POLARIZATION IN ${{\mathit B}^{0}}$ DECAY

In decays involving two vector mesons, one can distinguish among the states in which meson polarizations are both longitudinal ($\mathit L$) or both are transverse and parallel ($\parallel$) or perpendicular ($\perp$) to each other with the parameters $\Gamma _{L}/\Gamma $, $\Gamma _{}/\Gamma $, and the relative phases $\phi _{\parallel}$ and $\phi _{\perp}$. See the definitions in the note on “Polarization in ${{\mathit B}}$ Decays” review in the ${{\mathit B}^{0}}$ Particle Listings.

A${}^{Re}_{T}$ in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{*}{(892)}^{0}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ (at low q${}^{2}$)

INSPIRE   JSON  (beta) PDGID:
S042P11
Related to A$_{FB}$, F$_{L}$ by A${}^{Re}_{T}$ = (4/3) A$_{FB}$ $/$ (1 $−$ F$_{L}$).
VALUE DOCUMENT ID TECN  COMMENT
$-0.06$ $\pm0.08$ $\pm0.02$ 1
AAIJ
2020AO
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$0.10$ $\pm0.18$ $\pm0.05$ 2
AAIJ
2015Z
 LHCB Repl. by AAIJ 2020AO
1  Determined in the effective dielectron invariant mass range 0.0008$<$q${}^{2}<$0.257GeV${}^{2}$/c${}^{4}$.
2  Determined in the effective dielectron invariant mass range $0.002<$q${}^{2}<1.120$ GeV${}^{2}$/c${}^{4}$.
References