We study the CP asymmetry of B±→ ωK± with the inclusion of the ρ − ω mixing mechanism. It is shown that the CP asymmetry of B±→ ωK± experimentally measured (ACPexp) and conventionally defined (ACPcon) are in fact different, which relation can be illustrated as ACPexp=ACPcon+ΔACPρω, with ΔACPρω the ρ − ω mixing contribution to ACPexp. The numerical value of ΔACPρω is extracted from the experimental data of B±→ π+π−K± and is found to be comparable with ACPexp, hence, non-negligible. The conventionally defined CP asymm...
