Reinstallation and performance of the Belle II Silicon Vertex Detector

Corona, Luigi; Adamczyk, Karol; Aihara, Hiroaki; Bacher, Szymon Grzegorz; Bahinipati, Seema; Baudot, Jerome; Behera, Prafulla Kumar; Bettarini, Stefano; Bilka, Tadeas; Bozek, Andrzej; Buchsteiner, Florian; Casarosa, Giulia; Dujany, Giulio; Finck, Christian; Forti, Francesco; Friedl, Markus; Gabrielli, Alice; Gobbo, Benigno; Halder, Soumen; Hara, Koji; Hazra, Sagar; Higuchi, Takeo; Irmler, Christian; Ishikawa, Akimasa; Kaleta, Mateusz; Kaliyar, Abdul Basith; Kang, Kookhyun; Kohriki, Takashi; Kumar, Rajesh; Lalwani, Kavita; Lautenbach, Klemens; Leboucher, Robin; Libby, James Frederick; Martel, Lucas; Massaccesi, Ludovico; Mohanty, Gagan Bihari; Mondal, Suryanrayan; Nakamura, Katsuro; Natkaniec, Zbigniew Marian; Onuki, Yoshiyuki; Otani, Fumiaki; Paladino, Antonio; Paoloni, Eugenio; Rao, Kameswara Kodali; Ravindran, Krishnakumar; Ripp-baudot, Isabelle; Rizzo, Giuliana; Sato, Yo; Schwanda, Christoph; Serrano, Justine; Shimasaki, Tomoyuki; Suzuki, Junichi; Tanaka, Shuji; Tenchini, Francesco; Thalmeier, Richard; Tiwary, Rahul; Tsuboyama, Toru; Uematsu, Yuma; Vitale, Lorenzo; Wang, Zihan; Wiechczynski, Jaroslaw; Yin, Hao; Zani, Laura; Zeng, Fanli; Das, Sanjeeda Bharati; On behalf of the BELLE II SVD collaboration,

doi:10.22323/1.476.0855

Volume 476 - 42nd International Conference on High Energy Physics (ICHEP2024) - Operation, Performance and Upgrade (incl. HL-LHC) of Present Detectors

Reinstallation and performance of the Belle II Silicon Vertex Detector

L. Corona*, K. Adamczyk, H. Aihara, S.G. Bacher, S. Bahinipati, J. Baudot, P.K. Behera, S. Bettarini, T. Bilka, A. Bozek, F. Buchsteiner, G. Casarosa, G. Dujany, C. Finck, F. Forti, M. Friedl, A. Gabrielli, B. Gobbo, S. Halder, K. Hara, S. Hazra, T. Higuchi, C. Irmler, A. Ishikawa, M. Kaleta, A.B. Kaliyar, K. Kang, T. Kohriki, R. Kumar, K. Lalwani, K. Lautenbach, R. Leboucher, J.F. Libby, L. Martel, L. Massaccesi, G.B. Mohanty, S. Mondal, K. Nakamura, Z.M. Natkaniec, Y. Onuki, F. Otani, A. Paladino, E. Paoloni, K.K. Rao, K. Ravindran, I. Ripp-baudot, G. Rizzo, Y. Sato, C. Schwanda, J. Serrano, T. Shimasaki, J. Suzuki, S. Tanaka, F. Tenchini, R. Thalmeier, R. Tiwary, T. Tsuboyama, Y. Uematsu, L. Vitale, Z. Wang, J. Wiechczynski, H. Yin, L. Zani, F. Zeng, S.B. Das and On behalf of the BELLE II SVD collaborationet al. (click to show)

*: corresponding author

Full text: pdf

Pre-published on: December 17, 2024

Published on: April 29, 2025

Abstract

At the beginning of 2024, the data taking of the Belle II experiment resumed after the long-shutdown 1, required to install a new two-layer DEPFET detector (PXD) and upgrade accelerator components. The whole silicon tracker (VXD) was extracted, the two halves of the outer strip detector (SVD) were split for the PXD insertion and reconnected again. The new VXD was commissioned for the start of the new run.
We will describe the challenges of this VXD upgrade and report on the operational experience and the SVD performance obtained with this first-year data. We then introduce the various improvements in the reconstruction procedure, that exploit the excellent SVD hit-time resolution to enhance beam-induced background rejection and reduce track fake-rate, crucial aspects for the higher luminosity regime.

DOI: https://doi.org/10.22323/1.476.0855

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