The electron energy spectrum in muon decay through O;(α2)

Charalampos Anastasiou*, Kirill Melnikov, Frank Petriello

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


We compute the complete (α2) QED corrections to the electron energy spectrum in unpolarized muon decay, including the full dependence on the electron mass. Our calculation reduces the theoretical uncertainty on the electron energy spectrum well below 10-4, the precision anticipated by the TWIST experiment at TRIUMF, which is currently performing this measurement. For this calculation, we extend techniques we have recently developed for performing next-to-next-to-leading order computations to handle the decay spectra of massive particles. Such an extension enables further applications to precision predictions for b, t, and Higgs differential decay rates.

Original languageEnglish (US)
Article number014
JournalJournal of High Energy Physics
Issue number9
StatePublished - Sep 1 2007


  • NLO computations
  • Weak decays

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'The electron energy spectrum in muon decay through O;(α2)'. Together they form a unique fingerprint.

Cite this