Ratios of bottom meson branching fractions involving J/psi mesons and determination of b quark fragmentation fractions

TL;DR

This paper measures the ratios of bottom meson decay rates involving J/psi mesons and uses these to determine b quark fragmentation fractions, providing insights into B meson decay mechanisms.

Contribution

It introduces new measurements of B meson decay ratios and b quark fragmentation fractions from collider data, enhancing understanding of B meson decay models.

Findings

Measured decay rate ratios for B^+, B^0, B_s^0 mesons

Determined b quark fragmentation fractions f_u, f_d, f_s

Provided branching fractions for specific B decay modes

Abstract

We report a measurement of the ratios of the decay rates of the B^+, B^0 and B^0_s mesons into exclusive final states containing a J/psi meson. The final states were selected from 19.6 pb^{-1} of p-pbar collisions recorded by the Collider Detector at Fermilab. These data are interpreted to determine the bquark fragmentation fractions f_u, f_d and f_s. We also determine the branching fractions for the decay modes B^+ --> J/psi K^+, B^+ --> J/psi K^*(892)^+, B^0 --> J/psi K^0, B^0 --> J/psi K^*(892)^0 and B_s^0 --> J/psi phi(1020). We discuss the implications of these measurements to B meson decay models.