Spacetime profile of electromagnetic fields in intermediate-energy heavy-ion collisions

I numerically estimate the spacetime profile of the electromagnetic fields produced in intermediate-energy heavy-ion collisions at <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:msqrt><a:msub><a:mi>s</a:mi><a:mrow><a:mi>N</a:mi><a:mi>N</a:mi></a:mrow></a:msub></a:msqrt><a:mo>=</a:mo><a:mn>2.4</a:mn><a:mtext>–</a:mtext><a:mn>7.7</a:mn><a:mspace width="0.28em"/><a:mi>GeV</a:mi></a:mrow></a:math> for a wide range of impact parameters <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:mi>b</c:mi><c:mo>=</c:mo><c:mn>0</c:mn><c:mtext>–</c:mtext><c:mn>9</c:mn><c:mspace width="0.28em"/><c:mi>fm</c:mi></c:mrow></c:math>, using a hadronic cascade model, (Jet AA Microscopic transport model). I demonstrate that (1) the produced electromagnetic fields are as strong as <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"><e:mrow><e:mi>e</e:mi><e:mi>E</e:mi><e:mo>,</e:mo><e:mi>e</e:mi><e:mi>B</e:mi><e:mo>=</e:mo><e:mi>O</e:mi><e:mrow><e:mo>(</e:mo></e:mrow><e:msup><e:mrow><e:mo>(</e:mo><e:mn>50</e:mn><e:mspace width="0.28em"/><e:mi>MeV</e:mi><e:mo>)</e:mo></e:mrow><e:mn>2</e:mn></e:msup><e:mrow><e:mo>)</e:mo></e:mrow></e:mrow></e:math>; (2) that the produced fields extend in spacetime about <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"><g:mrow><g:msub><g:mi>V</g:mi><g:mn>4</g:mn></g:msub><g:mo>=</g:mo><g:mi>O</g:mi><g:mrow><g:mo>(</g:mo></g:mrow><g:msup><g:mrow><g:mo>(</g:mo><g:mn>10</g:mn><g:mspace width="0.28em"/><g:mi>fm</g:mi><g:mo>)</g:mo></g:mrow><g:mn>4</g:mn></g:msup><g:mrow><g:mo>)</g:mo></g:mrow></g:mrow></g:math>; (3) that the magnetic field dominates around the collision point, while the other broad regions of spacetime are dominated by the electric field; and (4) that a topological electromagnetic-field configuration such that <i:math xmlns:i="http://www.w3.org/1998/Math/MathML"><i:mrow><i:mi mathvariant="bold-italic">E</i:mi><i:mo>·</i:mo><i:mi mathvariant="bold-italic">B</i:mi><i:mo>≠</i:mo><i:mn>0</i:mn></i:mrow></i:math> is realized.