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Report of PAC for Particle Physics

Report of PAC for Particle Physics. T. Hallman JINR Scientific Council Meeting January 20-21, 2005 Dubna, Russia. Outline of this Talk. Recent decisions taken at the November meeting Planned exercise to set scientific priorities for the projects

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Report of PAC for Particle Physics

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  1. Report of PAC for Particle Physics T. Hallman JINR Scientific Council Meeting January 20-21, 2005 Dubna, Russia

  2. Outline of this Talk • Recent decisions taken at the November meeting • Planned exercise to set scientific priorities for the projects • Information on physics topics that will be investigated in external experiments

  3. Recommendations on New Projects • The PAC recommends approval of the project “Lifetime of +  - and ± k atoms to test low energy QCD” (an addendum to the DIRAC project) for execution with first priority until 2005. This addendum can be approved for a longer time in the future provided the DIRAC studies of lifetime of + - atomsare fully completed in 2005.

  4. Recommendations on New Projects • The PAC recommends approval of the project “Search and study of eta-mesonic nuclei in pA-reactions at the Nuclotron” for execution until the end of 2007, with first priority until 2005. • The PAC recommends approval of the opening of the new theme “Mathematical support of experimental and theoretical studies conducted by JINR” for execution until 2007 with first priority in 2005.

  5. Recommendations on Current Experiments • The PAC strongly recommends to make the Movable Polarized Target (PPM) available to the experiments as soon as possible and requests the Directorate ensure that adequate resources are available for the realization of this project. • The PAC notes the physics results obtained in NA49 and recommends continuation of JINR’s participation in this activity. • The PAC note the physics results obtained on the PHENIX project and recommends continuation of JINR’s participation in this activity. • The PAC notes the successful R&D carried out with CLIC, as well as the creation of a millimeter test range facility; the start of experimental data taking as well as R&D for a submillimeter-wavelength range. Taking into account the importance of this work…the PAC recommends approval of this project up to 2007 with first priority in 2005. • The PAC takes note of the status report on the TUS project (JINR’s participation) and on the development of a proposal for the NUCLEON project. The PAC recommends continuation of JINR’s participation in the TUS project with first priority until the end of 2005. The authors are invited to present a proposal for NUCLEON ar the next meeting of the PAC.

  6. Setting Scientific Priorities Within the Program • "The Scientific Council would like the PACs to set scientific priorities, in light of budgets requested for the projects, being informed by the Directorate of the global financial situation, and the resources they propose to distribute to different fields of research…”

  7. Setting Scientific Priorities Within the Program • An internal committee, Chaired by Prof. Igor Savin, will be commissioned to review the projects and recommend changes. The recommendation of the internal committee will be provided to the PAC at the November meeting. • In addition the PAC, in response to the following charge from Vice-Director Sissakian will provide helpful guidance at the beginning of this process by providing input concerning the scientific priorities of the projects.

  8. Setting Scientific Priorities Within the Program Dear Professor Hallman: In accordance with the recommendation of the Scientific Council at its meeting of 3-4 June, 2004, I am asking that the Program Advisory Committee for Particle Physics provide guidance on the scientific priorities for approved projects in the JINR particle physics program. The primary purpose of this exercise is to seek input from the PAC on the significance, quality, and promise of ongoing and planned research in the context of maintaining a world-class particle physics research program at JINR. In carrying out this charge, the PAC is requested to comment on each project concerning whether it is: First Priority: absolutely essential, compelling research that "must be done" to support world leadership by JINR in particle and nuclear physics Second Budgetary Priority: excellent, forefront research by JINR scientists which should be supported with high priority Second Non-Budgetary Priority: important scientific research which should be carried out if resources permit

  9. Setting Scientific Priorities Within the Program In making this determination, the PAC should evaluate the following: 1)  Scientific significance of the research project in a world view 2)  Strength of the JINR scientific contribution to the project 3)  Demonstrated achievement and future promise of JINR scientific team on the project; strength of the team involved in the project (experience, reputation) 4)  Extent to which the project contributes to the scientific life of JINR in Dubna The comments of the PAC will constitute essential input for the effort at JINR to shape a world-class research programme which is fits within the constraint of available resources. I greatly appreciate the willingness of the PAC to assist the Directorate in making this important determination. I look forward to an informative report.         Sincerely, A. Sissakian

  10. JINR bears JINR bears JINR bears JINR bears JINR JINR JINR JINR Full Responsibility Full Responsibility Full Responsibility Full Responsibility Participate Participates Participate Participate ME1/1 ME1/1 ME1/1 SE SE SE HE HE HE Search for the HIGGS; Origin of Mass; Super Symmetry JINR in the CMS Physics Program

  11. JINR in CMS Physics The field of special interest of the Dubna group is study of Drell- Yan processes in the large invariant mass region The idea is to test Standard Model calculations for muon pair production up to the highest invariant mass accessible This task is attractive because: • There are many theoretical predictions of violations of the SM • There is no competition for the 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 the Dubna theoretical school to support this research program This activity of the JINR group is very visible in CMS ~ 20 contributions on these issues at CMS week and other conferences in 2004 alone.

  12. Research Strategy The strategy of this investigation is model-independent precision measurement of di-muon spectra and comparison of the data with theoretical calculations within the Standard Model. This strategy includes the following main research directions: • Theoretical support • calculations of SM di-muon continuum • QCD and EW high-order corrections • PDF’s uncertainties: status and perspectives • modern tends in physics beyond the SM (conceptions, models, event generators) • Experimental studies of di-muons • 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

  13. JINR in CMS Physics • JINR physicists are very well integrated in the CMS CPT • (computing / physics / triggering) project • They take part in • Calibration • Development of core and reconstruction software • Development of data processing and analysis scenarios In particular, JINR physicists are involved in the tasks related to: • B-physics • QCD (jet physics) • Heavy Ion (QGP) physics

  14. CMS Computing at JINR The unprecedented LHC research program can not be carried out with even the most advanced conventional computing facilities 1 CMS event = 1 MB 100-200 events will recorded in 1 sec ~ 21015 B/year (2 PetaB/year) To support the LHC research programme next generation computing network organization based on the GRID concept is under development (LCG project) In JINR, this activity was started by LIT since the very beginning of the CMS project JINR is on of the founder of RDMS LHC Regional Computer Center At present, JINR computer facilities are well integrated into the LCG project

  15. MYRINET cluster COMMON PC-farm LHC INTERACTIVE PC-farm LCG JINR Central Complex for Information andComputing 6 – Interactive 18 – Common PC-farm 30 – LHC 14 – MYRINET (Parallel) 20 – LCG 20 – File servers 8 – LCG-user interface

  16. JINR plans for physics with CMS At the stage of data taking and physics analysis, the JINR CMS project will be organized as a joint effort between several groups from LPP, LHE, LPP and LIT with tasks distributed along the following lines: • 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) These groups already exist, most physicists are below 35 Permanent weekly seminar in LPP, each Wednesday at 15:00 Planned monthly meeting with other RDMS physicists Annual RDMS Conferences: VII – December 2002 in IHEP, Protvino VIII – December 2003 in JINR, Dubna IX – December 2004 in NCHEPP, Minsk X – December 2005 in PNPI, St.-Petersburg

  17. TRD Electron ID MUON m+m- pairs PHOS g,p0 JINR preparations for science with ALICE

  18. Planned JINR Scientific Analyses on ALICE 1.Study of hot and dense nuclear matter in nuclear (AA) collisions in the frame of QCD predictions: • Light resonance ( , , ) production; chiral symmetry restoration • Particle correlations; space-time evolution and interferometry measurements • Heavy-quark and quarkonium ( J/,  families) production. Quarkonium suppression (Di-muon decay mode; Di-electron decay mode) • Direct photon production; ‘Prompt’ photon characteristics and two-photon correlations

  19. Planned JINR Scientific Analyses on ALICE Study of proton - nucleus (pA) and proton – proton (pp) collisions. pA and pp measurements as a benchmark for heavy ion physics • Light resonance production and particle correlations • Di-muon decay mode • Di-electron decay mode • Charged particle multiplicity distributions; very high multiplicity.

  20. LHC Computing • JINR team has taken responsibility to organize the Physics Data Challenge for all ALICE Institutes situated in Russia • Physics Data Challenge: March - August 2004 107 events processed • LHC Computing GRID (LCG) activity (deployment, test) Processed jobs by JINR ~ 2500 Erroneous jobs on JINR site ~ 404 Possible explanation – the RAM capacity of 2 processors batch node (512MB) was insufficient for processing of two AliRoot jobs.

  21. Physics Simulation in ALICE -- Particle Identification: 480 HIJINGevents Particle identification with Inner Tracking System and Time Projection Chamber Simulation ofΦ  K+K- including the tracking and detector (ITS,TPC) efficiencies Development of New Cluster Finding Algorithm The Study of the HBT Correlations 480 HIJINGevents

  22. Physics With ALICE Effective mass distribution of (K+K-) pairs. 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 equal to 120.

  23. Detection of the Upsilon in p-Pb and Pb-p collisions in the ALICE muon spectrometer( ptm > 3GeV/c) bb̃BGR & Signal p-Pb

  24. The ATLAS Detector at the CERN LHC Search for the HIGGS; Origin of Mass; Super Symmetry

  25. Scientific authors from JINR/Dubna (2005) • Alexandrov I.,Bardin D., Bednjakov V., Boyko I., Budagov J., Chelkov G., Evtukhovich P., Flyagin V., Glonti G., Gostkin M., Grigalashvili N., Kalinovskaja I., Kazarinov M., Kekelidze G., Khovansky N., Kotov S., Kotov V., Krumstein Z., Kukhtin V., Ladygin E., Lazarev A., Manjavidze I., Minashvili I., Mineev M., Nanava G., Neganov A., Olshevski A., Peshekhonov V., Pisarev I., Romanov V., Rusakovich N., Rybaltchenko K., Sissakian A., Tchepournov V., Topilin N., Usov Y., Vinogradov V. • + graduated students: Arabidze G., Barashkou A., Dedovich D., Demichev M., Elagin A., Guskov A., Nikolaev K., Kruchonak V., Ilushenko E., Khartchenko D., Khoriauli G., Khramov E., Kolesnikov B., Kruchonak V., Potrap I., Rumjantsev L., Sadykov R., Tonojan A., ZhemchugovA.

  26. Preparing to do science with ATLAS • Physics simulations and new research proposals of the ATLAS-JINR • group were discussed at the two workshops on the ATLAS physics program • (Dubna--April and November, 2004). The main topics are the following: • Search for the SM Higgs boson with the ATLAS detector via the processH → 4μ • (G.Chelkov, I.Boiko, K.Nikolaev, R.Sadikov) • Study of the the ATLAS large-mass Higgs discovery potential by means • of the reactionsH→2W→2l, orH→2W→l jj (Yu.Kulchitsky) and • H→2Z→2l , or H→2Z→lljj(V.Vinogradov). These studies were based on • simulated ATLAS DC1 and DC2 data. They rely on the Higgs boson production • via the Vector Boson Fusion mechanism (the two accompanying forward • jets allow very good background reduction) and on the maximal Higgs • boson decay rates into WW- or ZZ-pair at MHIGGS = 400 -- 1000 GeV.

  27. JINR preparations for physics with ATLAS : H  μμμμ Study of Higgs Boson Decays H  μμμμ (Boyko I., Chelkov G., Nikolaev K.) • Using the full simulation of ATLAS detector • Study effects of pile-up (first time in ATLAS!) • Background study. Preprint JINR (Р1-2004-44)

  28. Preparing to do science with ATLAS The possibility of investigating the quark-gluon structure functions with the ATLAS detector by means of simultaneous registration of a direct photon (or Z-boson) and jets (so called "gamma/Z+jet"events) is being studied byD.Bandurin and N.Skatchkov. An HEP (semi-)analytical calculation tool for the LHC (Project SANC: Support of Analytical and Numerical Calculations for Experiments at Colliders) is being Developed by: D.Bardin, L.Kalinovskaya, P.Christova, G.Nanava A.Andonov (DLNP, JINR), A.Arbuzov, S.Bondarenko (BLTF, JINR)and V.Kolesnikov (PhD student, UNC, JINR). This a work in progress which promises to be useful for development of the JINR-ATLAS physical program in the near future. Physical verification of the SM electric charge of the top-quark (+2/3) with the ATLAS detector utilizing lepton-jet top decay channels(N.Russakovich, V.Bednyakov ,E.Khromov, A.Tonoyan).

  29. Preparing to do science with ATLAS Evaluation of the next-to-leading order QCD corrections to single top- and top-anti top quark production together with an estimation of the associated top-Higgs production (in pp-interactions) are being studied byA.Akhmedov. Aspects of research on top- and Higgs boson production and the search for the exotic phenomena at the LHC are being explored byZ.Usubov. Theory and phenomenology of ATLAS physics with the Higgs bosons, extra gauge bosons and (very) heavy quarkonia states as well as a the theory of the multi-particle correlations during particle production is being studied by G.Kozlov. A possible monopole search with the ATLAS detector is being explored by Yu.Kurochkin (Minsk). Diffractive Higgs production and the search for the virtual electroweak effects with ATLAS are being studied by I.Satsunkevich (Minsk). V.Gilevsky (Minsk) is studying general parameterization of 4-boson vertex and its importance for collider physics. P.Starovoitov (Minsk) is examining the two-photon mechanism of Drell-Yan lepton pair production in pp-collisions and has demonstrated that its contribution is not negligible. These are ongoing theoretical studies that still need to be simulated in ATLAS.

  30. JINR Physics at the Tevatron • D0(Alexeev +10) • QCD: development of a method for direct jet energy scalecalibration (JES) • Direct photons (Pt spectrum) • Structure function measurment in new kinematic region • Bphysics: - development of methods for efficient low pTtracking(needed for • detecting soft final state pions and protons) • Search for Xi_b cascade hyperon in exclusive decay channel Xi_b  J/psi + Xi. • Software tools development and some analysis is done in Dubna; the main analysis at FNAL • CDF(Budagov +12) • JINR CDF groups are heavily involved in the measurement of top quark mass in lepton-lepton and lepton-jet channels • Data analysis is performed equally at Fermilab and Dubna

  31. Experimental programs for discussion at a future meeting: NA48 HADES H1 CBM HERAB WASA STAR NIS PHENIX COMPASS CBM DIRAC PANDA HARP TUS NA45 NA49 Underway Mature Efforts Future Prospects

  32. Conclusions • Aggressive 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 • An important exercise has now been commissioned by Vice-Director Sissakian at the suggestion of the Scientific Council to have the PAC For Particle Physics comment on the scientific priorities of the projects within the context of a realistic budget

  33. Backup Slides

  34. SM dimuon continuum calculations at present Uncertainties are coming from • QCD and EW corrections (up to 6 % for 3 TeV) • Parton Density Functions InternalPDF uncertainties are dominant for the large invariant range! ~ 6 % for 1 TeV masses ~ 12 % for 3 TeV masses The PDF needs to be measured more precisely in the large x and Q2 region

  35. IHEP SPbSU PNPI KIAE JINR INR CERN server Configuration of AliEn sites in Russia 04Q2– >4 AliEn operators at work stations ITEP

  36. JINR-IAP FEM OSCILLATOR CLIC: Test facility for the investigation of heating RF-damage effect in linear colliders • Results of 2002 • The 30 GHz FEM demonstrated the required characteristics (RF power and pulse length, operational stability, RF parameters deviations and repetition rate) • The RF test equipment was installed in a test area. • The overall test stand (FEM and RF test equipment) was assembled and tuned • First RF pulsed heating experiments started in order to successfully move to • the second study stage of the project. • Program for 2003 • Scheduled routine tests to achieve the required integrated statistical level (~106 RF pulses) required for the third study stage of the project. • Discussion of the experimental results and future plans.

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