Speaker
Description
We investigate quark spin precession as a probe of the magnetic field produced in heavy-ion collisions (HICs). The magnetic field induces Larmor precession of quarks, while the opposite charges of quarks and antiquarks result in characteristic charge-dependent spin rotations. We demonstrate this mechanism through polarization splitting between $\Lambda$ and $\bar{\Lambda}$ hyperons and extend the framework to charm and bottom quarks propagating through an expanding quark–gluon plasma medium. In the heavy-flavor sector, the accumulated precession phase is sensitive to the time-dependent magnetic field and, consequently, its lifetime, leading to characteristic polarization differences between $\Lambda_c^+$–$\bar{\Lambda}_c^-$ and $\Lambda_b^0$–$\bar{\Lambda}_b^0$. The complementary sensitivity of light and heavy flavors provides a unified spin-based framework for probing the magnitude and space-time evolution of magnetic fields in HICs. Our results highlight quark spin precession and charge-odd hadron polarization as observables for exploring magnetic field dynamics in hot QCD matter in heavy-ion collisions.