PAC on PARTICLE PHYSICS 34th meeting, January 25-26, 2011 Recommandations and work towards the optimisation of the research programme 16/II/20111Egle Tomasi-Gustafsson Scientific Council, Dubna, 16/II/2011

The PAC congratulates the VBLHEP accelerator team for the significant progress in developing the accelerator complex and for the fulfillment of obligations for the Nuclotron-M project (december run). …the PAC encourages to publish an international call for experiments at the Nuclotron-M. 16/II/2011Egle Tomasi-Gustafsson2 II. Recommendations on the Nuclotron- NICA projects G. Trubnikov

3 3 Nuclotron Collider C = 547 m Fixed target experiments SPI & LU-20 (“Old” linac) Synchrophasotron yoke Beam transfer lines & New research area KRION-6T & HILac 2.5 m 4.0 m Booster Nuclotron beam transfer line MPD Spin Physics Detector (SPD) NICA accelerator facility (leader I.Meshkov) Preliminary layout G.Trubnikov, Nuclotron-M/NICA status January, 2011 JINR PP PAC

V. Recommendations (Report) from MAC P. Zenkevich The design of the NICA project is progressing well. Significant modifications for the concept of the NICA collider have been adopted. progress in developing a new lattice for the collider and the ring design. timeline ? The PAC suggests considering a possible extension to Electron Ion Collider option in the current design. 16/II/2011Egle Tomasi-Gustafsson4

V. Recommendations for new projects (I) Nuclotron/Nica G. Trubnikov The PAC approves the proposed programme, strategy and schedule, and recommends approval of this project with first priority for execution until the end of Priorities: – Design the injector complex Linac-Booster to present- day particle intensities. – Detector for fixed target experiments : high precision 1–5 AGeV physics > – Fair return of its LHC and RHIC investments, especially in the field of electronics and readout. 16/II/2011Egle Tomasi-Gustafsson5

Recommendations on the progress towards the NICA White Paper (I) A. Sorin The PAC notes the progress reached in this direction and the emergence of new interesting proposals. It recommends a synthesis of this work to be done … taking into account the competitiveness and complementarity with the research at CERN, RHIC, and GSI. 16/II/2011Egle Tomasi-Gustafsson6

III. Recommendations on the progress towards the NICA White Paper (II) A. Sorin Special efforts are needed to motivate JINR specialists to participate and to lead preparations for experiments at external beams of the Nuclotron-M. The PAC encourages the preparation of a physics programme for the fixed target experiments at this facility. 16/II/2011Egle Tomasi-Gustafsson7

V. Recommendations for new projects (II): COMPASS A. Nagajcev 16/II/2011Egle Tomasi-Gustafsson8 Drell-Yan GPD-DVCS ECAL0

V. Recommendations for new projects (II): COMPASS A. Nagajcev The PAC appreciates the results obtained by this collaboration with the participation of JINR physicists …recommends approval of JINR’s participation in this project with first priority until the end of /II/2011Egle Tomasi-Gustafsson9 JINR contribution: - data production and selection; - data selection; - support of PC farms, Monte-Carlo packages; Topics: - inclusive analysis (structure function g 1 d, QCD analysis); - gluon polarization (∆G/G); - azimuthal asymmetries in SIDIS production; - Λ and Λ-bar polarizations; - Primakoff reactions. 21 reports in International Workshops and Conferences 20 publications (8 papers in )

V. Recommendations on the JINR contributions to LHC experiments The PAC takes note of the reports on the participation of the JINR groups in the ATLAS, ALICE, and CMS experiments, presented by V. Lyubushkin, B. Batyunya, and A. Zarubin. It emphasizes the scientific significance of the results being obtained with the active participation of JINR physicists, and encourages the groups to strengthen their efforts in the data analysis and in the presentation of the results in international conferences. 16/II/2011Egle Tomasi-Gustafsson10

V. Recommendations on the JINR contributions to LHC experiments The PAC particularly appreciates the presentations be given by the young physicists who are involved in the data analysis…. Appointed dedicated referees for closer follow-up A. Cecucci (ATLAS), V. Savrin(CMS), I. Tserruya(ALICE) 16/II/2011Egle Tomasi-Gustafsson11

ALICE Set-up HMPID Muon Arm TRD PHOS PMD ITS TOF TPC Size: 16 x 26 meters Weight: 10,000 tons

CERN, 2 Dec 2010 J. Schukraft 13 Activity of Dubna group – Bose-Einstein correlations (femtoscopy physics): - Participation in the preparation of two published articles for Two-pion Bose-Einstein correlations in p-p and in Pb-Pb central collisions. - Suggestion and responsibility for an analysis of Two-charged kaons Bose-Einstein correlations. – Physics of resonances: - Participation in the creation of the analysis software. - Responsibility for the analysis using mixed-events background. – Quarkonia physics: - Participation in the analysis of J/      B.Batyunya ALICE physics publications: - 6 for p-p (mostly at 0.9 TeV), 4 for Pb-Pb ; - 12 other publications for p-p at 7 TeV coming soon on particle spectra, strange and charmed particles, two-pion Bose-Einstein correlations, J/ Ψ and light vector mesons

Two-pions Bose-Einstein Correlation results. p-p Pb-Pb(Au-Au ) (Volume of the particle source) ( Decoupling sytem time) B.Batyunya

Combinatorial background study for  to  K + K - selection. The mixed-events background package was created by Martin Vala (Dubna) for the ALICE resonance group. 18M p-p events at 7 TeV (Preliminary) B.Batyunya

Muon spectrometer Scaling of p T / for J/     (S.Grigoryan, Dubna group) (Preliminary) J/     B.Batyunya

Contribution of JINR in the whole ALICE statistics Summary (simulated & analysis )DONE events Analysis: the contribution of analysis jobs to summary DONE jobs for whole ALICE in time from April till December of 2010 was equal 60.9%, so at JINR ~ jobs have been DONE in the analysis. 250 users of ALICE, including 6 users from JINR did their analysis at JINR. V International Conference "Distributed Computing and Grid-technologies in Science and Education", Dubna, 28 June- 3 July plenary talk of Galina Shabratova “The ALICE GRID operation” - session talk of Andrey Zarochentsev “RDIG in Simulation and Analysis of ALICE Data from LHC” А. International Conference “Computing in High Energy and Nuclear Physics (CHEP2010)”, Taipey, October poster “. Distributed Russian Tier2 centre – RDIG in Simulation and Analysis of ALICE data from LHC”,presented by Galina Shabratova jobs have been DONE by JINR in time from April to December What is 1.69 % of jobs DONE by whole ALICE in the same time. B.Batyunya

16/II/2011Egle Tomasi-Gustafsson18 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson19 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson20 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson21 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson22 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson23 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson24 A. Zarubin Data processing,selection, and analysis of di-muons events

16/II/2011Egle Tomasi-Gustafsson 25 A. Zarubin

16/II/2011Egle Tomasi-Gustafsson26 A. Zarubin

16/II/2011Egle Tomasi-Gustafsson27 A. Zarubin

16/II/2011Egle Tomasi-Gustafsson28 A. Zarubin

16/II/2011Egle Tomasi-Gustafsson29 A. Zarubin

VII. Scientific reports The PAC notes with interest the reports "Is there any LSND anomaly?”, presented by A. Bolshakova, “Borexino: current results and future”, presented by O. Smirnov, and “Spin physics at NICA”, presented by O. Teryaev, and thanks the speakers. The PAC emphasizes the importance of JINR’s ongoing and planned activities in neutrino physics and related subjects. The PAC encourages the JINR Directorate to present a comprehensive programme on spin physics for the Nuclotron-M and NICA. 16/II/2011Egle Tomasi-Gustafsson30

VIII. Poster presentations by young scientists in the field of particle physics research The PAC notes with interest the poster presentations in particle physics presented by young scientists from DLNP and BLTP, and selected the poster “Prospects of SUSY observation with the ATLAS detector” presented by E. Khramov to be reported at the Scientific Council session. 16/II/2011Egle Tomasi-Gustafsson31

IX. Agenda (next meeting june 21-22) Consideration of new projects and themes Reports and recommendations on the projects to be completed in 2011 Status report on the Nuclotron-NICA and MPD projects as well as SPD proposal Report on plans for future scientific activity and proposals of experiments at the Nuclotron-NICA complex Report on progress towards the NICA White Paper Reports on the scientific results obtained by the JINR groups in the LHC experiments and plans for their future upgrades. 16/II/2011Egle Tomasi-Gustafsson32

16/II/2011Egle Tomasi-Gustafsson33 Thank you for attention Благодарю вас за внимание

New Contributions to the NICA White Paper, Draft v 4.01 (last update: )‏ Section 2: Phases of QCD matter at high baryon density 1) L.McLerran (BNL), K. Redlich, D.Blaschke (U Wroclaw, JINR): Triple point and quarkyonic phase in the QCD phase diagram 2) X.Luo (U Hefei, China; LBNL, USA), B.Mohanty (VECC, Kolkata, India), H.G.Ritter (LBNL, USA), N. Xu (LBNL, USA): Search for the QCD critical point at NICA Section 3: Hydrodynamics and hadronic observables 3) L. Turko (U Wroclaw, Poland): Dissipative hydrodynamics effects at NICA 4) F. Karsch (BNL, U Bielefeld), C. Schmidt (FIAS, GSI): Hadronic Fluctuations, freeze-out conditions and the QCD (phase) transition line 5) T.Klähn (U Wroclaw), D.Blaschke (U Wroclaw, JINR), F.Weber (U S-Diego, USA): Exploring hybrid star matter at NICA Section 11: Fixed target experiments 6) J.Aichelin (SUBATECH, U de Nantes), M.Bleicher (FIAS), E.Bratkovskaya (FIAS), C.Hartnack (SUBATECH, U de Nantes): Measurement of Elementary Cross Sections 7) Yu.Uzikov (JINR): Search for scaling onset in exclusive reactions withlightest nuclei at Nuclotron using fixed target 8) V.Friese (GSI): Measurement of strange particle production in the NICA fixed-target programme

35 4. COMPASS spectrometer. New electromagnetic calorimeter. 4. COMPASS spectrometer. New electromagnetic calorimeter. The electromagnetic calorimeter ECAL0 will supplement the COMPASS spectrometer for the GPD studies via the exclusive DVCS process µ+p  µ’+p’+γ. The main tasks of the ECAL0 are the following: - together with the ECAL1 and ECAL2, to ensure a hermiticity of the setup for photons from DVCS, - to help in reduction of a background from the SIDIS process µ+p  µ’+p’+π 0 +X, - to enlarge the kinematic domain of the DVCS registered by COMPASS. From Monte Carlo studies, the following requirements have been defined for ECAL0: – the energy range for photon detection (DVCS and background) is 0.2 to 30 GeV; – the maximum geometrical size is 2.6 × 2.6 m 2. Assuming that it is located behind of the RPD, such calorimeter will cover the polar angular range 0.3–0.6 rad; – ECAL0 should have a modular structure with the dimensions of a module cell 40 × 40 mm 2, module size – 120x120 mm 2 (9 cells); – the required energy resolution is about 10% at 1 GeV or better; – taking into account the space limitations in the target region and the rather high fringe field of the target magnet, the total length of the calorimeter should be less than 50 cm and the photodetector should be insensitive to the magnetic field.

36 6. Time lines of the Project 6. Time lines of the Project 2011: Participation in COMPASS data taking; Running of both systems MW1 and HCAL1; Development/support of MW1/HCAL1 software; Analysis of COMPASS experimental data; Construction and tests on ECAL0 matrix of 3x3 modules ; Design of frame and support of ECAL0; Preparation of final drawings of ECAL0; Design of LED-PIN control system of ECAL0; Design of temperature stabilization system of ECAL0; Participation in FEE design for ECAL : Participation in COMPASS data analysis; ECAL0 production: Module production; Frame and support production; Housing production; MAPD production and testing; LED-PIN control system production; The temperature stabilization system production; HV and LV preparation. 2013: Participation in COMPASS data taking; Assembly and testing of ECAL0; Running of systems MW1, HCAL1 and ECAL0; Development/support of MW1/HCAL1/ECAL0 software; Analysis of COMPASS experimental data; Participation in DY preparation.

37 4. COMPASS spectrometer. New electromagnetic calorimeter. 4. COMPASS spectrometer. New electromagnetic calorimeter. The calorimeter ECAL0 ( “shashlyk”)consists of 248 modules or 2232 readout channels. Multipixel Avalanche PhotoDiode (MAPD) will be used as photodetector. The ECAL0 includes also: the frame support, LED-PIN control system, temperature stabilization system, power supply and electronics. The ECAL0 module prototypes have been constructed and tested at the CERN East Hall T9 beam line and at COMPASS Hall.

JINR computing resources used by ALICE in time of first LHC runs. CPU usage from April till the end of 2010 DISK usage 35% 29% 28% 8% PledgedAllocatedUsed DISK(TB)

16/II/2011Egle Tomasi-Gustafsson39 Vladimir Lyubushkin

16/II/2011Egle Tomasi-Gustafsson40 A. Zarubin

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16/II/2011Egle Tomasi-Gustafsson43 A. Bolshakova