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001     599761
005     20250715173007.0
024 7 _ |a 10.1016/j.nima.2023.168550
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024 7 _ |a 0167-5087
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024 7 _ |a 0168-9002
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024 7 _ |a 1872-9576
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024 7 _ |a 10.3204/PUBDB-2023-07487
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024 7 _ |a arXiv:2302.01566
|2 arXiv
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041 _ _ |a English
082 _ _ |a 530
088 _ _ |a arXiv:2302.01566
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100 1 _ |a Natochii, Andrii
|0 P:(DE-H253)PIP1090696
|b 0
|e Corresponding author
245 _ _ |a Measured and projected beam backgrounds in the Belle II experiment at the SuperKEKB collider
260 _ _ |a Amsterdam
|c 2023
|b North-Holland Publ. Co.
336 7 _ |a article
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336 7 _ |a Output Types/Journal article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a Journal Article
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500 _ _ |a 28 pages, 17 figures, 9 tables (revised)
520 _ _ |a The Belle II experiment at the SuperKEKB electron–positron collider aims to collect an unprecedented data set of 50 ab$^{-1}$ to study CP-violation in the B-meson system and to search for Physics beyond the Standard Model. SuperKEKB is already the world’s highest-luminosity collider. In order to collect the planned data set within approximately one decade, the target is to reach a peak luminosity of 6 x 10$^{35}$ cm$^{-2}$ s$^{-1}$ by further increasing the beam currents and reducing the beam size at the interaction point by squeezing the betatron function down to $\beta^{*}_y$ = 0.3 mm. To ensure detector longevity and maintain good reconstruction performance, beam backgrounds must remain well controlled. We report on current background rates in Belle II and compare these against simulation. We find that a number of recent refinements have significantly improved the background simulation accuracy. Finally, we estimate the safety margins going forward. We predict that backgrounds should remain high but acceptable until a luminosity of at least 2.8 x 10$^{35}$ cm$^{−2}$ s$^{−1}$ is reached for $\beta^{*}_y$ = 0.6 mm. At this point, the most vulnerable Belle II detectors, the Time-of-Propagation (TOP) particle identification system and the Central Drift Chamber (CDC), have predicted background hit rates from single-beam and luminosity backgrounds that add up to approximately half of the maximum acceptable rates.
536 _ _ |a 611 - Fundamental Particles and Forces (POF4-611)
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588 _ _ |a Dataset connected to CrossRef, Journals: bib-pubdb1.desy.de
650 _ 7 |a electron positron: annihilation
|2 INSPIRE
650 _ 7 |a electron positron: colliding beams
|2 INSPIRE
650 _ 7 |a beam: background
|2 INSPIRE
650 _ 7 |a vertex: primary
|2 INSPIRE
650 _ 7 |a beam: size
|2 INSPIRE
650 _ 7 |a BELLE
|2 INSPIRE
650 _ 7 |a KEK-B
|2 INSPIRE
650 _ 7 |a new physics: search for
|2 INSPIRE
650 _ 7 |a CP: violation
|2 INSPIRE
650 _ 7 |a particle identification
|2 INSPIRE
650 _ 7 |a drift chamber
|2 INSPIRE
650 _ 7 |a safety
|2 INSPIRE
650 _ 7 |a performance
|2 INSPIRE
650 _ 7 |a betatron
|2 INSPIRE
650 _ 7 |a experimental results
|2 INSPIRE
650 _ 7 |a Detector background
|2 autogen
650 _ 7 |a Lepton collider
|2 autogen
650 _ 7 |a Monte-Carlo simulation
|2 autogen
693 _ _ |a KEK
|e KEK: BELLE I/II
|1 EXP:(DE-H253)KEK-20150101
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700 1 _ |a Browder, T. E.
|0 P:(DE-H253)PIP1029907
|b 1
700 1 _ |a Cao, L.
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700 1 _ |a Cautero, G.
|b 3
700 1 _ |a Dreyer, S.
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700 1 _ |a Frey, A.
|b 5
700 1 _ |a Gabrielli, A.
|b 6
700 1 _ |a Giuressi, D.
|b 7
700 1 _ |a Ishibashi, T.
|b 8
700 1 _ |a Jin, Y.
|b 9
700 1 _ |a Kojima, K.
|b 10
700 1 _ |a Kraetzschmar, T.
|b 11
700 1 _ |a Lanceri, L.
|b 12
700 1 _ |a Liptak, Z.
|b 13
700 1 _ |a Liventsev, D.
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700 1 _ |a Marinas, C.
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700 1 _ |a Massaccesi, L.
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700 1 _ |a Matsuoka, K.
|b 17
700 1 _ |a Meier, F.
|b 18
700 1 _ |a Miller, C.
|b 19
700 1 _ |a Nakayama, H.
|b 20
700 1 _ |a Niebuhr, C.
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700 1 _ |a Novosel, A.
|b 22
700 1 _ |a Parham, K.
|b 23
700 1 _ |a Popov, I.
|b 24
700 1 _ |a Rizzo, G.
|b 25
700 1 _ |a Roney, J. M.
|b 26
700 1 _ |a Ryu, S. Y.
|b 27
700 1 _ |a Santelj, L.
|b 28
700 1 _ |a Schneider, S.
|b 29
700 1 _ |a Schueler, J.
|b 30
700 1 _ |a Schwenker, B.
|b 31
700 1 _ |a Shi, X. D.
|b 32
700 1 _ |a Simon, F.
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700 1 _ |a Stefkova, S.
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700 1 _ |a Takahashi, M.
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700 1 _ |a Tanigawa, H.
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700 1 _ |a Taniguchi, N.
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700 1 _ |a Terui, S.
|0 0000-0001-5211-9079
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700 1 _ |a Vahsen, S. E.
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700 1 _ |a Vitale, L.
|b 40
700 1 _ |a Vossen, A.
|b 41
700 1 _ |a Wang, Z.
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700 1 _ |a Wiechczynski, J.
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700 1 _ |a Windel, H.
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700 1 _ |a Yoshihara, K.
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773 _ _ |a 10.1016/j.nima.2023.168550
|g Vol. 1055, p. 168550 -
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|y 2023
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