Speaker
Peter Arnold
(University of Virginia)
Description
Previous top-down studies of jet stopping in strongly-coupled QCD-like plasmas with gravity duals have been in the infinite 't Hooft coupling limit $\lambda \to \infty$. They have found that, though a wide range of jet stopping distances are possible depending on initial conditions, the maximum jet stopping distance $\ell_{\rm max}$ scales with energy as $E^{1/3}$ at large energy. But it has always been unclear whether the large-coupling and high-energy limits commute. We use the string $\alpha'$ expansion in AdS-CFT to study the corrections to the $\lambda{=}\infty$ result in powers of $1/\lambda$ by assessing the effects of all higher-derivative corrections to the supergravity action for the gravity dual. We find that sometimes $\lambda=\infty$ results can be trusted for jet stopping, but other times the expansion in $1/\lambda$ breaks down.
Primary authors
Prof.
Diana Vaman
(University of Virginia)
Peter Arnold
(University of Virginia)
