Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments About the Electromagnetic Field in Heavy-Ion Collisions   In this short article we discuss the properties of electromagnetic fields in
heavy-ion collisions and consequences for observables. We address
quantitatively the issue of the magnetic field lifetime in a collision
including the electric and chiral magnetic conductivities. We show that for
reasonable parameters, the magnetic field created by spectators in a collision
is not modified by the presence of matter. Based on this, we draw definite
conclusions on observed effects in heavy-ion collisions.

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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: physics