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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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abstract
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.
Forward citations
Cited by 2 Pith papers
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Asymmetric muon-antimuon emission from $Z^0$ decays: a clear magnetometer in relativistic heavy-ion collisions
A proposal that Z0 to mu+ mu- decays in a strong magnetic field produce negative v2 and harder antimuon pT, offering a potential early-field magnetometer.
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The influence of electromagnetic fields on the generation of the directed and elliptic flows of heavy quark in relativistic heavy-ion collisions
In the PHSD transport model, self-generated electromagnetic fields induce a D meson v1 splitting consistent with STAR within large uncertainties, and a more visible v1 splitting versus pT for charm quarks.
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