Russian Academy of Science
ACPP
Automated Calculation in Particle Physics
France-Japan-Russia collaboration
Denis Perret-Gallix CNRS
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Matter and Forces
Russian Academy of Science
“The standard model”
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Unsolved Mysteries
Russian Academy of Science
Why do we see matter and almost no anti-matter?
CP violation
Belle- Babar exp.
Why the « standard model»
does not predict the mass ?
The Higgs Particle ?
What is this « dark matter » that we cannot see
but has visible gravitational effects?
Why the neutrino mass is so small?
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Unsolved Mysteries
Russian Academy of Science
Are quarks and leptons actually
fundamental, or made up of even more
fundamental particles?
Why are there exactly three
generations of quarks and leptons?
…
IV …
How does gravity fit into all of this?
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Beyond the “Standard Model”
Russian Academy of Science
Supersymmetry
M-theory and extra-dimensions
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
LHC at CERN
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
WMAP results
Russian Academy of Science
Universe expansion speeds up
WMAP Photon temperature 2.73K
• 70% dark energy
• 25% dark matter
• 5% matter and radiation
Comological constant anti-gravity
Einstein: « My biggest mistake »
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Experiment Simulation
A Mandatory Component of
HEP experiments
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Physics Model
Nature
Process
Event simulation
Event Generator
Event: E/P Quadri-vectors
Detectors Simulation
Detectors
Event: Hits, Energies, Timing
Event: Hits, Energies, Timing
Reconstruction
Comparison
Event: E/P Quadri-vectors
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Event simulation
at LHC
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Hadron collider
Physics
Russian Academy of Science
b
Hadronization
c
s-
d
1 0
W+
u-
Parton shower
Wt1-~
1 0
t
t-~
~
g~ u
u
u
Hard sub-process
g
P
P
Multiple interaction/underlying event
Franco-Russia Forum
Dec. 6-7 2004
Heavy Quarks
Denis Perret-Gallix
CNRS
Interaction
Computation
Feynman
diagrams
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Higher order calculations
H+  t b at first order 1
at 1-loop
97 diagrams
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
What is automatic calculation？
Russian Academy of Science
It is now impossible to perform
accurate theoretical calculations
by hand for collider experiments.
★Increasing the requested accuracy
at LHC ～10% at ILC ～0.1%
Radiative Corrections LHC ～ 100%，LC ～ 10%
⇒”Tree” is not adequate.
Need higher order corrections!!
★ Multi-particle productions
⇒increasing the number of diagrams.
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
J. Fujimoto
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
International Research Group
ACPP: Automated Calculation in Particle Physics
• 48 physicists from France, Russia, Japan
– Russia:
Lomonosov Moscow State Univ.(14), Russian Academy of Science(2)
– Japan: KEK: Minami-Tateya collaboration(19)
– France:
CNRS(9), Univ. de Savoie, Clermont 2(1), Montpellier 2(2), Paris. 11(1)
• Main packages:
Grace, Grace 1-L (28 pub), CompHEP, LanHEP, CalcHEP (30 Pub)
• For LHC, ILC, Astro-Particle Physics
GRC4F (147 cit.), micrOMEGAs,…
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Grace Package(Japan)
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Comphep Package (Russia)
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
LEP II: GRC4F
Russian Academy of Science
a 4-fermion event generator for e+e- collisions
• Tree level helicity amplitudes produced by “GRACE”
http://www-sc.kek.jp/minami/
• Fermion mass and full spin correlations included
• 76 4-fermion final states processes >2500 diag.
• ISR, FSR, Beamstrahlung
• Interface to Parton showers and hadronization (Pythia)
• Anomalous couplings
• hep-ph/9605312, Comp. Phys. Comm 100:128-156
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Radiative Corrections to Higgs processes
by GRACE
International Linear Collider
processes
e e  H
e e  t tH
e  e   ZHH
ee  ee H
e  e    
e  e    u d
ee  HH
Franco-Russia Forum
Dec. 6-7 2004
# of tree
(all)
# of 1-loop
(all)
12
12
27
42
10
44
1350
2327
5417
4470
1099
6094
81
19638
Denis Perret-Gallix
CNRS
published
Phys. Lett. B559(2003)252
Phys. Lett. B571(2003)163
Phys. Lett. B576(2003)152
hep-ph/0407065
Presented at ACAT03
Presented at Loop&Legs(preliminary
results)
Presented at
ECFA2004(Durham)
J. Fujimoto
Russian Academy of Science


e e  t tH
Franco-Russia Forum
Dec. 6-7 2004
hep-ph/0307029
Phys.Lett.B 571(2003) 163.
Denis Perret-Gallix
CNRS
Russian Academy of Science
micrOMEGAs
LAPP-Moscow
The relic density of Dark Matter in supersymmetry
2800 tree level processes (CalcHEP)
• WMAP data put constraints on the
Susy parametres
•LHC/ILC put constraint on Omega
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Automatic Calculations in Particle Physics
ACPP
• Mandatory for experiment designs and data interpretation
• A perfect case for International collaboration
• A pluridisciplinary program: Theory, Computing and experiments
• Very active collaboration
– AIHEP/ACAT workshops (Advanced Computing and Analysis Techniques)
– Les Houches workshops
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS
Russian Academy of Science
Automatic Calculations in Particle Physics
ACPP
Future
Higher precision predictions are required by coming projects:
LHC, ILC, super-B factory, Planck, …
• Theory developments for 1-loop, 2-loop processes
• Better interface with experiments (Standardization,…)
• Large computing power
–
–
–
–
Efficient symbolic manipulation package
Singularity tolerant numerical integration algorithm
High precision floating point calculation (quadruple/octuple precision)
High performance parallel/farm systems
Franco-Russia Forum
Dec. 6-7 2004
Denis Perret-Gallix
CNRS