POLARIZATION IN ${{\boldsymbol B}_{{c}}^{+}}$ 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 _{\perp}/\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$_{P}({{\boldsymbol B}_{{c}}^{+}}$) INSPIRE search

A$_{P}({{\mathit B}_{{c}}^{+}}$) = [${\mathit \sigma (}{{\mathit B}_{{c}}^{-}}{)}$ $−$ ${\mathit \sigma (}{{\mathit B}_{{c}}^{+}}{)}$] $/$ [${\mathit \sigma (}{{\mathit B}_{{c}}^{-}}{)}$ $+$ ${\mathit \sigma (}{{\mathit B}_{{c}}^{+}}{)}$]
VALUE ($ 10^{-2} $) DOCUMENT ID TECN  COMMENT
$\bf{ -1.0 \pm1.0}$ OUR AVERAGE
$-2.5$ $\pm2.1$ $\pm0.5$ 1
AAIJ
2019AI
LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$-0.5$ $\pm1.1$ $\pm0.4$ 1
AAIJ
2019AI
LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
1  Measured using ${{\mathit B}_{{c}}^{+}}$ semileptonic decays.
  References:
AAIJ 2019AI
PR D100 112006 Measurement of the $B_c^-$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions