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Report No.

Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

Abudin$'e$n, F.*; Tanida, Kiyoshi   ; Belle II Collaboration*; 420 of others*

From April to July 2018, a data sample at the peak energy of the $$Upsilon(4S)$$ resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be ($$496.3 pm 0.3 pm 3.0$$) pb$$^{-1}$$, where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.



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Category:Physics, Nuclear



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