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 _{\mathit L}/\Gamma $ in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \rho}^{+}}{{\mathit \rho}^{-}}$

INSPIRE   JSON  (beta) PDGID:
S042P6
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.990 {}^{+0.021}_{-0.019}}$ OUR AVERAGE
$0.988$ $\pm0.012$ $\pm0.023$
VANHOEFER
2016
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.992$ $\pm0.024$ ${}^{+0.026}_{-0.013}$
AUBERT
2007BF
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$0.941$ ${}^{+0.034}_{-0.040}$ $\pm0.030$
SOMOV
2006
BELL Repl. by VANHOEFER 2016
$0.978$ $\pm0.014$ ${}^{+0.021}_{-0.029}$
AUBERT,B
2005C
BABR Repl. by AUBERT 2007BF
$0.98$ ${}^{+0.02}_{-0.08}$ $\pm0.03$
AUBERT
2004G
BABR Repl. by AUBERT,B 2004R
$0.99$ $\pm0.03$ ${}^{+0.04}_{-0.03}$
AUBERT,B
2004R
BABR Repl. by AUBERT,B 2005C
References