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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

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


Jinr in cms physics program

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


Jinr in cms physics program

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


Jinr in cms physics program

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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    CMS CPT Organization

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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Research strategy
    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


    Research strategy1
    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


    Theoretical uncertainties for drell yan dimuon continuum
    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Research strategy2
    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


    New physics
    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


    New physics1
    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


    Tev scale gravity large extra flat dimensions add
    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


    Tev scale gravity one curve extra dimension rs1

    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


    Models with extended gauge sector
    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


    Jinr in cms physics program

    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


    Cms discovery limits

    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


    Angular distributions models distinguishing

    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


    Cms computing
    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


    Jinr in cms physics program

    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


    Cms computing at jinr
    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    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


    Jinr in cms physics program

    “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


    Jinr in cms physics program

    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


    Jinr dimuon team
    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


    Jinr cms meetings
    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


    Summary
    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


    Summary1
    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


    Summary2
    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