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

Abstract

From April to July 2018, a data sample at the peak energy of the ${\rm Y}(4S)$ 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.

12 pages, 2 figures, the first Belle II Collaboration paper, to be published in Chinese Physics C

References in corpus (4)

• An Introduction to PYTHIA 8.2
• Matching perturbative and Parton Shower corrections to Bhabha process at flavour factories
• Photon pair production at flavour factories with per mille accuracy
• Dark Sector Physics at the Belle II Experiment

Cited by in corpus (24)

• Search for Axion-Like Particles produced in $e^{+}{e}^{-}$ collisions at Belle II
• Evidence for $B^{+}\to K^{+}\nu \bar{\nu }$ decays
• Search for $B^{+}\to K^{+}\nu \bar{\nu }$ decays using an inclusive tagging method at Belle II
• Search for an invisibly decaying $Z^{\prime }$ boson at Belle II in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}(e^{\pm }{\mu }^{\mp })$ plus missing energy final states
• A hybrid, asymmetric, linear Higgs factory based on plasma-wakefield and radio-frequency acceleration
• Measurement of the integrated luminosity of data samples collected during 2019-2022 by the Belle II experiment
• Observation of $e^{+}{e}^{-}\to \omega {\chi }_{bJ}(1P)$ and search for $X_b\to \omega {\rm Y}(1S)$ at $\sqrt{s}$ near 10.75 GeV
• CsI(Tl) Pulse Shape Discrimination with the Belle II Electromagnetic Calorimeter as a Novel Method to Improve Particle Identification at Electron-Positron Colliders
• Search for Lepton-Flavor-Violating $\tau$ Decays to a Lepton and an Invisible Boson at Belle II
• Search for an invisible $Z^{\prime }$ in a final state with two muons and missing energy at Belle II
• Search for a dark photon and an invisible dark Higgs boson in ${\mu }^{+}{\mu }^{-}$ and missing energy final states with the Belle II experiment
• Experimentation at a muon collider
• Simulations and experimental results on beam-beam effects in SuperKEKB
• Search for a ${\mu }^{+}{\mu }^{-}$ resonance in four-muon final states at Belle II
• Search for a ${\tau }^{+}{\tau }^{-}$ resonance in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}{\tau }^{+}{\tau }^{-}$ events with the Belle II experiment
• Dark Sector first results at Belle II
• Measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^0$ cross section in the energy range 0.62-3.50 GeV at Belle II
• Measurement of the branching fraction and $CP$ asymmetry of $B^0\to {\pi }^0{\pi }^0$ decays using $198\times 10^6$ $B\overline{B}$ pairs in Belle II data
• Challenges for FCC-ee Luminosity Monitor Design
• Measurements of branching fractions and direct CP asymmetries in $B^0\to K^{+}{\pi }^{-}$, $B^{+}\to K_{\mathrm{S}}^0{\pi }^{+}$ and $B^0\to {\pi }^{+}{\pi }^{-}$ using 2019 and 2020 data
• Determination of $|V_{cb}|$ using $B\to D\ell {\nu }_{\ell }$ Decays at Belle II
• Search for the baryon number and lepton number violating decays ${\tau }^{-}\to \Lambda {\pi }^{-}$ and ${\tau }^{-}\to \bar{\Lambda }{\pi }^{-}$ at Belle II
• $B$-flavor tagging at Belle II
• Left-right asymmetry calculation comparisons and projected sensitivity to the weak mixing angle in polarized Bhabha scattering at 10.58 GeV