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Volume 348 - The 27th International Workshop on Vertex Detectors (VERTEX2018) - Main session
Performance Studies of the Belle II Silicon Vertex Detector
K. Lalwani,* H. Aihara, T. Aziz, S. Bacher, S. Bahinipati, E. Barberio, T. Baroncelli, T. Baroncelli, A.K. Basith, G. Batignani11, A. Bauer, P.K. Behera, V. Bertacchi, S. Bettarini, B. Bhuyan, T. Bilka, F. Bosi, L. Bosisio, A. Bozek, F. Buchsteiner, G. Caria1, G. Casarosa, M. Ceccanti, D. Červenkov, T. Czank, N. Dash, M.D. Nuccio, Z. Doležal, F. Forti, M. Friedl, B. Gobbo, J. A., M. Grimaldo, K. Hara, T. Higuchi, C. Irmler, A. Ishikawa, H.B. Jeon, C. Joo, M. Kaleta, J. Kandra, K.H. Kang, P. Kodyš, T. Kohriki, I. Komarov, M. Kumar, R. Kumar, P. Kvasnička, C. Licata, L. Lanceri, J. Lee, S.C. Lee, Y. Li, J. Libby, T. Lueck, P. Mammini, A. Martini, S.N. Mayekar, G.B. Mohanty, T. Morii, K.R. Nakamura, Z. Natkaniec, Y. Onuki,, W. Ostrowicz, A. Paladino, E. Paoloni, H. Park, K. Prasanth, A. Profeti, K.K. Rao, I. Rashevskaya, P.K. Resmi, G. Rizzo, M. Rozanska, D. Sahoo, J. Sasaki, N. Sato, S. Schultschik, C. Schwanda, J. Stypula, J. Suzuki, S. Tanaka, H. Tanigawa, G.N. Taylor, R. Thalmeier, T. Tsuboyama, P. Urquijo, L. Vitale, K. Wan, M. Watanabe, S. Watanuki, I.J. Watson, J. Webb, J. Wiechczynski, S. Williams, H. Yin, L. Zani On behalf of the BELLE II SVD collaboration
*corresponding author
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Pre-published on: 2019 September 03
Published on: 2019 September 06
Abstract
The Belle II experiment at the SuperKEKB asymmetric-energy $e ^{+} e^{−}$ collider in KEK, Japan will operate at an instantaneous luminosity of $8 \times 10^{35} cm^{−2} s^{−1}$, which is about 40 times larger than that of its predecessor, Belle. It is built with the aim of collecting a huge amount of data corresponding to an integrated luminosity of about $50 ab^{−1}$ by 2025 for precise measurements of CP violation and searches for new physics, such as flavor-changing neutral currents, probing
charged Higgs, new sources of CP violation, lepton-flavour violating decays, and searches for a dark photon. At this high luminosity, Belle II will face harsh backgrounds. To validate the performance of a key component of Belle II, the silicon vertex detector (SVD), in such a high rate and background environment, a detailed systematic performance study is essential using the offline reconstruction software. In this work, the performance of the Belle II SVD is validated using commissioning data for each double-sided silicon strip sensor. These studies help us to optimize the operation parameters of the SVD.
DOI: https://doi.org/10.22323/1.348.0052
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