Large two-loop contributions to [Formula Presented] from a generic pseudoscalar boson

Darwin Chang, We Fu Chang, Chung Hsien Chou, Wai Yee Keung

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We calculate the dominant contributions to the muon (Formula presented) at the two-loop level due to a generic pseudoscalar boson that may exist in any exotic Higgs sector in most extensions of the standard model. The leading effect comes from diagrams of the Barr-Zee type. A sufficiently light pseudoscalar Higgs boson can give rise to contributions as large as the electroweak contribution which is measurable in the next round of (Formula presented) experiments. Through the contribution we calculate here, the anticipated improved data in the recent future on the muon (Formula presented) can put the best limit on the possible existence of a light pseudoscalar boson in physics beyond the standard model.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number9
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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