Measurement of the angular and lifetime parameters of the decays $B_{d}^{0}\to J/\psi K^{*0}$ and $B_{s}^{0}\to J/\psi\phi$

TL;DR

This paper reports measurements of angular and lifetime parameters in specific B meson decays, testing flavor symmetry and factorization assumptions with data from the D0 detector.

Contribution

It provides the first measurements of polarization amplitudes, phases, and lifetimes for these decays, challenging existing theoretical assumptions.

Findings

No evidence for deviation from flavor SU(3) symmetry.

Factorization assumption not valid for Bd0→J/ψK*0 decay.

Measured lifetime ratio of Bs0 to Bd0.

Abstract

We present measurements of the linear polarization amplitudes and the strong relative phases that describe the flavor-untagged decays $B_{d}^{0}\to J/\psi K^{*0}$ and $B_{s}^{0}\to J/\psi\phi$ in the transversity basis. We also measure the mean lifetime $\bar{\tau}_{s}$ of the $B_{s}^{0}$ mass eigenstates and the lifetime ratio $\bar{\tau}_{s}/\tau_{d}$. The analyses are based on approximately 2.8 fb$^{-1}$ of data recorded with the D0 detector. From our measurements of the angular parameters we conclude that there is no evidence for a deviation from flavor SU(3) symmetry for these decays and that the factorization assumption is not valid for the $B_{d}^{0}\to J/\psi K^{*0}$ decay.