Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electroweak monopoles and the electroweak phase transition   We consider an isolated electroweak monopole solution within the Standard
Model with a non-linear Born-Infeld extension of the hypercharge gauge field.
Monopole (and dyon) solutions in such an extension are regular and their masses
are predicted to be proportional to the Born-Infeld mass parameter. We argue
that cosmological production of electroweak monopoles may delay the electroweak
phase transition and make it more strongly first order for monopole masses
$M\gtrsim 9.3\cdot 10^3$ TeV, while the nucleosynthesis constraints on the
abundance of relic monopoles impose the bound $M\lesssim 2.3\cdot 10^4$ TeV.
The monopoles with a mass in this shallow range may be responsible for the
dynamical generation of the matter-antimatter asymmetry during the electroweak
phase transition.

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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio