Abstract
Rapidity-odd directed flow in heavy ion collisions can originate from two very distinct sources in the collision dynamics i. an initial tilt of the fireball in the reaction plane that generates directed flow of the constituents independent of their charges, and ii. the Lorentz force due to the strong primordial electromagnetic field that drives the flow in opposite directions for constituents carrying unlike sign charges. We study the directed flow of open charm mesons D0 and D0‾ in the presence of both these sources of directed flow. The drag from the tilted matter dominates over the Lorentz force resulting in same sign flow for both D0 and D0‾, albeit of different magnitudes. Their average directed flow is about ten times larger than their difference. This charge splitting in the directed flow is a sensitive probe of the electrical conductivity of the produced medium. We further study their beam energy dependence; while the average directed flow shows a decreasing trend, the charge splitting remains flat from sNN=60 GeV to 5 TeV.
Highlights
A strongly interacting medium is expected to be formed in relativistic heavy ion collisions
Heavy quarks (HQs) by virtue of being several times more massive than the highest ambient temperatures achieved in a collision are expected to be produced only in primordial collisions
Within the framework of Langevin dynamics coupled to a hydrodynamic background, it has been shown that this difference between the bulk matter and the HQ production points can lead to HQ v1 that is of same sign as the bulk but several times larger [17]
Summary
A strongly interacting medium is expected to be formed in relativistic heavy ion collisions. We calculate the directed flow coefficient v1 of D0 and D0 mesons under the combined influence of the drag from the tilted source and the EM fields. The symmetry of the problem is such that the only relevant components for the computation of the directed flow are By and Ex. The calculation of the time dependent EM field follows Refs.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
