1. Kihyeon Cho Supercomputing Center KISTI
YongPyong 2013 Winter Conference
Feb. 24~28, YongPyong, Korea
A research on the theory-experiment-simulation Probing the Standard Model
Kihyeon Cho
Supercomputing Center
KISTI

2. Working with
Soo-hyeon Nam
JungHyun Kim
Taegil Bae
Huihyung Ryu

4. Contents Introduction of particle physics Theory-Experiment-Simulation
Theory-Simulation
Simulation-Experiment
Experiment-Theory
Results
Summary

5. Particle Physics in 21st Century
LHC, ILC, etc.
Energy
Frontier
B- Factory
New Particles,
New Interactions,
etc.
New Physics
CP Violation,
Baryogenesis,
Left-Right Model,
etc.
Lepton
Physics
Flavor
Physics
J-PARC, etc.
Lepton mixing,
Lepton number violation,
etc.

6.  To probe the Standard Model
Theory-Experiment-Simulation
For particle Physics
Theory
Flavor Physics
Phenomenological Model
- Lattice QCD
Experiment
Simulation
Cyber HEP Lab
Geant4
-KISTI Supercomputer
- CDF
- Belle
 To probe the Standard Model

7. Interconnection Network
KISTI Supercomputer
Tachyon(SUN)
Phase 2
Manufacture
SUN Blade 6048
Architecture
Cluster
Process model
Intel (Nehalem)
# of Nodes
3,200 nodes
# of CPU cores
25,600
(8 per node)
Rpeak
(Tflops)
300
324
Total Memory
76TB
Disk Storage
1.2PB
Tape Storage
2PB
Interconnection Network
IB 4X QDR
Sun Linux Cluster
Geant4 ST
Geant4 MPI(ParGeant4)
Geant4 MT

8. Ex) A study of Higgs model
1. Theory-Simulation
Theory model – Simulations
Phenomenological model
Lattice QCD
Ex) A study of Higgs model
using

9. Lattice QCD
Date
Parameters
X iteration
CPU used
2011.7
200 X 9
batch que
2012.4
600 X 9
4272 core
2012.8
800 X 9
4096 core
BK=0.727±0.004(stat.)±0.038(sys.)  Consistent with SM within3σ

11. 2. Simulation-Experiment
Cyber HEP Laboratory
- To study high energy physics anytime anywhere even if we are not on-site (accelerator laboratory)
1. Data production
• CDF Remote Control Room
@KISTI
2. Data processing
• Pacific CAF(CDF Analysis Farm) ⇒ North America
3. Data Analysis Collaboration
• EVO
4. Belle II Data Handling System • Working Group Chair (K. Cho)
Geant4 Simulation
- Bench marking Test

12. CDF Remote Control Room
Cyber HEP environment
CDF Remote Control Room
KISTI Remote Control Room
CDF Operation Center
또한 세번째 상상 그 이상의 혁신적인 아이디어는 미국 페르미연구소 CDF 실험의 원격제어실을 만들어
국내 사용자에게 서비스하고 있다는 점입니다. 가속기가 없는 한국에서 가속기가 있는 미국 페르미연구소와
같은 연구환경을 구축하여, 국내 연구자가 페르미연구소를 방문하지 않고서도, 가속기 충돌 실험의
실시간 데이터 생산에 참여할 수 있다는 점입니다. 이 혁신적인 아이디어는 KBS등 언론에 14건 보도 되었습니다.
We take shifts at KISTI even if we are not at Fermilab.

14. Theory-Experiment-Simulation
Geant4 Simulation
Theory-Experiment-Simulation
To find Higgs particle
New Physics?
Theory
(Higgs)
Simu-lation
(Geant4)
Experi-ment
(ATLAS,
CMS)
Geant4
Wednesday, Landau shows similar diagram. According to Tony Hey, the 21st century is for data centric science called e-Science to unify theory, experiment and computing. We apply this concept to collider physics.
The goal is to probe SM and search for new physics. We focus on charm, bottom, top and Higgs.

15. Bench Marking Test (1/2) Content Parameter Thread
Geant4-ST(Single Thread), PM(ParGeant4 MPI)
The number of events
10, 50, 100, 500, 1000, 5000, 10000, 20000, 50000,
PM # of cores
8, 16, 64, 128
Application
CmsExp

16. Bench Marking Test (2/2)

17. 3. Experiment-Theory
⇒ Feed-back between experiments (Belle & CDF) and theories inside KISTI 16

19. + Left-Right Model X B B μ B X μ s c s c c s s c s s
Mixing and CPV on Bs
W,W’(φ,φ’) s, d b
u,c,t s, b d
u,c,t
u,c,t
W,W’(φ,φ’)
W,W’(φ,φ’) s, d b s, d
u,c,t b
W,W’(φ,φ’) X B B μ B X μ
CP Violation dimuon charge asymmetry due to B mixing

21.  Still uncertain beyond Standard Model or not
Results
Physics
Experiment
Theory
Kaon Semi-leptonic Form Factor
Belle Experiment
Lattice QCD using staggered Fermion
BK=0.727±0.004(stat.) ±0.038(sys.)
Rare B0 decays
B(B0→0) < 1.5 X10-7
at the 90% C.L.
B(B0→0) < 3.3 X 10-7
Left-Right Models
“Left-right mixing on leptonic and semileptonic b-> u decays”
Mixing and CPV on Bs
CDF Experiment
βs within [-π/2,-1.51] U [-0.06,0.30] U [1.26,π/2]
at the 68% C.L. ΔΓs = ± (stat)± (syst)) ps-1
τs = ± (stat) ± (syst) ps
“Right-Handed Current Contributions in B → K π Decays”
CP Violation dimuon charge asymmetry due to B mixing
D0 experiment
Left-Right models
“CP violating dimuon charge asymmetry in general left-right models”
Study of Higgs Models
LHC experiment
SU(4)(L) x U(1)(X) models with little Higgs
 Still uncertain beyond Standard Model or not

22. Summary Output Flavor physics using the concepts of fusion research
To study particle physics anytime and anywhere
Fusion research of experiment–theory-simulation
 Still uncertain beyond Standard Model or not
Publication
B physics
Collider physics using e-Science paradigm of experiment-computing-theory
Leading Belle II Data Handling Working Group which consists of more than 30 persons from 12 countries
comment 21

23. Thanks