Wake potential in collisional anisotropic quark-gluon plasma

Abstract

Within the framework of Boltzmann transport equation with a Bhatnagar-Gross-Krook (BGK) collisional kernel, we study the wake potential induced by fast partons traveling through the high-temperature QCD plasma which is anisotropic in momentum-space. We calculate the dielectric response function of a collisional anisotropic quark-gluon plasma (AQGP) for small $\xi$ (anisotropic parameter) limit. Using this, the wake potential for various combinations of the anisotropy parameter ($\xi$) and the collision rate ($\nu$) is evaluated both for parallel and perpendicular directions of motion of the fast parton. It is seen that the inclusion of the collision modifies the wake potential and the amount as well as the nature of the potential depends on the combinations of $\xi$ and $\nu$Comment: 11 pages, 4 figure

Ultracold ions wake in dusty plasmas

“…without breaking it to aggregated parts) making it more elongated along flow direction without significant shrinking in transverse direction (see figures 1(f)-(h)). Though the inverse V shape of the wake potential is similar to the one observed in quark-gluon plasmas and warm dense matter [30][31][32], the profile of wake density is quite different. An important aspect is that even in the equilibrium case, M th =0, one can see from figure 1(e) that the plasma polarization around dust particles is not spherically uniform.…”

“…We observe inverse V shape pattern of the wakefield similar to the one observed in simulations for quark-gluon plasma and dense quantum plasma wakes(e.g. see [30][31][32]). Additionally, at M th =5 and M th =10 (see figures 1(c) and (d)), in transverse to ion flux direction the wakefield develops the region characterized by the attraction between dust particles.…”

Dynamical Screening and Wake Effects in Classical, Quantum, and Ultrarelativistic Plasmas

“…8(b). The finding that a finite collision rate can enhance the attractive and repulsive parts of the interaction potential behind a fast parton in a QGP was reported in [14] and recently confirmed [15]. Intuitively, interestingly, the potential amplitude should be damped (reduced) when finite collisions are taken in account as seen for the classical system, Fig.…”

“…5, there is beside the repulsive short-range part only a very shallow attractive longe-range potential part in the non-classical systems. The form of these wakes resembles the Lennard-Jones potential [13,15,28]. In contrast, the trailing potential peak in the classical case is even increased by 43 percent and the wakefield is revealing higher frequency oscillations compared to M = 0.99.…”

“…Analogies, but also identified differences may be of direct importance for various fields, where a deviation from the static Yukawa potential due to streaming effects can be expected. Examples include dense plasmas in warm dense matter and condensed matter physics, ion beam physics [5][6][7][8][9][10][11][12] as well as hot electron-positron and quark-gluon plasmas (QGP) [13][14][15][16][17].…”