000003058 001__ 3058
000003058 005__ 20220615013703.0
000003058 037__ $$aBELLE2-POSTER-CONF-2022-002
000003058 041__ $$aeng
000003058 100__ $$aLudovico Massaccesi
000003058 245__ $$aSimulation of an all-layer monolithic pixel vertex detector for the Belle II upgrade
000003058 260__ $$aPM2021 Pisa Meeting on Advanced Detectors$$c2022-05-22
000003058 300__ $$a1
000003058 500__ $$aPoster. https://agenda.infn.it/event/22092/contributions/166670/
000003058 520__ $$aThe Belle II experiment at the SuperKEKB e+e- collider has started developing an upgrade program on the time frame of 2026-2027 to improve the detector performance and robustness against beam-induced backgrounds. To replace the current Belle II pixel and strip system (VXD), the VTX detector concept has been developed, a fully pixelated system based on thin Depleted Monolithic Active Pixel Sensors organized in 5, or possibly more, barrel layers. To optimize the VTX design and compare it with the VXD system, a full simulation framework has been developed and integrated with the standard Geant4-based Belle II simulation, allowing direct comparison between different layouts. This is made possible by the flexibility of the Belle II track reconstruction code, which can be retrained to operate on any detector layout without changing the code itself. This poster will present the VTX detector concept, the development of the simulation framework, and the simulation results obtained, such as tracking efficiency and vertex resolution on benchmark physics channels (including D mesons from B decays), showing significant improvements with respect to the VXD. This simulation work forms the basis for further optimization of the VTX design.
000003058 6531_ $$aupgrade
000003058 6531_ $$aVXD
000003058 6531_ $$aVTX
000003058 6531_ $$aCMOS
000003058 6531_ $$aMAPS
000003058 6531_ $$aDMAPS
000003058 6531_ $$avertex
000003058 6531_ $$avertex detector
000003058 700__ $$aSuryanarayan Mondal
000003058 700__ $$aBelle II VTX collaboration
000003058 8560_ $$fludovico.massaccesi@pi.infn.it
000003058 8564_ $$uhttps://docs.belle2.org/record/3058/files/BELLE2-POSTER-CONF-2022-002.pdf