Docstoc

Leitch.ppt - Los Alamos National Laboratory

Document Sample
Leitch.ppt - Los Alamos National Laboratory Powered By Docstoc
					LANL
Nuclear
Physics




 Heavy Ion, Cold Nuclear Matter &
     Spin Physics Programs
                             Mike Leitch
          Physics Division, Los Alamos National Laboratory
LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
Nuclear
Physics                        Outline

• Personal, activities, collaborators
• Physics highlights
    – dAu & AA J/’s
    – 1st Upsilons at RHIC
    – J/ spin asymmetry in polarized p+p
    – Hadron correlations
    – CMS/LHC gamma-jet studies
• Technical accomplishments
    – Muon tracker operations
    – Forward Silicon Vertex detector upgrade
• Future goals
• Budget
  LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
  Nuclear
  Physics                   Current Personnel

Physics Analysis
  Brooks, Butsyk(PD), Camacho(PD), Constantin(PD), Kunde, Lee,
   Leitch, Liu, McGaughey, Miranov(PD), Purwar(PD), van Hecke
Forward Silicon Vertex Upgrade*
    add Kapustinsky, Sondheim, Boissevain
CMS Heavy Ion*
   Constantin(PD), Kunde, Miranov(PD)
Theory
   Ivan Vitev(Oppenheimer PD)*




* with LDRD support
LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
Nuclear
Physics                  Major Collaborators



              Muon Spectrometers in PHENIX
           LANL, ORNL, Ecole Polytechnique ,Saclay,
              Riken, Kyoto, Korean Universities,
             University of Colorado, UNM, NMSU

      Forward Si Vertex (FVTX) PHENIX upgrade
             LANL, BNL, Charles University(Prague),
                Columbia, FNAL, HYTEC, Inc.
                     Iowa State University,
                 New Mexico State University
                   University of New Mexico
  LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
  Nuclear
  Physics                   PHENIX Activities

Physics working groups: all, Brooks (heavy-quark physics convener & speakers bureau)
Paper writing: Brooks, Constantin, Kunde, Leitch, Liu, McGaughey, Purwar
Internal paper review committee: Lee, Leitch, McGaughey, van Hecke
Muon Tracking operations & repairs: Leitch, Butsyk, Lee, Liu, Sondheim, Purwar…
Period coordinator: Leitch (run03,04,05,06)

FVTX Upgrade proposal: Brooks, Kunde, Lee, Leitch, Liu, McGaughey, van Hecke
Integration & Engineering: Sondheim, Boissevain
Detector Council Members: van Hecke(past MVD), Brooks(past muon),
          Leitch(past muon),McGaughey (past muon)
Subsystem manager: Lee (muon mechanical)
Executive Council: Leitch (past)
PHENIX Physics Impact Panel for QM05 – Leitch
Convenor of RHIC II pA/Forward physics group – Leitch
NSAC Heavy Ion Review: Barnes
  LANL        LANL Heavy Ion, Cold Nuclear Matter & Spin Program
  Nuclear
  Physics                     PHENIX Activities
Organized Annual Muon Workshop in Santa Fe in June, 3 days including invited theory talks
           2003, 2004, 2005 ~50+ attendees
Organized Muon Software Workshop in BNL February 2005
Organized FVTX workshop at LANL on triggering
PANIC organizing Committees and operations + LHC Panic satellite workshop
APS Hadron Physics Topical Group Executive Committee - Leitch


Host for students, postdocs, staff from elsewhere for physics analysis:
  NMSU - Xiaorong Wang, Han Liu, Hisham Al-Bathaineh (in residence with LANL group)
  Korea U. & Yonsei - Minjung Kweon, Woojin Park, DongJo Kim, MinKung Lee, BeomSu Chang
  Saclay - Hugo Pereria; UNM - Imran Younis; UCR - Vasili Dzhordzhadze
  UIC - Miroslav Mihaylov; NMSU -Alberto Canabal-Rey
Many former postdocs or staff now contributing elsewhere – John Sullivan, Jane Burward-Hoy,
Ben Norman (LANL); David Silvermyr (ORNL); Rusty Towell (ACU); Paul Reimer (ANL); Shekhar
Mishra (FNAL) to name a few.
  LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
  Nuclear
  Physics                Applications & Spinoffs

Muon Radiography Front End Preamplifier:
Using analog electronics expertise developed for the PHENIX muon spectrometer, we
designed a preamplifier circuit for the Muon Radiography program at LANL. This low
noise, differential output amplifier solved a crosstalk problem in their front-end
circuitry, as well as providing reduced detection threshold in their drift tubes. 128
channels have been installed and are performing well. Hundreds more channels are
either under construction or planned for the near future.


Low Cost Radiation Monitor for Remote Borders:
Based upon our experience with scintillation detectors and low noise electronics, we
wrote a proposal to DNDO/DHS for the development of a low cost gamma-ray and
neutron detection system which could instrument long sections of the US border. The
detector would consist of long tubes of liquid scintillator, whose light would be
detected using vacuum photo-diodes and processed with low-noise current
integrators. $600K of first year funding was requested, with a decision expected in
early spring of 2006.
   LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
   Nuclear
   Physics           Spin Physics at RHIC with Muons




1st measurement of single-
spin asymmetry for J/ in
polarized p+p (M. Liu)

Only LANL is working on
spin measurements with
muons
    LANL         LANL Heavy Ion, Cold Nuclear Matter & Spin Program
    Nuclear           Cold Nuclear Matter (CNM) Suppression of J/
    Physics
                             (1st RHIC dAu J/ PRL - Leitch)

           200 GeV d+Au  J/


                                                       1 mb



        0 mb          Low x2 ~ 0.003                   3 mb
                      (shadowing region)




                                               R. Vogt CNM calcs.
          5 mb




CNM calculations with weak shadowing
and absorption – need more precise dAu         AA suppression is somewhat stronger than
data.                                          CNM calculations predict

                         Also developing case for RHIC-II dA physics
     LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
     Nuclear
     Physics         Regeneration or Screening – That is the Question?




                              total




1st comprehensive AA J/ results from RHIC!
(Brooks and many others)
• regeneration compensates for QGP screening
                                                          1st Upsilons at RHIC from ~3pb-1
• OR sequential screening – the J/ never dissolved (as
                                                          2005 p+p (Leitch, Butsyk)
recent recent lattice-QCD calculations suggest)
     LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
     Nuclear           Interaction of Hadronic Dijets with the QGP
     Physics
                         Splitting of away-side jets (Constantin)
  Dijet event in a hot QCD medium

                                                                    d-Au
                                                                    p-p

                               pTrigger = 2-3 GeV           PHENIX Preliminary
                              pAssociated = 1-2 GeV




                                                          AuAu 0-10% centrality
Trigger on one leading hadron, and look for              AuAu 30-40% centrality
associated particles, “near” and “away”                   AuAu 60-92% centrality
 Is jet production modified in medium?
Yes -- Away-side shape modification:                               D     D
 broadening - pp, dAu, peripheral AuAu
 splitting - central and mid-central AuAu (and
not more broadening)

                                                           Δφ [rad]
          LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
          Nuclear          LANL in CMS at the Large Hadron Collider (LHC)
          Physics
                              (Kunde, Constantin, Mironov, Mihaylov)

     In-medium fragmentation functions Dqh(z,Q2)
     via Virtual-photon/Z0 tagged jet
                                                                                                   CMS
                                                                                                   Simulation
                                                LANL-LDRD-ER FY06-
                        h                               08
                                                               G.J.Kunde
              g*, Z0                                          P.Constantin
                                                               M.Mihaylov
                                                               C.Mironov

                       g                          l+
                               s      g*              pair
                                                 L-
                                q* 
                                            q
m+                                              jet
     m-                    q

• Could give 1st direct measurement of energy-loss
• Virtual g  μμ avoids π0 backgrounds

Other LHC interests: Quarkonia and pA collisions in the
small-x gluon saturation region
                                                                             Large CMS Acceptance is Crucial
LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
Nuclear
Physics                The PHENIX Muon Spectrometers

        Continuing operations and repairs of muon tracking systems
                   lead along with Ecole Polytechnique




   Au
                                                                     Au
    LANL       LANL Heavy Ion, Cold Nuclear Matter & Spin Program
    Nuclear           Forward Silicon Vertex (FVTX) Upgrade Proposal
    Physics
                         (will be sent to DOE before March retreat)

Enable a complete onia + open-heavy flavor physics picture
• open-charm constraints on J/ regeneration
• consistent gluon saturation picture from onia and charm/beauty
• gluon polarization via charm & beauty over broad x range


Identification of forward/backward detached vertices:
• B  J/ X & B,D  μ at large pT
• rejection of π & K decays to clean single & pair spectra
• improved J/, ’ mass resolution/separation


Detector/project synopsis (Manager M. Brooks):
• <200μm zvtx resolution; <1.5% central AuAu occupancy
• 4 mini-strip silicon umbrellas in front of each muon arm
• fast trigger to enrich & enable timely physics
• $4.5M cost with completion target end FY10


    Proposal: https://www.phenix.bnl.gov/phenix/WWW/publish/leitch/fvtx/fvtx_xx.doc
    LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
    Nuclear
    Physics                  Research Goals, FY06 and beyond

• Continue to examine the suppression/enhancement of J/ production
in A+A collisions in the light of cold nuclear matter effects from d+Au
and various theoretical pictures.
• Prepare & push for new Au+Au and d+Au runs to obtain more precise
data to allow disentangling the physics of J/ suppression in both d+A
and A+A .
• Extract open charm production in Au+Au collisions via single muons to
help disentangle J/ suppression due to the QGP and small-x physics
from nuclear medium effects.
• Study spin physics measurements (gluon polarization via J/ and open
charm asymmetry measurements) in polarized p-p collisions & look for
1st W’s in run6 500 GeV pp run.
• Submit proposal for forward silicon vertex detector upgrade and
continue R+D towards a 1st prototype and the full detector.
• Continue the process of establishing a role in the LHC heavy ion
program with study of gamma-jet correlations & p+A onia physics.
 LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
 Nuclear
 Physics          Summary of Strategy for Staffing and Effort


Spin physics from muons at RHIC is now coming and LANL is largely
alone in leading this effort
    • need to add a new young energetic physicist to help Liu and
    LANL push this physics


LANL leading major new effort for FVTX upgrade to PHENIX
   • we cannot shut down our physics efforts while we do this like
   largely happened during the muon tracker construction!
   • need to maintain strong physics while building FVTX


Lee probably retiring or phasing out over next few years
    • need replacement with superb detector and management skills
    in order to assure success in the FVTX project
  LANL         LANL Heavy Ion, Cold Nuclear Matter & Spin Program
  Nuclear
  Physics                Resource Distribution & Comments – FY08

   Year             FY06           FY07                               FY08
                                 presidents      -5%           flat          +3.5%     proposed
KB02+KB01       $2132+896k      $2320+1100k   2204+1045     2320+1100    2401+1139     2552+1210

  Budget          $3028k          $3420k       $3249k        $3420k          $3540k     $3762k
   FTE           5.8+3.2PD       6.8+3.2PD    5.8+3.2PD     6.8+3.2PD    7.1+3.2PD    7.5+3.2PD
   J/,         subcritical
                                   good       subcritical   marginal         good
p+p,d+A,A+A        AuAu
  single-μ
                  too thin         good       subcritical   marginal         good
 c,b quarks
   gluon          good for                                                               fully
                                   good       subcritical   marginal         good
polarization     beginning                                                             engaged
     jet
                 small effort
correlations
                 Major new
   FVTX
                   effort
 CMS/LHC           LDRD                                                                add pA?
                                               no new         M&S        maintain     robust FVTX
                                                staff         tight      physics      + more LHC
                                                                         & FVTX
   LANL         LANL Heavy Ion, Cold Nuclear Matter & Spin Program
   Nuclear                Resource Distribution & approximate
   Physics
                              KB01, KB02 FTE Breakdown


      Activity                         FY06                             FY07

                           KB01               KB02          KB01               KB02

J/,  - p+p,d+A,A+A    0.8 + 0.5 PD     0.5 + 0.5 PD    1 + 0.5 PD        0.7 + 0.5 PD

single-μ - c,b quarks                    0.8 + 0.5 PD                       1 + 0.5 PD

 gluon polarization     0.9 + 0.5 PD                     1.3 + 0.5 PD

  jet correlations                       0.25 + 0.5 PD                    0.25 + 0.5 PD

       FVTX                 0.2         2.35 + 0.75 PD       0.2          2.35 + 0.75 PD

     CMS/LHC                           LDRD                           LDRD

   KB01 or KB02         1.9 + 1 PD       3.9 + 2.2 PD    2.5 + 1 PD       4.3 + 2.2 PD
        total                     5.8 + 3.2 PD                     6.8 + 3.2 PD

                            With LDRD for FVTX also
 LANL      LANL Heavy Ion, Cold Nuclear Matter & Spin Program
 Nuclear
 Physics          Summary of Strategy for Staffing and Effort


Spin physics from muons at RHIC is now coming and LANL is largely
alone in leading this effort
    • need to add a new young energetic physicist to help Liu and
    LANL push this physics


LANL leading major new effort for FVTX upgrade to PHENIX
   • we cannot shut down our physics efforts while we do this like
   largely happened during the muon tracker construction!
   • need to maintain strong physics while building FVTX


Lee probably retiring or phasing out over next few years
    • need replacement with superb detector and management skills
    in order to assure success in the FVTX project
LANL
Nuclear
Physics




          BACKUP SLIDES
  LANL
  Nuclear         Out-year Plan for “proposed” (+10%/yr) Scenario
  Physics

      FY           FY08         FY09        FY10        FY11        FY12
 KB01+KB02       1210+2552 1295+2731 1385+2922 1482+3126 1586+3345
    +FTE           +1.75        +2.25       +2.75       +3.5        +4.25
   evolution     Robust HI,   Ramp up
                 CNM, Spin    Spin, LHC
                  + FVTX,        Add
                 some LHC     J-PARC?

• loss of present LDRD projects (DR & ER) after FY08
      • unlikely to get new DR but ER(s) possible, e.g. for J-PARC or
      E906/FNAL
• construction funding for FVTX HOPEFULLY will start flowing in FY08
• in out years proposed funding levels, besides giving robust heavy-ion, cold
nuclear matter, and spin program at RHIC; could allow:
      • substantial program at LHC (heavy ions and pA)
      • J-PARC or E906 program started through LDRD-ER
LANL                           Los Alamos RHIC Program
Nuclear
Physics                               LDRD-DR Proposal



  Heavy Quarks as a Probe of a New State of Matter
                                 Principal Investigators:
                            Patrick McGaughey, Emil Mottola
                                 Additional Investigators:
          Melynda Brooks, Rajan Gupta, Gerd Kunde, David Lee, Ivan Vitev,

                                           Abstract
  Intriguing evidence that a new state of matter, the quark-gluon plasma (QGP), is formed in
  collisions of ultra-relativistic heavy ions has been presented during the past year by
  physicists working at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National
  Laboratory. We propose to develop a unique capability at RHIC for the direct identification
  of heavy quarks which will be used to accurately determine the properties of this new state
  of matter produced in central collisions,. We will construct a Silicon micro-vertex detector
  (SVD) covering the forward collision region, which will provide the world’s best
  determination of heavy quarks in the high multiplicity environment of nuclear collisions. We
  will develop novel theoretical and computational tools to model and interpret the data, with
  the goal of establishing the nature of the strongly interacting non-equilibrium plasma.
  LANL    LANL LDRD-ER, “A New Probe for the Quark Gluon Plasma”
  Nuclear
  Physics     Kunde, Constantin, (Norman), Mihaylov, Mironov


There are strong indications that a new state of matter is produced in heavy ion collisions at
relativistic energies. It is called the Quark Gluon Plasma and appears to have the properties of a
nearly ideal liquid. Current plasma probes include jets, which are well understood from
elementary collisions. Analysis of jets inserted into the medium created by heavy ion collisions
contributes to the claim of producing the Quark Gluon Plasma. However, these jet studies have
thus far been limited to studying only the leading charged hadrons, which strongly couple to the
medium. This approach entails several complications, e.g. not even the initial energy of the jet is
known, but rather it has to be inferred from models. The qualitative new approach proposed in
this ER is the study of jets tagged by lepton pairs. The lepton pair does not strongly interact and
escapes the collision undisturbed while the opposite side jet passes through the quark gluon
matter that is produced. The recoiling lepton pair will carry information about the kinematical
features of the jet, and will thus be the first ever direct measurement that isolates in-medium
effects such as jet energy loss and fragmentation function modification. We propose joining the
CMS (Compact Muon Solenoid) experiment at the LHC (Large Hadron Collider) at CERN - the
only place that this physics can be done. The result of this ER will be a complete study of the
proposed jet-tagging via simulations and the analysis of the first real LHC nucleus-nucleus data
in 2008. The physics result obtained will be the first direct measurement of the plasma opacity.
 LANL
 Nuclear https://www.phenix.bnl.gov/phenix/WWW/publish/leitch/fvtx/fvtx_9feb06.doc
 Physics

     Proposal for a Forward Silicon Vertex Tracker (FVTX) for the PHENIX Experiment
                                         K.A. Drees, R. Pak
                         Brookhaven National Laboratory, Upton NY USA
                                         M. Finger, M. Finger
                            Charles University, Prague, Czech Republic
                                               J. Klaus
                       Czech Technical University, Prague, Czech Republic
                      P. Mikes, J. Popule, L. Tomasek, M. Tomasek, V. Vrba
              Institute of Physics, Academy of Sciences, Prague, Czech Republic
                               B. Cole, E. Mannel, D. Winter, W. Zajc
                                 Columbia University, NewYork, NY
                J.C. Hill, J.G. Lajoie, C.A. Ogilvie, A. Lebedev, H. Pei, G.Skank,
                                  A. Semenov, G. Sleege, F. Wei
                            Iowa State University, Ames, IA 56011, USA
                                  N. Saito, M. Togawa, M. Wagner
                                 Kyoto University, Kyoto 606, Japan
J.G. Boissevain, M.L. Brooks, S. Butsyk, H.W. van Hecke, J. Kapustinsky, G.J. Kunde, D.M. Lee,
              M.J. Leitch, M.X. Liu, P.L. McGaughey, A.K. Purwar, W.E. Sondheim
                 Los Alamos National Laboratory, Los Alamos, NM 87545, USA
                     Hisham Albataineh, G. Kyle, H. Liu, S. Pate, X.R. Wang
                       New Mexico State University, Las Cruces, NM, USA
                 B. Bassalleck, D.E. Fields, M. Hoeferkamp, M. Malik, J. Turner
                        University of New Mexico, Albuquerque, NM, USA
             Also Interested – ANL, Ecole Poly, FSU, Korea U., Saclay, Yonsei
 LANL
 Nuclear             FVTX Cost & Schedule Summary
 Physics


• Cost
   – R&D - $360k LANL + $495k BNL
   – Construction - $3.56M + 27% contingency  $4.52M
   – LANL/LDRD prototype - $1.25M/yr for 3 yrs (including theory and
     includes $360k above R&D)

• Schedule
   – Installed & commissioning by end FY10
   – Construction start October 2007 (FY08)
   – R&D start January 2006

• Proposal schedule
   – PHENIX review Dec. 2005
   – BNL review ~ Jan 2005 March 2006
   – Submit to DOE for FY08 budget planning ~March 2006
     LANL
     Nuclear                 FVTX Funding Profile
     Physics


     2500




     2000




     1500


                                                           Construction
$k




                                                           R&D


     1000




      500




        0
               FY06   FY07        FY08       FY09   FY10
                               Fiscal Year
  LANL
  Nuclear                  Heavy Ion Collisions - LHC Planning
  Physics


• Baseline: Lead-Lead collisions
   – “Early Pb Scheme” – much easier to achieve – for 2008 (and
     2009?)
        • Allows study of performance limitations.
   – “Nominal Pb Scheme” by 2009 (or 2010?)
        • Pb-Pb is perceived as posing the most difficult
          accelerator physics problems


• Future “upgrades” not in Baseline:
   – p-Pb collisions under study
        • Effects of revolution frequency difference at injection expected to be
          much weaker than at RHIC
   – lighter ion-ion collisions (e.g. Ca, Ar, O, …) appear possible
     without major upgrades, to be studied.
    from talk at PANIC05 Heavy-Ion LHC satellite meeting presented by Bolek Wyslouch
LANL      Nucleon Sea Asymmetry & Parton Energy Loss at JPARC?
Nuclear
Physics            (descendent of E866/NuSea at FNAL)




                DRAFT LOI
  LANL
  Nuclear                  Heavy Quarks with Single Muons
  Physics




1st measurement nuclear dependence in
d+A of forward prompt (charm & beauty)
muons at RHIC. Suppression at large
rapidity (small-x shadowing region) and
enhancement at negative rapidity. (M.
Liu, X-R Wang)
LANL                 Flow with the MVD & anticipation of forward
Nuclear
Physics                            silicon upgrade




Azimuthal asymmetry v2 (elliptic flow) as function of pseudo rapidity & centrality for
minimum bias A-A collisions at 200 GeV. The measurement from run4 with the MVD pad
detectors is colored in magenta; the FVTX will cover the same range in pseudo rapidity.
(The MVD is now removed, but the FVTX is, hopefully, coming.) [Norman, Kunde, van
Hecke]
    LANL          FVTX – Working in the lab with the FPIX
    Nuclear
    Physics               Readout & 2 Sensors


• World’s fastest chips (840 Mbit/sec), 0.25um CMOS,
  developed by FNAL.
• Hits are read out in real-time  direct triggering.
• Lowest power per pixel and lowest noise (90 uW, 220e-).
• Large channel count per chip (up to 2816).
• Our vertex detector is first to use this new technology.
• Prototypes being tested at LANL and FNAL.
                                                            FPIX
                                                            Readout
                                                            Chip
Prototype
Si Strip
Detector

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:5/15/2013
language:English
pages:31
yaofenjin yaofenjin http://
About