Charmonium moving through a strongly coupled QCD plasma: A holographic perspective

Abstract

The properties of charmonium in a strongly coupled QCD-like plasma at finite momentum are studied. This is based upon a ''bottom-up'' holographic model which has been previously shown to reproduce charmonium phenomenology in vacuum and give a reasonable dissociation temperature at zero momentum. The finite momentum spectral functions are presented and found to be consistent with recent lattice results. The in-medium dispersion relation and momentum dependence of the decay width of J=c have also been investigated. We find no signature of a subluminal limiting velocity from the dispersion relation, while we note that the dissociation temperature decreases with momentum faster than previous holographic models. Based upon the dissociation temperature, a maximum momentum for J=c in-medium is identified and its phenomenological implications on J=c suppression are discussed.

Melting of charmonium in a magnetic field from an effective AdS/QCD model

“…In the meantime, more involved holographic charmonium models became available on the market, see e.g. [51,55], where additional parameters are introduced to also provide a realistic charmonium decay width etc. This goal is essentially achieved by making a wise choice for the dilaton profile.…”

Quarkonia Formation in a Holographic Gravity–Dilaton Background Describing QCD Thermodynamics

“…The equation of motion (2) of ϕ can also be employed to compute quarkonia spectral functions, cf., [25,[33][34][35]60]. For ω 2 = p µ p µ > 0 fixed, the asymptotic boundary behavior facilitates two linearly independent solutions by considering the leading order terms on both sides of the interval [0, z H ].…”

“…This prevents an unambiguous mapping of m 0,1 → (a, b). While the radial excitations of J/ψ follow quite accurately a linear Regge trajectory in nature [62], the request for accommodating further J/ψ properties in U 0 also calls for modifying (12), cf., [35,60]. Despite the mentioned deficits, the appeal of ( 12) and ( 13) is nevertheless the simply invertible relation m 2 n (a, b) yielding a(m 0,1 ) and b(m 0,1 ).…”

Radiation Gauge in AdS/QCD: Inadmissibility and implications on spectral functions in the deconfined phase

“…We are thus forced to conclude that the radiation gauge choice is impossible to implement for the AdS black hole. For a non-exhaustive list of instances where such has been done, we refer to [4][5][6][7][8][9][10].…”