belle ii luminosity

Official luminosity projection (updated regularly) Explanation of the luminosity projection (2015) Member Institutes: (based on B2MMS data as on Aug 17th, 2019) Please find below interactive map to … PoS(Vertex2019)015 (The Belle II PXD Collaboration) a University of Barcelona, C/Marti Franques, 1., 08028-Barcelona, Spain b Institute of High Energy Physics, CAS, 19B Yuquan Road, Shijingshan District, Beijing, China c University of Bonn, 53115 Bonn, Germany d Justus-Liebig-Universität Gießen, 35392 Gießen, Germany e II. The e+e– collider machine was tuned at Y(4S) resonance that falls into a dominant decay channel of B meson pair production. Its design luminosity is 8 × 10 35 cm –2 s –1, 40 times that of previous B-factory experiments, and the machine will operate in “factory” mode with the aim of recording an unprecedented data sample of 50 ab –1. It indicates how many particles are gathered per second and square centimeter. Due to the higher beam current and luminosity, the beam background rates are significantly higher and hence Belle II has been designed for a 30 kHz level 1 trigger rate.Fig. The German Belle II collaboration developed the innermost detector in Belle II. Other machine backgrounds only scale as the beam current. 2shows a picture of the beam pipe at the IP. Luminosity plays a key role here. This will allow studies of B meson decays, along with charm, and many other physics The accelerator has just passed the original design luminosity of the PEP-II B-factory accelerator at the SLAC National Accelerator Laboratory, 3.0 x 10^33/cm2/sec. Full Detector 3D [pdf, ppt, key] Full Detector 2D SuperKEKB. measurement at Belle II to be better by a factor 2 if compared to Belle. Z’ → : muonic dark force g' Z' e + e. L=514 fb-1. Luminosity plays a key role here. Today [s ontents • Beam background sources at SuperKEKB/Belle II –Touschek scattering/Beam-gas scattering • Countermeasures: collimators and shield structures –Synchrotron radiation –Luminosity-dependent BG (radiative Bhabha, 2-photon process) Full description of all the sub-detectors is available elsewhere ([2]). M.Bauer, M.Neubert, A.Thamm arXiv:1708.00443v2. Belle II is designed to operate at a peak luminosity of 8 3510 cm 2s 1 with a target integrated luminosity of 50 ab 1 , a factor of 50 more than the BELLE experiment. The German Belle II collaboration developed the innermost detector in Belle II. 5. We have started up- grading both the accelerator and the detector, SuperKEKB and Belle-II, to achieve the target luminosity of 8 × 1035cmŠ 2sŠ 1. The Belle II detector The Belle II detector is an upgrade of the Belle detector: it is housed in the same structure, reusing the spectrometer magnet. During construction of the Belle II detector, the SuperKEKB accelerator was recommissioned to increase the number of particle collisions, a measure called its luminosity. The Belle II experiment will run with a reduced beam asymmetry and a factor of 40 higher instantaneous luminosity compared to the Belle experiment. to compete (with aggressive background suppression) 𝐶. Compared to Belle, the Belle II detector will be taking data at an accelerator with 40 times higher luminosity, and thus has to be able to operate at 40 times higher physics event rates, as well as with background rates higher by a factor of 10 to 20 [ 2 ]. Belle II: World record in the accelerator ring. BABAR. The SuperKEKB luminosity milestones continue to fall by the wayside! 𝛾𝛾,𝐶. BG reduction is important. In addition the ECL is used to provide the Belle II online luminosity measurement. at 50ab 1 • τ µµµ -~8x10 10 at 50ab-1. 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