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

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

A quantum electromechanical interface for long-lived phonons

Kavli Affiliate: Mohammad Mirhosseini | Summary:Controlling long-lived mechanical oscillators in the quantum regime holds promises for quantum information processing. Here, we present an electromechanical system capable of operating in the GHz-frequency band in a silicon-on-insulator platform. Relying on a novel driving scheme based on an electrostatic field and high-impedance microwave cavities based on TiN superinductors, […]


Continue.. A quantum electromechanical interface for long-lived phonons

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

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