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Exploring the effects of electromagnetic fields and tilted bulk distribution on directed flow of D mesons in small systems

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arxiv 2304.12792 v2 pith:SJQ3W4VO submitted 2023-04-25 nucl-th hep-exhep-ph

Exploring the effects of electromagnetic fields and tilted bulk distribution on directed flow of D mesons in small systems

Yifeng Sun , Salvatore Plumari , Santosh K. Das This is my paper
classification nucl-th hep-exhep-ph
keywords directedflowelectromagneticquarkssmallsystemsbulkcollisions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We studied the directed flow of heavy quarks in small systems produced in p-Pb collisions due to both the impact of initial vorticity and electromagnetic fields. We employed a relativistic transport code to model the bulk evolution of the small systems and studied the heavy quark momentum evolution using Langevin dynamics. For the heavy quarks interaction with the bulk, we employed a quasiparticle model (QPM). We observed a large directed flow splitting ($\Delta v_1$) of charm quarks due to electromagnetic fields, which is comparable to the directed flow splitting of charm quarks in nucleus-nucleus collisions. However, the magnitude of the directed flow due to the initial tilted matter distribution in p-nucleus collisions is not substantial. The observed directed flow is not rapidity odd due to the asymmetry in the colliding system. The results presented in this manuscript provide an independent way to quantify the initial electromagnetic field produced and the matter distributed in small systems.

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Cited by 2 Pith papers

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  1. Memory effect on the heavy quark dynamics in hot QCD matter

    hep-ph 2026-04 unverdicted novelty 5.0

    Time-correlated thermal noise modeled with a fractional derivative substantially alters heavy quark momentum correlations, displacement, and transverse-momentum moments in hot QCD matter.

  2. Sensitivity of Heavy-Quark Dipolar Flow to its Initial Spatial Distributions in Cu+Au Collisions

    nucl-th 2026-05 unverdicted novelty 4.0

    In Cu+Au collisions, heavy-quark directed flow is an order of magnitude larger than charged-hadron flow and shows strong sensitivity to initial spatial distributions and temperature-dependent drag.