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JINR in CMS Physics Program

JINR in CMS Physics Program. I.A. Golutvin 97 th Session of the JINR Scientific Council, January 21, 2005. RDMS Participation in CMS Project. Since more than 10 years JINR as a member of Russia and Dubna Member State (RDMS) collaboration has participated in CMS.

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JINR in CMS Physics Program

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  1. JINR in CMS Physics Program I.A. Golutvin 97th Session of the JINR Scientific Council, January 21, 2005 I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  2. RDMS Participation in CMS Project Since more than 10 years JINR as a member of Russia and Dubna Member State (RDMS) collaboration has participated in CMS I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  3. RDMS Participation in CMS Construction RDMS bears Full Responsibility RDMS Participates ME1/1 ME SE EE HE HF FS The main obligations of RDMS are focused at endcaps 1.3    5.5, i.e. covers the most kinematics range of CMS I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  4. RDMS Contribution to CMS • Total RDMS contribution in CMS is 21,373 MCHF • Total JINR contribution in CMS is 13.257 MCHF • from JINR budget: 7.115 MCHF • from special RF budget through JINR: 6.142 MCHF I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  5. RDMS Participation in CMS By the end of 2004 most of RDMS (JINR) obligations are successfully fulfilled. Both endcap HE and 76 ME1/1 chambers have been already delivered to CERN. Assembly of apparatus and commissioning of subsystems are in full swing Fall 2005: full assembly and magnet test of the whole CMS Detector in the surface hall SX-5 Spring 2006: start of lowering by pieces (< 2000 ton each) to the shaft (~80 m under ground) Summer 2007: physics starts I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  6. Inner Endcap Integration/Installation JINR is actively participating in CMS Assembly, Installation and Commissioning in the surface hall SX5 The main focus is Inner Endcap – the most difficult part of CMS Integration I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  7. Endcap Muon System,ME ME2/1 Installation at SX5 I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  8. LHC Physics Perspectives The LHC physics perspectives are unprecedented: conditions of early Universe starting 10-21 sec after Big Bang (T=1022 K) will be recreated ! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  9. LHC Physics Perspectives • The goal of LHC Program is to attack well-known open • questions in Physics: • Mass: why do fundamental particles have masses and why these masses are such different? • Antimatter: why at the present days matter dominates antimatter? • Dark matter: where is concentrated the hidden mass of Universe? • World geometry: are there extra dimensions? bulk volume geometry? • New particles: do they exist? (sparticles, extra gauge bosons, graviton states etc) • QCD matter: what are the properties of QCD at extreme high densities, does QGP exist? Standard model: validity bounds  high precision tests of SM ! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  10. Towards to Physics Since more than 10 years many physicists and engineers have extended much labor on the construction of the CMS Detector As a result of this effort the CMS Detector will be ready in time The CMS pilot run is already in 2007 I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  11. Towards to Physics Now the CMS physics program is the first priority task for RDMS In line with huge amount of work on the CMS assembly and installation JINR physicists participate in development of Physics Research program with CMS detector We believe RDMS physicists will get a similar position in CMS Research Program as in the Detector Construction I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  12. Towards to Physics It goes without saying JINR physicists as well as the whole RDMS group should be integrated in CMS where physics program is now organized as a special CPT project: Computing, Physics, Triggering I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  13. CMS CPT Organization I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  14. RDMS Participation in CPT Again RDMS strategy is the same as it was during the CMS construction Being well integrated in the CMS CPT (computing/ physics/triggering) project RDMS will concentrate efforts at only few topics I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  15. RDMS Task Force • RDMS Physics Task Force (RDMS physics project) was set up several years ago to focus main efforts of RDMS physicists at only a few physics tasks, mainly: • Dimuon with large masses • WW fusion • Top quark physics • Dimuon resonance states in Heavy Ion • The goal is full study of these selected channels starting from theoretical aspects and simulation up to the final physics results I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  16. RDMS Task Force This activity is very well visible in CMS collaboration Visibility of individual groups in a huge collaboration is the only way to make CMS attractive for young talented physicists. Otherwise they will go to other fields. I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  17. JINR in CMS Physics • Indeed JINR and Member States physicists are very well integrated • in CMS CPT (computing/physics/triggering) project • They play an important role in • Calibration • Development of core and reconstruction software • Development of data processing and analysis scenarios In particular, JINR and Member States physicists are involved in the several tasks: • B-physics (BsJ/ +- K+K-) – JINR + Belarus • Higgs (ZZ  ll) – Ukraine • QCD (jet physics, diffraction) – JINR + Armenia + Belarus • Heavy Ions – JINR + Georgia I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  18. 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 We select this task because of following reasons: • There are many theoretical prediction to violation of SM • There is no competitors to LHC  unique opportunity to test the SM up to 35 TeV mass region (Tevatron region is limited only of 0.8 TeV) • Excellent performance of CMS Muon system • Potential of Dubna theoretical school to support this research program This activity of JINR group is very well visible in CMS more than 20 contributions on these issues at CMS weeks and conferences only in 2004 I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  19. Research Strategy The strategy of this investigation is model independent precise measurements of dimuon spectra and comparison of obtained data with theoretical calculations within the Standard Model I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  20. Research Strategy This strategy includes the following main research direction: • Theoretical support • calculations of SM dimuon continuum • QCD and EW high-order corrections • PDF’s uncertainties: status and perspectives • modern trends in physics beyond the SM (conceptions, models, event generators) • Experimental studies of dimuons • Development of reconstruction and analysis software • a few % momentum resolution of TeV muon and dimuon pairs • high track (and dimuon) reconstruction efficiency • Data pre-processing and analysis • Calibration and analysis • Trigger • Beam and cosmic tests • Computing • Farm and network supporting (hardware and core software) • Scenario of data processing and analysis We want to examine SM with the best reachable accuracy ! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  21. Theoretical uncertainties for Drell-Yan dimuon continuum SM dimuon continuum calculations at now Uncertainties are coming from • QCD and EW corrections (up to 6 % for 3 TeV) • Parton Density Functions InternalPDF uncertainties are dominated for the large invariant mass range! ~ 6 % for 1 TeV masses ~ 12 % for 3 TeV masses We need to measure the PDF more precisely in the large x and Q2 region !!! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  22. CMS high-pT muon performance • High-energy muon features: • Huge bremsstrahlung and EM showering large secondaries (muon looks like an electron) • Small multiple scattering TeV muon in CMS muon stations The current pT resolution is ~ 4 % for 1 TeV muon (in central pseudorapidity region ) The angle resolution is better than 0.5 % Algorithm improvements are coming on! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  23. Statistical errors Tevatron region Mass limit at LHC ~ 5 TeV (0.8 TeV for Tevatron) L1 HLT Physics of Standard Model The DY rate in TeV mass region is very small ~ 103 events/year (10-6 of stored events) If case of “new physics” the rate can be increased by factor of 10-100 Higgs Physics, SUSY Physic beyond the SM DY Mass reach scale I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  24. Expected Uncertainties Theoretical uncertainties • QCD corrections • EW corrections • PDF’s Detector and algorithm inefficiencies • Trigger and reconstruction inefficiencies • Goodness of reconstruction algorithms • Misalignment and quality of digitization, track reconstruction and track parameters calculation For a moment the theoretical uncertainties (~ 4-12 %) dominate systematic detector errors (3-6 %)  need to be decreased If new physics exists, requirements for dimuon accuracy can be relaxed ! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  25. Research Strategy This strategy allows to measure SM dimuon continuum with a few percent accuracy ANY DEVIATIONS ABOVE THE UNCERTAINTY BAND WILL INDICATE ON NEW PHYSICS !!! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  26. New PHYSICS ? Open questions in Standard Model: • Free parameters in Standard Model (too many - 25 - constants) can not be fixed in the framework of SM • Hierarchy problem (huge gap between Electroweak (102 GeV) and Planck (1019 GeV) scales) • Gravity is not incorporated in SM • SM does not eхplain cosmological problems (origin and early evolution of our Universe, up to t ~ 10-(2234) s) SM is not an “ultimate” theory ! We need to go beyond it … I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  27. New PHYSICS There exist many possible extensions of the SM and physical ideas beyond the SM (supersymmetry, gauge sector, TeV-scale gravity, others) JINR group made a thorough simulation of some: • Extended gauge sector • TeV-scale gravity I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  28. TeV-scale gravity: Large Extra Flat Dimensions (ADD) N.Arkani-Hamed, S.Dimopoulos, G.Dvali, 1998 • The real World is multi-dimensional (26 flat - Euclidian - extra spatial dimensions, the maximal total number of dimensions is 3+6=9) • New objects – branes: slices of multidimensional space (2D brane – membrane, 3D brane etc up to maximal possible 9D brane) • We (all of SM forces) live on 3D brane (there is another “parallel” hidden World) • Only gravitons are multi-dimensional A “Parallel” World Our World Graviton contributions to SM processes MS- effective planckian scale Excess above SM continuum ! I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  29. Minv, GeV TeV-scale gravity: One Curve Extra Dimension (RS1) RS1 scenario (only one LED): L.Randall, R.Sundrum, 1999 • two 3D brane Universe - our World and planckian one – in a 5 dimensional curve (noneuclidian) space – only one extra dimension: 3(brane)+1(extra)+time ! • heavy (TeV ) graviton KK-excitations - spin-2 resonance states GPl Brane apple Another brane R ~ 1/k Slice of bulk 5-D space Z c = k/Mplank ~0.01-0.1 Newton apple Brane-our 4-D world GN I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  30. Models with extended gauge sector • Extended gauge models assume wider symmetry groups than SM one (70’s-90’s) • new gauge bosons Z and W  spin-1 resonance states • a mass ~ a few TeV • the cross section and width are dependent on different model (Z, Z, Z, ZLR etc) • intensively couple into lepton pairs (muons and electron) • the muon rate from Z’ exceeds the SM background by a factor of 100 I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  31. Tevatron and LEP Limitations ADD The current lower mass limit for new resonances is 0.5-0.6 TeV Effective planckian scale lower limit (95% C.L.) is 1.3-2.5 TeV (Run II) I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  32. ADD-scenario (n flat extra dimensions) CMS Discovery Limits CMS will be able • to cover a wide (or whole) range of model parameters • to fix the energy limit of Standard Model validity RS1-scenario (two branes embedded in the curve bulk) I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  33. GKK Events Z cos* Angular distributions: Models distinguishing Angular distributions  Different spin structure ! ~ 100 fb-1of LHC operation M = 1.5 TeV I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  34. CMS Computing Unprecedented LHC Research program can not be carried out with conventional even most advanced computing facilities • 1 CMS event = 1 MB • 100-200 events will recorded in 1 sec • ~ 21015 B/year (2 PetaB/year) To support LHC Research program the new generation of Distributed Computing based on GRID technology is under development (LCG project) I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  35. Lab m Uni x CERN Tier1 Uni a UK JINR and Russia France Tier3 physics department Uni n CERN Tier2 USA Lab b Germany Italy Lab c Uni y Uni b regional group LHC Computing Modelevolving LHC Computing Structure The opportunity of Grid technology Tier1 Desktop    I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  36. CMS Computing at JINR At JINR this activity has been started on the basis of LIT since almost the very beginning of the CMS project JINR is one of the founders of the RDMS LHC Regional Computing Center At present LIT computing facility is very well integrated in the LCG project I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  37. RDMSDistributed Computing Facilities LCG Tier1/Tier2 cloud TheData Grid cloud GRID access 2003: 50 Mbit/s 2004: 100-155 Mbit/s 2007: 1-2 Gbit/s Tier-2’s Cluster FZK CERN JINR … IHEP Kharkov Gbits/s RRC KI Minsk Tier2 cluster RRC-LHC SINP MSU Regional connectivity: cloud backbone – Gbit’s/s to labs – 100–1000 Mbit/s PNPI INR RAS ITEP Collaborative centers I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  38. JINR Network Communications Provision of JINR and JINR Member States with high-speed communication links I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  39. “digi” RAW Data 1 MB/ev Simulation Data Base Condition Data Base ~ 10 TB Scenario of RDMS Data processing and analysis dimuons production for 100 fb-1 LHC operation /Tier_1 Tier_0 Tier_0/Tier_1/Tier_2 ,,e,j… GeV, cm.. ESD/DST 0.5 MB/ev Analysis Object Data 0.1 MB/ev Physics results Selection & compression & Analysis Calibration & alignment & processing Objects Reco ROOT Data (user’s files) AOD & TAG ESD/DST sample RAW Data sample 0.5 TB 0.41 TB 0.123TB RDMS Tier_2 ~ 8.9 TB Tier_0/Tier_1 Data Bases I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  40. MYRINET cluster COMMON PC-farm LHC INTERACTIVE PC-farm LCG JINR Central Complex for Information andComputing (LIT) 6 – Interactive 18 – Common PC-farm 30 – LHC 14 – MYRINET (Parallel) 20 – LCG 20 – File servers 8 – LCG-user interface Other possibility is SKIF K-1000(~ 576 processors) - ? I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  41. JINR Dimuon Team 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, BLTP and LIT distributed through following task forces: • Data taking and technical support - LPP and LHE • Input data control and processing - P.Moissenz + LPP (4) + LHE + LIT • Data processing and MC production - V.Korenkov + LIT (5) + LPP • Physics analysis - S.Shmatov + LPP (5) + LHE + LIT • Theoretical support - D.Bardin, M.Savina, O.Teryaev + BLTP + N.Shumeiko + Belarus These gropes already exist, most physicists are below 35 years old I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  42. JINR CMS Meetings Regular JINR CMS meetings: • Weekly seminar in LPP, Wednesday, 15:00 • Annual RDMS CMS Conferences: I-IV – December, 1995-1999, CERN, Geneva V – December, 2000, ITEP, Moscow VI – December, 2001, MSU, Moscow VII – December 2002, IHEP, Protvino VIII – December 2003, JINR, Dubna IX – December 2004, NCHEPP, Minsk X – September 2005,PNPI, St.-Petersburg New: • Monthly meeting with other RDMS and CMS physicists I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  43. Summary Rich CMS program covers the widest range of physics issues: Standard Model, Higgs, SUSY, Exotic, TeV-scale gravity, Heavy Ions There are open questions in Standard Model SM is not an “ultimate” theory ! We need to go beyond it … I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  44. Summary In additional to active participation in the CMS general Physics Project JINR group has decided to make a model independent test of Standard Model by measuring production of Drell-Yan pairs in the TeV region • It is a very difficult research– many JINR and Member States physicists have already combined efforts on this field • Appropriate computer facilitiesis under development in Laboratory of Information Technologies • We very much count on a valuable support of BLTP We believe CMS will be able to improve considerably the present bounds on the existence of new objects in the TeV region or to discover them if they exist in this scale I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

  45. Summary Thanks to JINR Directorate Acad. V.G.Kadyshevsky and Prof. A.N.Sisakian for permanent support of RDMS CMS project since the very beginning I.A. Golutvin, "JINR in CMS Physics Program", 97th Session of the JINR Scientific Council, January 21, 2005

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