#### ${{\mathit D}_{{0}}{(2550)}^{0}}$ POLARIZATION AMPLITUDE A$_{{{\mathit D}_{{J}}} }$

A polarization amplitude A$_{{{\mathit D}_{{J}}} }$ is a parameter that depends on the initial polarization of the ${{\mathit D}_{{J}}}$ . For ${{\mathit D}_{{J}}}$ decays the helicity angle, ${{\mathit \theta}_{{H}}}$ , distribution varies like 1 + A$_{{{\mathit D}_{{J}}} }$ cos $^2{{\mathit \theta}_{{H}}}$, where ${{\mathit \theta}_{{H}}}$ is the angle in the ${{\mathit D}_{{J}}}$ rest frame between the two pions emitted in the ${{\mathit D}_{{J}}}$ $\rightarrow$ ${{\mathit D}^{*}}{{\mathit \pi}}$ and ${{\mathit D}^{*}}$ $\rightarrow$ ${{\mathit D}}{{\mathit \pi}}$ decays.
VALUE EVTS DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$4.2$ $\pm1.3$ 60k 1
 2013 CC
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit X}}$
 1 Systematic uncertainty not estimated.
References:
 AAIJ 2013CC
JHEP 1309 145 Study of ${{\mathit D}_{{J}}}$ Meson Decays to ${{\mathit D}^{+}}{{\mathit \pi}^{-}}$ , ${{\mathit D}^{0}}{{\mathit \pi}^{+}}$ and ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ Final States in ${{\mathit p}}{{\mathit p}}$ Collisions