Solutions to the Rb, Rc, and αs puzzles by vector fermions

Chia Hung V. Chang, Darwin Chang, Wai Yee Keung

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We propose two minimal extensions of the standard model, both of which can accommodate the recent puzzling observations about the excess in Rb and the deficit in Rc. The discrepancy in the low energy and high energy determinations of αs can be resolved in the second model. Each model requires three additional heavy vectorial fermions. The current phenomenological constraints and the new potential phenomena are also discussed.

Original languageEnglish
Pages (from-to)7051-7056
Number of pages6
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number11
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

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


Dive into the research topics of 'Solutions to the Rb, Rc, and αs puzzles by vector fermions'. Together they form a unique fingerprint.

Cite this