Angular distributions in the decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:msup><mml:mi>l</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>l</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>

We use a sample of $384\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ events collected with the BABAR detector at the PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ collider to study angular distributions in the rare decays $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$, where ${\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ is either ${e}^{+}{e}^{\ensuremath{-}}$ or ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. For low dilepton invariant masses, ${m}_{\ensuremath{\ell}\ensuremath{\ell}}&lt;2.5\text{ }\text{ }\mathrm{GeV}/{c}^{2}$, we measure a lepton forward-backward asymmetry ${\mathcal{A}}_{\mathrm{FB}}={0.24}_{\ensuremath{-}0.23}^{+0.18}\ifmmode\pm\else\textpm\fi{}0.05$ and ${K}^{*}$ longitudinal polarization ${F}_{L}=0.35\ifmmode\pm\else\textpm\fi{}0.16\ifmmode\pm\else\textpm\fi{}0.04$. For ${m}_{\ensuremath{\ell}\ensuremath{\ell}}&gt;3.2\text{ }\text{ }\mathrm{GeV}/{c}^{2}$, we measure ${\mathcal{A}}_{\mathrm{FB}}={0.76}_{\ensuremath{-}0.32}^{+0.52}\ifmmode\pm\else\textpm\fi{}0.07$ and ${F}_{L}={0.71}_{\ensuremath{-}0.22}^{+0.20}\ifmmode\pm\else\textpm\fi{}0.04$.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.