simulation tools for upgrades nlo pqcd (w. vogelsang) cteq6m5, dss ff pp @ 200 gev | |
TRANSCRIPT
Simulation tools for Upgrades
NLO pQCD (W. Vogelsang)CTEQ6M5, DSS FF
pp @ 200 GeV ||<1.0
q,g jetsDirect
Fragmentation (assume RAA = 0.2)
JetsPhotons
0
Counts per 2.5 GeV bin in 50B AuAu Events
Colorado
Super Phenix
Boulder
Alex, Alan, Chris, Dave, Hugo, Martin. Matt
Boulder Colorado
March 13, 2010
2010
Geant
Congratulations it’s a …. simulation
Babies first X-ray (Simulation flow)
PHPythia/PHHijing
Geant 4
Response
Reconstruction
Input Particles
Geant Hits
Detector Hits
It’s a real chain: Status can besaved on a file at any point
Detectors under studyimplemented as activevolumes – granularity isapplied later in response. Run Geant once, and thenplay with detector layoutnoise, resolution, etc.
We can overlay multiple eventsat input or geant hits level
Phool Node tree
Root File
Nice plan, but ran into problemswhen dealing with showers
Babies first drawing (B=1T or so we thought)
Single pion Pythia
Rendering bug
EmCal
Si
(Geant4 default physics processes)
Pythia
GEANT4: Q-Pythia Dijet Event
One month old @ Columbia
Single +
Nine months, Geant4 + patch01/02
Basically Super Phenix is still in its infancy
Atlas sims @CHEP 2010
7
Reconstructed secondary vertices due to hadronic interactions in minimum-bias events in the first layer of the Pixel detector(sensitive to interaction length λ complementary to γ conversion studies)
Vertex mass veto applied against γ ee, KS0 and Λ
Vertex (R, Z) resolution ~ 250 μm (R <10 cm) to ~1 mm
φ φ
Data Simulation
Pixel module
Cooling pipe
Cables
C-fibershell
Bin size: 250 μm
Already very good,
but can be im
proved !
Atlas@ICEP2010
LCG Simulation Project
E. Garutti: LCG Phy. Val. meet. 10 June 2009
CALICE Preliminary
Hadronic showers http://lcgapp.cern.ch/project/simu/:
Report at LHCC comprehensive review , Feb 2010
What do we have now
• The same as we had in April (with newest G4 patch from Sept 2010)
• Implement your own – no problem as long as it’s a perfect cylinder or a rectangular box and made of standard materials
• At least it’s modular and integrated into our software framework, so you can easily include/drop detectors on a macro level
•Make it a model for next generation phenix code• Use only a subset of PHENIX code• 64 bit from the beginning• Database for material/geometry• New root version•Tap into all the work which has been done for LHC (e.g. interface to event Generators, geometry for embedding)•Investigate grid computing•basically avoid all mistakes we made with our previous sims
Todo
Geant4 is not your old so-sowhatever simulation tool anymorewhich can be ignored because youknow better. It will help us to makeinformed decisions about ourdetector design