Santosh K. Das

Toward a solution to the RAA and v2 puzzle for heavy quarks

The heavy quarks constitutes a unique probe of the quark-gluon plasma properties. Both at RHIC and LHC energies a puzzling relation between the nuclear modification factor

Heavy-flavor in-medium momentum evolution: Langevin versus Boltzmann approach

R_{AA}(p_T)

Diffusion of Lambda(c) in hot hadronic medium and its impact on Lambda(c)/D ratio

and the elliptic flow

Momentum dependence of drag coefficients and heavy flavour suppression in quark gluon plasma

v_2(p_T)

Dragging D mesons by hot hadrons

has been observed which challenged all the existing models, especially for D mesons. We discuss how the temperature dependence of the heavy quark drag coefficient is responsible for a large part of such a puzzle. In particular, we have considered four different models to evaluate the temperature dependence of drag and diffusion coefficients propagating through a quark gluon plasma (QGP). All the four different models are set to reproduce the same

Directed flow of charm quarks as a witness of the initial strong magnetic field in ultra-relativistic heavy ion collisions

R_{AA}(p_T)

Examination of the Gunion-Bertsch formula for soft gluon radiation

observed in experiments at RHIC and LHC energy. We point out that for the same

Elliptic flow of thermal dileptons as a probe of QCD matter

R_{AA}(p_T)

Propagation of heavy baryons in heavy-ion collisions

one can generate 2-3 times more

Nonconformal holographic model for D-meson suppression at energies available at the CERN Large Hadron Collider

v_2