Holographic mesons in global Pilch-Warner background geometry

TL;DR

This paper investigates meson spectra via D-brane fluctuations in the global Pilch-Warner background, revealing equidistant higher modes and shifted ground states, contributing to holographic QCD models.

Contribution

It provides a detailed analysis of scalar fluctuations on probe D-branes in the Pilch-Warner background, highlighting spectral structures and shifts not previously characterized.

Findings

Higher modes exhibit equidistant spacing.

Ground states show additional spectral shifts.

Spectral features depend on brane configurations.

Abstract

In this paper we study D-brane scalar fluctuations in global Pilch-Warner background geometry. We consider configurations of the probe branes compatible with the kappa symmetry preserving condition and the brane classical equations of motion. The corresponding meson spectra, obtained by the fluctuations along the transverse brane directions, admit equidistant structure for the higher modes, but some of them show additional shifts in their ground states.