The German Belle II collaboration, including the Johannes Gutenberg University Mainz (JGU), developed the innermost detector in Belle II. Belle II datataking has thus far operated smoothly with acceptable backgrounds and has routinely integrated ˘1 fb 1 of •~102X luminosity will probe significantly into >1 TeV mass scale precision CKM, CP, lepton universality, LFV • SuperKEKB/Belle II well underway complementary to LHC in sensitivity . BG reduction is important. SuperKEKB is an upgrade of KEKB , which collides 7 GeV electrons with 4 GeV positrons, providing the invariant mass of e + e − corresponding to mass of the ϒ (4 S).Due to nanobeam crossing with a large (83 mrad) angle, the luminosity of 8 × 1 0 35 cm −2 s −1 is planned … It indicates how many particles are gathered per second and square centimeter. at 50ab 1 • τ µµµ -~8x10 10 at 50ab-1. Luminosity plays a key role here. 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. Tailwind for the search for rare particle decays in the Belle II experiment: The SuperKEKB accelerator ring has now achieved the highest luminosity ever measured. While many components of the Belle II detector are based on the design of the Belle detector, Full description of all the sub-detectors is available elsewhere ([2]). 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 Experiment Carlos Marinas 2.5 Electromagnetic Calorimeter The main role of the electromagnetic calorimeter (ECL) [9] is to reconstruct the energy and angle of the photons and participate in the electron identification. It indicates how many particles are gathered per second and square centimeter. Luminosity plays a key role here. Belle II It indicates how many particles are gathered per second and square centimeter. Title: 11-07-PANIC.B.ppt Author: Kay Kinoshita Created Date: It is thus a factor for the number of collisions that take place and which can be evaluated in the Belle II … The SuperKEKB luminosity milestones continue to fall by the wayside! 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 ]. μμ 0. The Belle II experiment will run with a reduced beam asymmetry and a factor of 40 higher instantaneous luminosity compared to the Belle experiment. tionally to luminosity), and in-beam scattering (Touschek effect, due to stronger focussing). Belle II detector The Belle II detector upgrades or replaces all the sub-detectors of Belle to cope with the increased luminosity and increased beam background produced by SuperKEKB. The Belle II de-tector shown in Figure 5 consists of several sub-detectors. 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 … The German Belle II collaboration developed the innermost detector in Belle II. Belle II: World record in the accelerator ring. We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. During construction of the Belle II detector, the SuperKEKB accelerator was recommissioned to increase the number of particle collisions, a measure called its luminosity. M.Bauer, M.Neubert, A.Thamm arXiv:1708.00443v2. 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. In addition the ECL is used to provide the Belle II online luminosity measurement. The German Belle II collaboration developed the innermost detector in Belle II. The e+e– collider machine was tuned at Y(4S) resonance that falls into a dominant decay channel of B meson pair production. Belle II is a luminosity frontier experiment of the new generation to search for physics beyond the Standard Model of elementary particles, from preci-sion measurements of a huge number of B and charm mesons and tau leptons. Br~10-9. Belle II: 100 fb-1. Maximizing the discovery potential of Belle II for such signals requires a large number of electron-positron collisions, necessitating a very high-luminosity collider, such as SuperKEKB. The German Belle II collaboration developed the innermost detector in Belle II. 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 SuperKEKB luminosity milestones continue to fall by the wayside! The Belle II experiment starts operation at KEK in Japan at the SuperKEKB e + e − collider. BABAR. 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. Collecting data for about 10 years, the Belle II experiment will accumulate 50 times more particle collisions than its predecessor, the Belle experiment. The aim of the experiment is to reach an unprecedented instantaneous luminosity (on the 15th of June 2020 a luminosity of 2,22 x 10³â´/cm²/s was reached, marking a new world record) of 8x.10³âµ/cm²/s that would in turn enable scientists to perform precision measurements of the standard model and to search for very rare processes in B and D mesons as well as in tau leptons. Belle: in preparation, based on full luminosity. In order to read out the events at a high rate from the seven subdetectors of Belle II, we adopt a highly unified The machine has now reached a luminosity of 1.4 × 1034 cm-2 s-1 and is currently integrating around 0.7 fb-1 each day, exceeding the peak luminosity of the former PEP-II/BaBar facility at SLAC, notes Iijima. It is thus a factor for the number of collisions that take place and which can be evaluated in the Belle II detector. Belle II is an international collaboration of ˘1000 members at more than 100 institutions in ... the B factories and LHC with a peak luminosity of 2.4 x 1034cm 2sec 1. at 50 ab 1. 5 . Over its running period, Belle II is expected to collect around 50 times more data than its predecessor due mostly to a factor 40 increase in Other machine backgrounds only scale as the beam current. 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) This will allow studies of B meson decays, along with charm, and many other physics topics, with unprecedent precision in the cleane+e−collider environment. The BELLE experiment was built primarily to study the CP violation in B meson system. Luminosity plays a key role here. This will allow studies of B meson decays, along with charm, and many other physics 𝛾𝛾,𝐶. It is thus a factor for the number of collisions that take place and which can be evaluated in the Belle II detector. Z’ → : muonic dark force g' Z' e + e. L=514 fb-1. Introduction. Belle Il Online luminosity 1.6 Integrated luminosity Recorded Daily 1.4 = 1.2 É 1.0 0.8 0.6 c 0.4 0.2 0.0 Exp: 7-8-10-12-14 - All runs 80 70 60 50 40 30 20 10 00 09 00 Date Plot on 2020/11/11 02:49 JST It indicates how many particles are gathered per second and square centimeter. Tau LFV future prospects at Belle II •Improve achievable sensitivity – Luminosity increase – Background reduction • τ µÎ³ ~2x10-9. 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. measurement at Belle II to be better by a factor 2 if compared to Belle. 5. 2shows a picture of the beam pipe at the IP. Belle II is a luminosity frontier experiment of the new generation to search for physics beyond the Standard Model of elementary particles, from precision measurements of a huge number of B and charm mesons and tau leptons. Belle II General Slides. Furthermore, as we know, the Belle II experiment is under commissioning, and is expected to accumulate 50 ab 1 data by year With the increased … Luminosity plays a key role here. 1. E. Graziani –LDM searches at Belle II - FIPS 2020 - CERN 18. Belle II is designed to operate at a peak luminosity of 8×1035cm−2s−1with a target integrated luminosity of 50 ab−1, a factor of 50 more than the BELLE experiment. BEAST II is running in both Phase 1 and Phase 2 BEAUTY, 20166 ●Due to high beam currents, small beam size and higher luminosity, predicted SuperKEKB Beam background: 40 x KEKB ●Background reduced below this simple expectation by installing moveable … lying dynamics requires more luminosity and extended CME, the study of charmed baryons physics requires ex-tended CME, the researching of charmed mesons and ˝ physics requires more luminosity. We search for the process e + e − → γ a, a → γ γ in the mass range 0.2 < m a < 9.7 GeV / c 2 using data corresponding to an integrated luminosity of (445 ± 3) pb − 1. 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. Munich, June 26, 2020. Even now, the accelerator is preparing for the second part of this upgrade, which will take place in stages over the next 10 years. Belle II data will be collected at the (4 S) resonance, just above the threshold for Bmeson pair production, with a goal of collecting 50 ab 1 by the year 2024. 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. Super KEKB and Belle II From 1998 to 2010, KEK, the Japanese High-Energy Accelerator Research Organisation, operated KEKB, a 3 km circumference asymmetric electron–positron collider thereby reaching the world record in instantaneous luminosity of 2.11x10 34 cm –2 s –1. 2. to compete (with aggressive background suppression) 𝐶. These corrector magnets are installed on each side of the Belle II detector, making adjustments to both the incoming and outgoing beams to maintain high beam intensity, or “luminosity.” High luminosity results in higher collision rates, so physicists at Brookhaven and around the world will have more data to analyze. 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