Belle II: 100 fb-1. BG reduction is important. The e+e– collider machine was tuned at Y(4S) resonance that falls into a dominant decay channel of B meson pair production. 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. With the increased … 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. 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. 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 SuperKEKB luminosity milestones continue to fall by the wayside! 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. at 50 ab 1. Furthermore, as we know, the Belle II experiment is under commissioning, and is expected to accumulate 50 ab 1 data by year 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. The Belle II de-tector shown in Figure 5 consists of several sub-detectors. Title: 11-07-PANIC.B.ppt Author: Kay Kinoshita Created Date: 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. 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 It is thus a factor for the number of collisions that take place and which can be evaluated in the Belle II detector. 1. 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. 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. 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. 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 … 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. The German Belle II collaboration, including the Johannes Gutenberg University Mainz (JGU), developed the innermost detector in Belle II. Tau LFV future prospects at Belle II •Improve achievable sensitivity – Luminosity increase – Background reduction • τ µÎ³ ~2x10-9. The German Belle II collaboration developed the innermost detector in Belle II. 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. Luminosity plays a key role here. Belle II General Slides. 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 … 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 tionally to luminosity), and in-beam scattering (Touschek effect, due to stronger focussing). Full Detector 3D [pdf, ppt, key] Full Detector 2D SuperKEKB. Belle II datataking has thus far operated smoothly with acceptable backgrounds and has routinely integrated ˘1 fb 1 of In order to read out the events at a high rate from the seven subdetectors of Belle II, we adopt a highly unified 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: in preparation, based on full 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 … In addition the ECL is used to provide the Belle II online luminosity measurement. 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. measurement at Belle II to be better by a factor 2 if compared to Belle. The BELLE experiment was built primarily to study the CP violation in B meson system. The German Belle II collaboration developed the innermost detector in Belle II. 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. Even now, the accelerator is preparing for the second part of this upgrade, which will take place in stages over the next 10 years. 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. at 50ab 1 • τ µµµ -~8x10 10 at 50ab-1. It indicates how many particles are gathered per second and square centimeter. μμ 0. The German Belle II collaboration developed the innermost detector in Belle II. 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 indicates how many particles are gathered per second and square centimeter. It is thus a factor for the number of collisions that take place and which can be evaluated in the Belle II …