Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B to J/ψK$ decays at Belle II

Posted by klaurent Tokyo

Kavli Affiliate: T. Higuchi | First 5 Authors: Belle II Collaboration, F. Abudinén, I. Adachi, R. Adak, K. Adamczyk | Summary: We report a study of $B to J/psi(ell^{+}ell^{-})K$ decays, where $ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at […]


Continue.. Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B to J/ψK$ decays at Belle II

Two-Stage Fine-Tuning: A Novel Strategy for Learning Class-Imbalanced Data

Posted by klaurent Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Taha ValizadehAslani, Yiwen Shi, Jing Wang, Ping Ren, Yi Zhang | Summary: Classification on long-tailed distributed data is a challenging problem, which suffers from serious class-imbalance and hence poor performance on tail classes with only a few samples. Owing to this paucity of samples, learning on the […]


Continue.. Two-Stage Fine-Tuning: A Novel Strategy for Learning Class-Imbalanced Data