SuperKEKB 第二阶段束流本底测量
仪器与探测器
2022-08-10 v1 高能物理 - 实验
摘要
SuperKEKB 正负电子对撞机的高设计亮度将导致相互作用区出现极具挑战性的束流诱发本底水平。理解并缓解这些本底对 Belle II 实验的成功至关重要。我们报告了在 Belle II 探测器滚入后、称为 SuperKEKB 第二阶段的时期内进行的首次本底测量，利用了专用的 BEAST II 本底探测系统以及 Belle II 探测器本身。我们还报告了根据我们的发现对本底模拟所作的首次修订。测量的本底包括同步辐射、束流-气体、Touschek 以及注入本底的贡献。在第二阶段结束时，源自 4 GeV 正电子低能环（LER）的单束本底与模拟相当吻合，而源自 7 GeV 电子高能环（HER）的本底比模拟约高一个数量级。我们将这些本底向前外推，并得出结论：安装 Belle II 顶点探测器是安全的。
引用
@article{arxiv.2112.14537,
title = {Measurements of Beam Backgrounds in SuperKEKB Phase 2},
author = {Zachary J. Liptak and Antonio Paladino and Luka Santelj and Jeffery Schueler and Slavomira Stefkova and Hikaru Tanigawa and Noritsugu Tsuzuki and Alberto Aloisio and Patrick Ahlburg and Philip Bambade and Giovanni Bassi and Matthew Barrett and Jerome Baudot and Thomas Browder and Giulia Casarosa and Giuseppe Cautero and David Cinabro and Gilles Claus and Daniel Cuesta and Francesco Di Capua and Salvatore Di Carlo and John Flanagan and Ariane Frey and Bryan Fulsom and Yoshihiro Funakoshi and Miroslav Gabriel and Raffaele Girodano and Dario Giuressi and Mathieu Goffe and Koji Hara and Oskar Hartbrich and Michael Hedges and Daniel Heuchel and Naoko Iida and Takuya Ishibashi and Kimmo Jaaskelainen and Didier Jehanno and Samuel de Johng and Thomas Kraetzschmar and Chiara la Licata and Livio Lanceri and Philipp Leitl and Peter Lewis and Carlos Marinas and Caleb Miller and Katsuro Nakamura and Hiroyuki Nakayama and Carsten Niebuhr and Yoshiyuki Onuki and Chengguo Pang and Botho Paschen and Isabelle Ripp-Baudot and Giuliana Rizzo and J. Michael Roney and Harrison Schreeck and Benjamin Schwenker and Frank Simon and Matthieu Specht and Bjoern Spruck and Yuri Soloviev and Michal Szelezniak and Shuji Tanaka and Shinji Terui and Gennaro Tortone and Tohru Tsuboyama and Yuma Uematsu and Sven Einar Vahsen and Lorenzo Vitale and Hendrik Windel},
journal= {arXiv preprint arXiv:2112.14537},
year = {2022}
}
备注
22 Pages, 33 figures