2003/11/30 by A. Giri, A. K. Giri, R. Mohanta +1 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1142/s021773230401518x
published as Mod.Phys.Lett. A19 (2004) 1903-1918 · 17 pages, 2 figures, typos corrected, more references added, to be published in Modern Physics Letters A
arxiv created 2004/06/29 · openalex publication_date 2004/08/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the direct CP violation effect in the decay mode B + →ϕK + . This decay mode is dominated by the loop induced [Formula: see text] penguin diagram with a tiny contribution from the annihilation diagram. Therefore, the standard model expectation of direct CP violation is negligibly small. Using QCD factorization approach we find the CP asymmetry in the standard model to be at percent level. We consider then two scenarios beyond the standard model, the model with an extra vector-like down quark (VLDQ) and the R-parity violating supersymmetric model (RPV) and show that the direct CP violating asymmetry in B + →ϕK + could be as large as ~ 85% (70%) in VLDQ (RPV) model.