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POLARIZATION IN ${{\mathit B}_{{c}}^{+}}$ 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.

$\Gamma _{L}/\Gamma $ in ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}_{{s}}^{*+}}$

INSPIRE   PDGID:

S091FL1

VALUE DOCUMENT ID TECN  COMMENT $\bf{ 0.34 \pm0.09}$ OUR AVERAGE $0.30$ $\pm0.10$ $\pm0.04$ 1, 2 AAD 2022 O ATLS ${{\mathit p}}{{\mathit p}}$ at 13 TeV $0.48$ $\pm0.20$ 3 AAIJ 2013 AS LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV • • We do not use the following data for averages, fits, limits, etc. • • $0.62$ $\pm0.24$ 4 AAD 2016 H ATLS ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV 1  Supersedes the measurement of AAD 2016H. 2  AAD 2022O measures 1 $−$ $\Gamma _{L}/\Gamma $ = $0.70$ $\pm0.10$ $\pm0.04$. 3  AAIJ 2013AS measures 1 $−$ $\Gamma _{L}/\Gamma $ = $0.52$ $\pm0.20$. 4  AAD 2016H measures 1 $−$ $\Gamma _{L}/\Gamma $ = $0.38$ $\pm0.24$.

References:

AAD 2022O JHEP 2208 087 Study of $ {\mathrm{B}}_{\mathrm{c}}^{+}\to \mathrm{J}/\psi {\mathrm{D}}_{\mathrm{s}}^{+} $ and $ {\mathrm{B}}_{\mathrm{c}}^{+}\to \mathrm{J}/\psi {\mathrm{D}}_{\mathrm{s}}^{\ast +} $ decays in pp collisions at $ \sqrt{\mathrm{s}} $ = 13 TeV with the ATLAS detector AAD 2016H EPJ C76 4 Study of the ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$ and ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}_{{s}}^{*+}}$ Decays with the ATLAS Detector AAIJ 2013AS PR D87 112012 Observation of ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}_{{s}}^{+}}$ and ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}^{*+}_{s}}$ Decays Also PR D89 019901 (errat.) Publisher's Note : Observation of ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}_{{s}}^{+}}$ and ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit D}^{*+}_{s}}$ Decays [Phys. Rev. D 87, 112012 (2013)]

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