In hadron colliders, such as at the Large Hadron Collider in CERN, heavy-ion collision experiments have over the past two decades been able to create a plasma of elementary particles called the quark-gluon plasma. This type of plasma filled the universe just a few millionths of a second after the big bang. In an off-central heavy-ion collision, an extremely strong magnetic field is created in the center of the plasma. This strong magnetic field is initially perpendicular to the plane of the quark-gluon plasma collision. However, due to the chiral magnetic effect, it is possible that after the collision, magnetic field is also induced in other directions. Using magnetohydrodynamics, which is a theory that studies the behavior of an electrically conductive fluid in a magnetic field, we calculate the magnitude of the magnetic field in different directions, estimate how quickly the field decays, and thereby understand how long appreciable magnetic fields persist in the plasma. Moreover, we also show how this magnetic field depends on the electrical conductivity and the chiral magnetic conductivity.
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