December 22, 2020
online meeting by Zoom
Asia/Tokyo timezone


We have sent the Zoom link to the registered participants on December 15th. Please let us know if you have not received the link, while you already registered. The contact info can be found in the registration page.


(English version follows.)

SuperKEKB/Belle IIでは、2030年代初頭までにKEKB/Belleの50倍の積分ルミノシティーを蓄積し、B中間子・D中間子・タウ粒子の精密測定・禁止過程探索により、標準模型を超える物理を探ることを主目的としています。また、高輝度電子陽電子衝突実験の特徴を生かした、ダークセクターやアクシオンのような粒子(ALP)などの新粒子の直接探索も目標としています。

SuperKEKB 加速器は2020年6月15日に世界最高ルミノシティに到達し、さらに自己の記録を2020年6月15日に 2.40×10^34/cm^2/s と塗り替えました。Belle II 実験は順調にデータを収集し、74/fb をテープに記録し、現在解析が進行中です。2020年10月19日にSuperKEKB 加速器の運転を再開し、Belle II 実験はデータ収集を開始しました。


進藤 哲央 氏(工学院大)             "CP asymmetries of B to X_{s,d} gamma in models with three Higgs doublets"
Thomas Czank(Kavli IPMU)     "Dark sector in Belle II: Achievements and Prospects"
吉原 圭亮 氏(Iowa State/KEK) "Status of Belle II/SuperKEKB operation



理論: 遠藤基、大野木哲也、岡田安弘、金児隆志、清裕一郎、後藤亨、      田中実、谷本盛光、野尻美保子、久野純治、三島智、両角卓也
実験: 石川明正、後田裕、西田昌平、早坂圭司、樋口岳雄

The main purpose of SuperKEKB/Belle II is to search for new physics beyond the Standard Model through B, D and tau decays by accumulating 50 times more data than KEKB/Belle by the early 2030's. It also aims to directly search for dark-sector and axion-like particles by taking advantage of high luminosity e+e- collider experiments.

SuperKEKB had achieved world's highest luminosity on 15th June 2020, and
further broke the record as 2.40×10^34/cm^2/s on 15th June 2020. Belle II smoothly performed data taking, had recorded 74/fb data to tape, and physics analyses are now on-going. On 19th October 2020, SuperKEKB resumed the operation and Belle II start data taking.

This series of meetings aims to provide opportunities, where theorists and experimentalists get together and closely discuss physics at B factories. In this 23rd meeting, we will have the following invited talks:

Tetsuo Shindou (Kogakuin)                 "CP asymmetries of B to X_{s,d} gamma in models with three Higgs doublets"
Thomas Czank (Kavli IPMU)                "Dark sector in Belle II: Achievements and Prospects"
Keisuke Yoshihara (Iowa State/KEK)  "Status of Belle II/SuperKEKB operation

The working language is English, and non-Japanese participants are very welcome! The meeting will be oneline by Zoom. Please register from "Registration" in the left menu by December 14 (Mon). The Zoom  connection information will be sent to the participants by email after the deadline.

Th:  M. Endo, T. Goto, J. Hisano, T. Kaneko, Y. Kiyo, S. Mishima,  T. Morozumi, M. Nojiri, Y. Okada, T. Onogi, M. Tanaka, M. Tanimoto
Exp: K. Hayasaka, T. Higuchi, A. Ishikawa, S. Nishida, Y. Ushiroda,

online meeting by Zoom
Registration for this event is currently open.