Development of stable Grid service at the next generation system of KEKCC

Nakamura, T.; Iwai, G.; Matsunaga, H.; Murakami, K.; Sasaki, Takashi; Suzuki, S.; Takase, Wataru

doi:10.1088/1742-6596/898/5/052042

Cited by 3 publications

(1 citation statement)

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“…To predict the losses in the IR with reasonable statistics, we typically generate 100 particles per scattering position per ring, for every single-beam scattering process (i.e., Coulomb, Bremsstrahlung, and Touschek). The KEK Central Computer system [19,20] enables us to run more than 1000 simulations in parallel, thereby improving statistics and reducing computation time. Each final tracking simulation sample contains about 10 6 −10 8 generated particles per ring.…”

Section: A Existing Simulation Infrastructurementioning

confidence: 99%

Improved simulation of beam backgrounds and collimation at SuperKEKB

Natochii,

Vahsen,

Nakayama

et al. 2021

Preprint

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Mitigation of beam backgrounds via collimators is critical for the success of the Belle II experiment at the SuperKEKB electron-positron collider. We report on an improved simulation methodology, which includes a refined physical description of the collimators and beam pipe, our first implementation of collimator tip scattering, and in which the existing beam particle tracking software has been embedded into a new sequential tracking framework. These improvements resolve longstanding discrepancies between measured and predicted Belle II background levels, and significantly reduce the computing time required to optimize the collimation system in simulation. Finally, we report on collimator aperture scans, which confirm the accuracy of the simulation and suggest a new method for aligning the collimators.

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Section: A Existing Simulation Infrastructurementioning

confidence: 99%

Improved simulation of beam backgrounds and collimation at SuperKEKB

Natochii,

Vahsen,

Nakayama

et al. 2021

Preprint

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Improved simulation of beam backgrounds and collimation at SuperKEKB

Natochii

Vahsen²,

Nakayama³

et al. 2021

Phys. Rev. Accel. Beams

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Исследования характеристик детектора ARICH в распаде D*±-мезона в эксперименте Belle II с применением метода Монте-Карло

Акопов¹,

Гевондян²,

Мурадян³

et al. 2023

Astrophysics

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Дана оценка моделирования с применением метода Монте-Карло (МК) отношения сигнала к фону в спектре инвариантной массы системы каон–пион для распадов D0 →K− π+ и 𝐷𝐷0→K+ π− , производимых в цепочке распадов D*+→D0 π+ и D*−→ 𝐷𝐷0π− , в различных интервалах импульсов/углов пионов (когда пион попадает в аксептанс детектора ARICH) и каонов (каон регистрируется в ARICH). Табулированные значения упомянутых отношений будут использованы коллаборацией Belle II для изучения производительности работы детектора ARICH. Затем результаты эффективностей и вероятностей ложной идентификации сигналов, полученные на основе табулированных отношений, будут важным ингредиентом для будущих физических интерпретаций данных коллаборации Belle II. An estimate is given of the simulation with the Monte Carlo method using the signal to background ratios in invariant mass spectra of pion-kaon system for decays of D0 →K−π+ and 𝐷𝐷0→K+π− originated from decays of D*+→D0 +π+ and D*−→ 𝐷𝐷0+π− at different momentum/angular bins of pions (when pion is coming to the ARICH acceptance) and kaons (kaon is in ARICH acceptance). The tabulated data for mentioned ratios will be used by Belle II collaboration to study the ARICH performance. Then the results of ARICH efficiencies and misidentification probability extracted based on tabulated ratios, will become important ingredient for future physics analysis․

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Development of stable Grid service at the next generation system of KEKCC

Cited by 3 publications

References 0 publications

Improved simulation of beam backgrounds and collimation at SuperKEKB

Improved simulation of beam backgrounds and collimation at SuperKEKB

Improved simulation of beam backgrounds and collimation at SuperKEKB

Исследования характеристик детектора ARICH в распаде D*±-мезона в эксперименте Belle II с применением метода Монте-Карло

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