Belle II several slides from Computing T. Hara Thomas Kuhr 1 - - PowerPoint PPT Presentation

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Belle II several slides from Computing T. Hara Thomas Kuhr 1 - - PowerPoint PPT Presentation

Jan 05, 2023 14 likes •208 views

Belle II several slides from Computing T. Hara Thomas Kuhr 1 LMU Mnchen Search for New Physics There must be so far unobserved particles or forces Direct search: Production of new particles ATLAS, CMS @ LHC Indirect

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Belle II Computing

Thomas Kuhr LMU München several slides from

  • T. Hara
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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 2

Search for New Physics

➔ There must be so far unobserved particles or forces 

Direct search: Production of new particles ATLAS, CMS @ LHC →

Indirect search: Contribution of virtual new particles to observed processed Flavor physics →

Mass Coupling direct indirect

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 3

B D →

(*)τν

➢ World average of R(D), R(D*) 4.1σ away from SM prediction

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 4

Belle II @ SuperKEKB: 50 ab-1

8 x 1035 cm-2 s-1

SuperKEKB (LHC) Belle: 1 ab–1 LHC Run 3: 0,3 ab-1

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 5

Belle II Detector

electrons (7GeV) positrons (4GeV)

KL and muon detector:

Resistive Plate Counter (barrel) Scintillator + WLSF + MPPC (end-caps)

Particle Identifjcation

Time-of-Propagation counter (barrel)

  • Prox. focusing Aerogel RICH (fwd)

Central Drift Chamber

He(50%):C2H6(50%), small cells, long lever arm, fast electronics

EM Calorimeter:

CsI(Tl), waveform sampling (barrel) Pure CsI + waveform sampling (end-caps)

Vertex Detector

2 layers DEPFET + 4 layers DSSD

Beryllium beam pipe

2cm diameter

TDR: arXiv:1011.0352

Tracking Velocity detector Calorimeter Magnet Muon detector Muon Photon Charged particle

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 6

B D →

(*)τν @ Belle II

➢ Challenge: Reconstruction of decays with neutrinos

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Time Line

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First Collisions on April 26

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Data Flow

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Resource Estimates

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Belle II Collaboration

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Computing Model

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Expected Network Traffic

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Computing System

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Production System

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Monitoring

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MC Production Campaigns

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 18

Summary

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Exciting physics potential with 50 ab-1 at Belle II

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Two orders of magnitude higher data volume than at Belle

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Distributed computing system based on

➔ Existing technologies: DIRAC, LFC, CVMFS, ... ➔ Own development: DIRAC extensions, gbasf2 client, ... ➢

DIRAC provides interface to ARC-CEs

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NorduGrid Conference, 04.06.2018 Thomas Kuhr Seite 19

Belle II Virtual Reality