2002/04/30 by Yuval Grossman, Alexander L. Kagan, Zoltan Ligeti · 32 citations
Chemistry · Medicine · Physics and Astronomy · #Chemistry #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0370-2693(02)02027-0
published in Physics Letters B 538(3-4), 327-334 (Elsevier BV) · 13 pages, revtex4. Minor changes. Version to appear in PLB
arxiv created 2002/06/11 · openalex publication_date 2002/07/01 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the standard model the CP asymmetries in B→ ψKS and B→ ψKL are equal in magnitude and opposite in sign to very good approximation. We compute the order εK corrections to each of these CP asymmetries and find that they give a deviation from sin 2β at the half percent level, which may eventually be measurable. However, the correction to aCP(B→ ψKS)+aCP(B→ ψKL) due to εK is further suppressed. The dominant corrections to this sum, at the few times 10-3 level, come from the B lifetime difference, and CP violation in B- B mixing and B → ψK decay. New physics could induce a significant difference in the sin(ΔmB t) time dependence in the asymmetries if and only if the "wrong-flavor" amplitudes B → ψ K or B → ψK are generated. A scale of new physics that lies well below the weak scale would be required. Potential scenarios are therefore highly constrained, and do not appear feasible. A direct test is proposed to set bounds on such effects.