Searching for possible evidences of new physics in $B\to V_1 V_2$

Abstract

We explore the decays of $B\to V_1V_2$ ($V_{1,2}= (ρ, ω,K^*, ϕ)$ and $B= (B^0, B^+,B_s)$) with transverse polarizations. We explicitly evaluate the eigenstates of T-odd scalar operators involving spins for the first time, which offer physical insight among the T violating observables. Based on the helicity suppression of tree operators for transverse polarizations in the standard model (SM), we deduce that $Δϕ_p= Δϕ_\parallel - Δϕ_\perp=0$ with $Δϕ_{\perp,\parallel}$ the weak phases of the transverse amplitudes. In contrast, the experiments show that $Δϕ_p (B^0 \to K^{*0} ω)= -0.84\pm 0.54$, which could be a signal of new physics. There is also a discrepancy between our result in the SM and the experimental data for the transverse polarized branching ratio in $B^0 \to K^{*0} ω$. In addition, by counting the helicity flips, we argue that $\sin(ϕ_\parallel - ϕ_\perp ) \approx 0$, which meets well with most of the experiments except for the ones with $B^0\to K^{*0}ω$, where $ϕ_{\parallel,\perp}$ are the strong phases in the transverse amplitudes.