Indirect signatures of CP violation in the processes γγ→γγ, γZ, and ZZ

JoAnne L. Hewett, Frank J. Petriello

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This paper studies the utility of the processes γγ→γγ, γZ, and ZZ in searching for sources of CP violation arising from energy scales beyond the production thresholds of planned future colliders. In the context of an effective Lagrangian approach we consider the most general set of CP odd SU(2)X U(1) operators that give rise to genuinely quartic gauge boson couplings which can be probed in 2→2 scattering processes at a γγ collider. We study each process in detail, emphasizing the complementary information that is obtained by varying the initial beam polarizations. Finally, we compare our results to other constraints in the literature on CP odd gauge boson interactions and quartic gauge boson couplings; the search reaches obtained here are typically stronger and nicely complement previous studies which have focused primarily on W boson, top quark, or Higgs boson production.

Original languageEnglish (US)
Article number095017
JournalPhysical Review D
Issue number9
StatePublished - Nov 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Indirect signatures of CP violation in the processes γγ→γγ, γZ, and ZZ'. Together they form a unique fingerprint.

Cite this