The hexadecapole component of Δγ(φ_pair) is proposed as a CME-sensitive and background-insensitive observable based on magnetic field fluctuations in heavy-ion collision models.
Azimuthally fluctuating magnetic field and its impacts on observables in heavy-ion collisions
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abstract
The heavy-ion collisions can produce extremely strong transient magnetic and electric fields. We study the azimuthal fluctuation of these fields and their correlations with the also fluctuating matter geometry (characterized by the participant plane harmonics) using event-by-event simulations. A sizable suppression of the angular correlations between the magnetic field and the 2nd and 4th harmonic participant planes is found in very central and very peripheral collisions, while the magnitudes of these correlations peak around impact parameter b~8-10 fm for RHIC collisions. This can lead to notable impacts on a number of observables related to various magnetic field induced effects, and our finding suggests that the optimal event class for measuring them should be that corresponding to b~8-10 fm.
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The review summarizes developments in spin hydrodynamics, polarization from spin-vorticity coupling, pseudo-gauge freedom, and heavy-flavor spin dynamics in relativistic systems.
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A higher-harmonic observable for the chiral magnetic effect in heavy-ion collisions
The hexadecapole component of Δγ(φ_pair) is proposed as a CME-sensitive and background-insensitive observable based on magnetic field fluctuations in heavy-ion collision models.
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Spin dynamics and polarization in relativistic systems: recent developments
The review summarizes developments in spin hydrodynamics, polarization from spin-vorticity coupling, pseudo-gauge freedom, and heavy-flavor spin dynamics in relativistic systems.