Transcript Report of PAC for Particle Physics

Report of PAC for Particle Physics
T. Hallman
JINR Scientific Council Meeting
January 19-20, 2006
Dubna, Russia
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Recommendations on New Projects
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The PAC recommends approval of the project “Measurement of the rare decay
K+  +  ̅ in the experiment at the CERN SPS (project OKAPI)” with first
priority until the end of 2006 (10% measurement of CKM parameter |Vtd|)
The PAC recommends approval of the project “Experiments with charged
kaons at the separated kaon beam of IHEP’s accelerator (project OKA) for
execution with first priority until the end of 2006 (rare charged kaon decays
(e.g. k+  e+  better senstivity by 2 orders of magnitude); low energy hadron
interactions for tests of ChPT, Lattice QCD, CP violation in charge conjugate
decays)
The PAC recommends approval of the project “A study of asymmetries of the
spin and structure-dependent interactions of nucleons with polarized targets
and beams (project NN and GDH)” for execution with first priority until the end
of 2006 (three-nucleon forces in few body interactions; verification of GDH
sum rule).
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Recommendations on Current Experiments
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Projects scheduled for review in 2005 recommended to be continued
until the end of 2006:
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Development of the Nuclotron Accelerator Complex (first priority)
Dirac (first priority)
NIS (first priority)
TUS (second priority)
ALPOM (first priority)
pHe3 (first priority)
MARUSYA (first priority)
Leading particles (second priority)
Development of accelerators for radiation technologies (second priority)
Analytical and methodological work to assess the prospects of scientific research
and cooperation in the main directions of JINR’s development (second priority) 3
Recommendations on Closing Experiments
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The PAC recommends closure of the following activities:
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DELPHI
HARP/PS214
PoLID
NN- interactions
HYPERON-M
HERA-B
GAMMA-2
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CERES/NA45
EXCHARM-II
DISK
WASA
BES
KAPPA
SINGLET
Energy Plus Transmutation
15-20% reduction in No. of projects
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JINR Particle Physics
road map
Draft
The role of the Road Map is to:
 ensure scientific excellence of JINR
 maximize the scientific output within the resources
 support and develop existing facilities and infrastructure
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Worldwide Priorities in particle
physics
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the origin of mass;
the properties of neutrinos;
the properties of the strong interaction
including properties of nuclear matter;
the origin of the matter-antimatter
asymmetry in the universe;
the unification of particles and forces
including gravity;
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Search for the HIGGS; Origin of Mass; Super Symmetry
JINR bears
Full Responsibility
JINR
Participate
Participates
ME1/1
SE
HE
JINR in the CMS Physics Program
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JINR in CMS Physics
The field of special interest of Dubna group is study of Drell-Yan processes in the large
invariant mass region
The idea is to test Standard Model calculations for muon pairs production up to the
highest reachable invariant masses
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Many theoretical predictions suggest possible violation of the SM
Unique opportunity to test the SM up to 3-5 TeV mass region (Tevatron region is
limited only of 0.8 TeV)
Study facilitated by excellent performance of CMS Muon system
Possibility of strong theoretical support of this research program st JINR
At the stage of data taking and physics analysis JINR CMS project will be organized as a joint effort of
several groups from LPP, LHE, LPP and LIT distributed following task forces:
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Data taking and technical support group (LPP and LHC)
Input data control and processing (production) (P.Moissenz + 4,LPP)
Data processing (V.Korenkov + 5, LIT)
Physics analysis (S.Shmatov + 5, LPP)
Theoretical support (O.Teryaev, D.Bardin, BLTP)
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Search for the HIGGS; Origin of Mass; Super Symmetry
The ATLAS Detector at the CERN LHC
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Preparing to do science with ATLAS
Some JINR topics are the following:
Search for the SM Higgs boson with the ATLAS detector via the process H → 4μ
(G.Chelkov, I.Boiko, K.Nikolaev, R.Sadikov)
Other Dubna proposals are to utilize the ATLAS large-mass Higgs
discovery potential by means of reactions H→2W→2l, or H→2W→l jj
(Yu.Kulchitsky) and H→2Z→2l , or H→2Z→lljj (V.Vinogradov) on
the basis of the already simulated ATLAS DC1 and DC2 data. The proposals
rely on the Higgs boson production via the Vector Boson Fusion mechanism
(the two accompanied forward jets allows very good background reduction)
and on the maximal Higgs boson decay rates into WW- or ZZ-pair at
MHIGGS = 400 -- 1000 GeV.
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JINR preparations for physics with ATLAS : H  μμμμ
Study of Higgs Boson Decays
H  μμμμ
(Boyko I., Chelkov G., Nikolaev
K.)
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Using the full simulation of
ATLAS detector
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Study effects of pile-up
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Background study.
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JINR Preparations for science with ALICE
TRD
Electron ID
MUON
m+m- pairs
PHOS
g, 0
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Planned JINR Scientific Analyses on ALICE
1. Study of hot and dense nuclear matter in nuclear –
nuclear (AA) collisions in the frame of QCD predictions:
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Light resonance ( , , ) production; Chiral symmetry
restoration;
Particle correlations; Space-time evolution and interferometry
(HBT) measurements.
Heavy-quark and quarkonium ( J/,  families) production.
Quarkonium suppression (Dimuons decay mode; Di-electrons
decay mode).
Direct photon production. ‘Prompt’ photon characteristics and
two-photons correlation.
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Physics Simulation in ALICE -- Particle Identification:
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Particle identification with Inner
Tracking System and Time
Projection Chamber
480 HIJING events
Simulation of Φ  K+K- including
the tracking and detector (ITS,TPC)
efficiencies
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Development of New Cluster finder
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Finding Algorithm
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The Study of the HBT Correlations
480 HIJING events
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Physics With ALICE
Effective mass distribution
of (K+K-) paires.
Particle identification
switched on!
The resonance peak after
(K+K+) background subtraction.
Mass and width BW fit parameters
are respectively:
1019.60 ± 0.04 MeV and
4.30 ± 0.12 MeV.
For the BW fit the gaussian effective mass resolution (1.23 MeV) has been taken
into account by a convolution of BW and gaussian functions..
The S/B increases from 0.5% at the lowest pT(K+K-) < 0.6 GeV/c to 6.2% at
the highest pt > 2.2 GeV/c with the significance (S / S + B ) equal to 120.
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Detection of Upsilons in p-Pb and Pb-p collisions in
ALICE muon spectrometer ( pt m > 3GeV/c)
bb̃ BGR & Signal
p-Pb
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High-throughput Telecommunication
Data Links and Local Area Network Backbone
Development of external JINR
computer communications: a) a
high-speed 1 Gbps JINR-Moscow
data link, b) JINR participation in the
new-generation research computer
network with Russian and
international (GLORIAD, GEANT)
segments for provision of JINR’s
activities, c) integration with the
educational network of Dubna.
1Gbps
link to Moscow
2 November - Test run started
At present the JINR LAN comprises more
than 5300 computers and nodes.
Main goal: carrying out organizational and
technical measures to provide the 1 Gbps
data transfer rate across the JINR LAN.
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Central computer complex and Grid segment
- Development of the JINR CICC as a core of the distributed infrastructure,
used by 17 experiments (ATLAS, CMS, ALICE, HARP, COMPASS, DIRAC, D0,
NEMO, OPERA, HERMES, H1, NA48, HERA-B, STAR, KLOD, etc.)
- Development of distributed computing infrastructure according to the
requirements of collaborations and users of the JINR CICC as tabulated:
Year
2005
2006
2007
2010
2015
660
1000
4000
10000
Disk Space(TB) 50
200
400
800
4000
Tape(TB)
50
450
1000
6000
CPU(kSI2000)
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LHC Computing Grid Project (LCG)
• LCG software testing;
• evaluation of new Grid technologies (e.g. Globus toolkit 3) in a
context of using in the LCG;
• event generators repository, data base of physical events:
support and development.
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LIT support of LHC
experiments on CCIC:
Tier1/2 Network Topology
ALICE - the software developed
by collaboration:
AliEn2 - Data Challenge;
own versions of ROOT;
AliRoot, Geant3, FLUKA - analysis
and processing
CMS - the software at LCG-2:
VO-cms-CMKIN
VO-cms-OSCAR
VO-cms-ORCA
ATLAS - the software:
ATHENA (release 9.0.0 and
higher), ROOT 4.04/02;
TDAQ Monitoring and Control
sub-systems; farm management
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Conclusions
 Preparations are underway to realize the benefit
of JINR’s contributions to the LHC and play a central role
in the scientific programs of CMS, ALICE, and ATLAS
 Activity getting underway to support a leading participation in the
International Linear Collider
 The exercise commissioned by the Directorate at the suggestion of
the Scientific Council to streamline the particle physics program
by reviewing the scientific priorities of the projects within the
context of a realistic budget is continuing
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