Charge asymmetry in high-energy μ+μ- photoproduction in the electric field of a heavy atom

E. J. Downie, R. N. Lee, A. I. Milstein*, G. Ron

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The charge asymmetry in the differential cross section of high-energy μ+μ- photoproduction in the electric field of a heavy atom is obtained. This asymmetry arises due to the Coulomb corrections to the amplitude of the process (next-to-leading term with respect to the atomic field). The deviation of the nuclear electric field from the Coulomb field at small distances is crucially important for the charge asymmetry. Though the Coulomb corrections to the total cross section are negligibly small, the charge asymmetry is measurable for selected final states of μ+ and μ-. We further discuss the feasibility for experimental observation of this effect.

Original languageAmerican English
Pages (from-to)645-649
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume728
DOIs
StatePublished - 2014

Bibliographical note

Funding Information:
The work of R.N.L. and A.I.M. has been supported in part by the Ministry of Education and Science of the Russian Federation . This work has also been funded, in part, by the US National Science Foundation (Grant No. 1309130 ). A.I.M. thanks the Lady Davis Fellowship Trust and the Racah Institute of Physics at the Hebrew University of Jerusalem for financial support and kind hospitality.

Keywords

  • Charge asymmetry
  • Coulomb corrections

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