Holographic heavy-light mesons from non-Abelian DBI

Understand

In the context of gauge/gravity duals with flavor, we examine heavy-light mesons which involve a heavy and a light quark.

• For this purpose we embed two D7 brane probes at different positions into the gravity background.
• We establish the non-Abelian Dirac-Born-Infeld (DBI) action for these probes, in which the U(2) matrix describing the embedding is diagonal.
• The fluctuations of the brane probes correspond to the mesons.