Holographic hadrons in a confining finite density medium

Abstract

Abstract:We study a sector of the hadron spectrum in the presence of finite baryon density. We use a non-supersymmetric gravity dual to a confining guage theory which exhibits a running dilaton. The interaction of mesons with the finite density medium is encoded in the dual theory by a force balancing between flavor D7-branes and a baryon vertex provided by a wrapped D5-brane. When the current quark mass m q is sufficiently large, the meson mass reduces, exhibiting an interesting spectral flow as we increase the baryon density while it has a more complicated behaviour for very small m q .

Meson effective mass in the isospin medium in hard-wall AdS/QCD model

“…Obviously, in this case all m s a coefficients in the Bessel function solutions are the same, m s a = ω 0 , and the necessity does not arise to distinguish z I R in the mass spectrum formula (43). In (44) we obtained this spectrum formula introducing boundary terms, but the effective mass in our case obeys the defining relations (30) and (33).…”

“…The AdS/QCD idea was extended to the finite temperature case in [17][18][19][20][21][22][23][24][25][26] and a great number of works were devoted to a holographic description of the quark-gluon plasma and dense nuclear matter [27][28][29]. In the framework of holographic QCD the studies in the dense nucleon and isospin mediums turned out a e-mail: sh.mamedov62@gmail.com to be as effective in a top-down approach [30][31][32][33] as in a bottom-up one [34][35][36][37][38][39].…”

Holographic Description of the QCD Phase Diagram And Out of Equilibrium Dynamics

“…Such a configuration must have a surface gauge field sourced by N fundamental strings ending on it to be consistent, suggesting it can be thought of as a baryon. In [5] new configurations of a D7 ending on such a wrapped D5 (the fundamental strings pull the D5 and D7 to meet at a point, subject to a force balancing condition [37,38,39]) were included in the model so far discussed. For particular choices of parameter space a QCD-like baryonic phase was achieved as shown in The transition to the phase with baryon density is second order whilst in QCD it is known to be first order at low T -the difference is due to the absence of inter-baryonic interactions in our description (attempts to include such interactions can be found in [40]).…”

The dropping of in-medium hadron mass in holographic QCD

“…We will focus on the low temperature, highly dense system, holographically realized as the confining D4 with the compact baryonic D4 brane geometry [3,4]. The non-supersymmetric, confining D4 brane background with Euclidean signature, is given by…”

“…Once the first step is taken, then one could proceed to make predictions beyond the normal density n 0 in as yet un-probed regime. The dense system we shall holographically realize is the confining D4 with the compact baryonic D4 brane geometry discussed in [3,4].…”