High-energy $\mu^+\mu^-$ electroproduction

TL;DR

This paper provides an exact calculation of high-energy muon pair and paradimuonium production cross sections in atomic fields, highlighting significant Coulomb correction effects on differential cross sections and observable asymmetries.

Contribution

It offers a precise analysis of Coulomb corrections in muon pair production, revealing their impact on differential cross sections and asymmetries, which was not previously detailed.

Findings

Coulomb corrections to differential cross sections are large.

Coulomb corrections to total cross sections are negligible.

Cross section asymmetry with respect to muon momenta permutation is significant.

Abstract

The cross sections of high-energy $\mu^+\mu^-$ pair production and paradimuonium production by a relativistic electron in the atomic field are discussed. The calculation is performed exactly in the parameters of the atomic field. Though the Coulomb corrections to the cross sections, related to the multiple Coulomb exchange of $\mu^+,\,\mu^-$ and an atom, are negligible, the Coulomb corrections to the differential cross sections, related to the electron interaction with an atom, are large. However, the latter Coulomb corrections to the cross sections integrated over the final electron momentum are small. Apparently, this effect can easily be observed experimentally. Furthermore, it is shown that the asymmetry of the cross section with respect to the permutation of the momenta of $\mu^-$ and $\mu^+$ is large.