4 research outputs found
Measurements of isospin asymmetry and difference of direct asymmetries in inclusive decays
We report measurements of isospin asymmetry and difference of direct asymmetries between charged and neutral decays. This analysis is based on the data sample containing pairs that was collected with the Belle detector at the KEKB energy-asymmetric collider. Using a sum-of-exclusive technique with invariant mass up to 2.8~GeV/, we obtain \% and \%, where the last uncertainty for is due to the uncertainty on the production ratio of to in decays. The measured value of is consistent with zero, allowing us to constrain the resolved photon contribution in the , and improve the branching fraction prediction. The result for is consistent with the prediction of the SM. We also measure the direct asymmetries for charged and neutral decays. All the measurements are the most precise to date
Measurements of isospin asymmetry and difference of direct asymmetries in inclusive decays
We report measurements of isospin asymmetry and difference of direct asymmetries between charged and neutral decays. This analysis is based on the data sample containing pairs that was collected with the Belle detector at the KEKB energy-asymmetric collider. Using a sum-of-exclusive technique with invariant mass up to 2.8~GeV/, we obtain \% and \%, where the last uncertainty for is due to the uncertainty on the production ratio of to in decays. The measured value of is consistent with zero, allowing us to constrain the resolved photon contribution in the , and improve the branching fraction prediction. The result for is consistent with the prediction of the SM. We also measure the direct asymmetries for charged and neutral decays. All the measurements are the most precise to date
Sense and self Towards an embodied epistemology of acting
Available from British Library Document Supply Centre- DSC:DXN055117 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless decays reconstructed in 2019-2020 Belle II data
We report on measurements of branching fractions () and CP-violating charge asymmetries () of multibody charmless decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. We use a sample of collisions collected in 2019 and 2020 at the resonance and corresponding to fb of integrated luminosity. We use simulation to determine optimized event selections. The and distributions of the resulting samples are fit to determine signal yields of approximately 690, 840, and 380 decays for the channels , , and , respectively. These yields are corrected for efficiencies determined from simulation and control data samples to obtain , , , , , and . Results are consistent with previous measurements and demonstrate detector performance comparable with the best Belle results