Fermions and baryons as open-string states from brane junctions

Abstract

There has been recent progress towards understanding the dynamics of world-volume fermions that arise as open-string modes from brane intersections in the probe limit $(N_f/N_c\to 0)$. In this work we consider all possible BPS brane junctions in Type IIA/B supergravity theories. We study in detail the dynamics of these states by deriving their equations of motion. We show the expected degeneracy of the bosonic and fermionic fluctuations as is expected due to the preserved supersymmetry. We also give some supporting evidence and refine the notion that these states can effectively describe baryon operators in a certain regime of the field theory's parameter space. Our piece of evidence is the demonstration of the expected scaling of the mass in the large-$N_c$ limit of the theory for these fermionic states; $M^2\sim N_c^2$. Finally, we explain analytically the avoided level crossing that was observed in a previous work after the inclusion of higher dimension operators in the field theory.

37 pages, 9 tables, 4 figures, typos corrected, JHEP version

References in corpus (9)

• On String Theory Duals of Lifshitz-like Fixed Points
• AdS/CFT with Flavour in Electric and Magnetic Kalb-Ramond Fields
• Conformal Windows of SU(N) Gauge Theories, Higher Dimensional Representations and The Size of The Unparticle World
• The Spectrum of Excitations of Holographic Wilson Loops
• Holographic mesons in various dimensions
• Fermionic Operator Mixing in Holographic p-wave Superfluids
• Spectroscopy of fermionic operators in AdS/CFT
• Open string modes at brane intersections
• D-brane probes on L^{abc} Superconformal Field Theories

Cited by in corpus (1)

• Holographic nuclear matter in presence of chemical potential at finite temperature