Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic Heavy-Light Chiral Effective Action   We propose a variant of the $D4$-$D8$ construction to describe the low energy
effective theory of heavy-light mesons, interacting with the lowest lying
pseudoscalar and vector mesons. The heavy degrees of freedom are identified
with the $D8_L$-$D8_H$ string low energy modes, and are approximated near the
world volume of $N_f-1$ light $D8_L$ branes, by fundamental vector field valued
in $U(N_f-1)$. The effective action follows from the reduction of the bulk
D-brane Born-Infeld (DBI) and Chern-Simons (CS) actions, and is shown to
exhibit both chiral and heavy-quark symmetry. The action interpolates
continuously between the $U(N_f)$ case with massless mesons, and the $U(N_f-1)$
case with heavy-light mesons. The heavy-light meson radial spectrum is
Regge-like. The one-pion and two-pion couplings to the heavy-light multiplets
are evaluated. The partial widths for the charged decays $G\rightarrow H+\pi$
are shown to be comparable to the recently reported full widths for both the
charm and bottom mesons.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn