We present the new results of measurements of the exclusive
cross sections of the $e^+ e^-$ annihilation to charmed meson pairs
as a function of the center-of-mass energy from the
open-charm
threshold up to $\sqrt{s}=6$ GeV using initial state radiation
technique. The analysis is based on the data sample collected by the
Belle detector with an integrated luminosity of 951 fb$^{-1}$. The
accuracy of the cross section measurement is increased by a factor
of 2 in comparison with the first Belle study. We have performed the
first angular analysis of the $e^+e^- \to D^{* \pm} D^{* \mp}$
process and decomposed this exclusive cross section into three
components corresponding to the different $D^*$ helicities.
Angular analysis of the $e^{+}e^{-} \to D^{(*)}D^{*}$ process near the open-charm threshold using initial-state radiation at Belle
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Published on:
February 08, 2021
Abstract
DOI: https://doi.org/10.22323/1.360.0013
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.