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.

$\Gamma _{\perp}/\Gamma $ in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$

INSPIRE   JSON  (beta) PDGID:
S042PP0
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.211 \pm0.008}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$0.201$ $\pm0.004$ $\pm0.008$
AAIJ
2013AT
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$0.230$ $\pm0.013$ $\pm0.025$ 1
ABAZOV
2009E
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$0.233$ $\pm0.010$ $\pm0.005$ 2
AUBERT
2007AD
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.215$ $\pm0.032$ $\pm0.006$
ACOSTA
2005
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$0.195$ $\pm0.012$ $\pm0.008$
ITOH
2005
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Measured the angular and lifetime parameters for the time-dependent angular untagged decays ${{\mathit B}_{{{d}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$ and ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$.
2  Obtained by combining the ${{\mathit B}^{0}}$ and ${{\mathit B}^{+}}$ modes.

           $\Gamma _{\perp}/\Gamma $ in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$
References