Measurement of the energy dependence of the e+e− → $$ B\overline{B} $$, $$ B{\overline{B}}^{\ast } $$, and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ cross sections at Belle II
Copyright policy )Measurement of the energy dependence of the e+e− → $$ B\overline{B} $$, $$ B{\overline{B}}^{\ast } $$, and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ cross sections at Belle II
Abstract We report measurements of the e + e − → $$ B\overline{B} $$ B B ¯ , $$ B{\overline{B}}^{\ast } $$ B B ¯ ∗ , and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle II experiment. We reconstruct one B meson in a large number of hadronic final states and use its momentum to identify the production process. In the first 2 – 5 MeV above $$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ threshold, the e + e − → $$ {B}^{\ast }{\overline{B}}^{\ast } $$ B ∗ B ¯ ∗ cross section increases rapidly. This may indicate the presence of a pole close to the threshold.
10.653 GeV-cms, B: pair production, B: particle identification, B: hadronic decay, pole, 10.701 GeV-cms, e+-e− Experiments, Quarkonium, e +-e − Experiments, BELLE, QC770-798, electron positron: colliding beams, electron positron: annihilation, 530, 10.746 GeV-cms, 10.805 GeV-cms, energy dependence, KEK-B, Nuclear and particle physics. Atomic energy. Radioactivity, final state: hadronic, info:eu-repo/classification/ddc/530, channel cross section: measured, Spectroscopy, experimental results
10.653 GeV-cms, B: pair production, B: particle identification, B: hadronic decay, pole, 10.701 GeV-cms, e+-e− Experiments, Quarkonium, e +-e − Experiments, BELLE, QC770-798, electron positron: colliding beams, electron positron: annihilation, 530, 10.746 GeV-cms, 10.805 GeV-cms, energy dependence, KEK-B, Nuclear and particle physics. Atomic energy. Radioactivity, final state: hadronic, info:eu-repo/classification/ddc/530, channel cross section: measured, Spectroscopy, experimental results