2004/04/13 by B. Ananthanarayan, Saurabh D. Rindani, Ritesh K. Singh +1 · 4 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/j.physletb.2004.04.067
published as Phys.Lett. B593 (2004) 95-104; Erratum-ibid. B608 (2005) 274-275 · 13 pages, latex, 7 figures included as postscript
arxiv created 2004/04/13 · openalex publication_date 2004/06/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We show that an anomalous CP-violating γγZ vertex gives rise to a novel asymmetry with transversely polarized electron and positron beams in the process e+e−→γZ. This asymmetry, which is odd under naive time reversal, is proportional to the real part of the γγZ CP-violating coupling. This is in contrast to the simple forward–backward asymmetry of the γ (or Z) with unpolarized or longitudinally polarized beams studied earlier, which is even under naive time reversal, and is proportional to the imaginary part. We estimate the sensitivity of future experiments to the determination of CP-odd γγZ and γZZ couplings using these asymmetries and transversely polarized beams.