Heavy Ion Collisions
• Velocity Dependence of Baryon Screening in a Hot Strongly Coupled Plasma
• Quarkonium transport in thermal AdS/CFT
• Baryons with D5 Brane Vertex and k-Quarks
• Stability issues with baryons in AdS/CFT
• Rotating Strings in Massive Type IIA Supergravity