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.

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

INSPIRE   JSON  (beta) PDGID:
S042PP1
VALUE (rad) DOCUMENT ID TECN  COMMENT
$\bf{ -2.92 \pm0.04}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$-2.94$ $\pm0.02$ $\pm0.03$
AAIJ
2013AT
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$-2.69$ $\pm0.08$ $\pm0.11$ 1
ABAZOV
2009E
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
$-2.93$ $\pm0.08$ $\pm0.04$ 2
AUBERT
2007AD
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Obtained $\phi _{\parallel}$ as $\delta _{2}−\delta _{1}$, assuming they are uncorrelated.
2  Obtained by combining the ${{\mathit B}^{0}}$ and ${{\mathit B}^{+}}$ modes.

           $\phi _{\parallel}$ in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{*0}}$ (rad)
References