Joachim Stroth Johann Wolfgang Goethe-Universitaet (IKF)

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Perspectives for hadron and nuclear matter physics with Perspectives for hadron and nuclear matter physics with PANDA and CBMPANDA and CBM

Joachim Stroth

Johann Wolfgang Goethe-Universitaet (IKF)

March 6, 2008 Joachim Stroth 2

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r Hadron and Nuclear Matter Physics at FAIR

FAIR will provide intense beams of

stored and cooled antiprotons,

slowly extracted heavy ions,

and, due to the storage and stretcher ring concept, a

a high degree of parallel running!

Two general purpose experiments will operate at interaction rates of up to 10 MHz.

New detector concept:

Self triggered detectors/read-out systems with time stamping.

Highly-parallel read-out and real-time feature extraction for higher level event selection.

CBM – Nuclear Matter Physics

PANDA – Hadron Physics


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0 2 4 6 8 12 1510p Momentum [GeV/c]

Mass [GeV/c2]1 2 3 4 5 6

ΛΛΣΣΞΞ

ΛcΛc

ΣcΣc

ΞcΞc

ΩcΩcΩΩ DDDsDs

qqqq ccqq

nng,ssg ccg

ggg,gg

light qqπ,ρ,ω,f2,K,K*

ccJ/ψ, ηc, χcJ

nng,ssg ccg

ggg

Meson spectroscopy light mesons

charmonium

exotic states

glueballs

hybrids

molecules/multiquarks

open charm

Baryon/antibaryon production

Charm in nuclei

Double Hypernuclei

Time-like electromagneticform factors of the proton

Generalized Parton Distributions

The Physics Program of PANDA


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r The Physics Program of CBM

Deconfinement phase transition at high B

excitation function and flow

of strangeness (K, , , , )

excitation function and flow

of charm (J/ψ, ψ', D0, D, c)

melting of J/ψ and ψ'

QCD critical endpoint

excitation function of

event-by-event fluctuations (K/π,...)

The equation-of-state at high B

collective flow of hadrons

particle production at threshold energies (open charm?)

Onset of chiral symmetry restoration at high B

in-medium modifications of hadrons (,, e+e-(μ+μ-), D)


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r HIC for FAIR and Theory

Development of an improved microscopic transport codeDevelopment of an improved microscopic transport code

Emphasis on Coverage of all stages:

initial phase dense phase hadronization

Treatment of rare processes: virtual photon emission heavy quark propagation

Strategy Hybrid Approach Inclusion of QGP phase


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r HIC for FAIR and Theory

Foster Lattice QCD at the Hessian UniversitiesFoster Lattice QCD at the Hessian Universities

Emphasis on: Hadron properties at realistic quark masses

chiral extrapolations

heavy-light systems, QCD exotica

QCD thermodynamics at finite B

location and order of phase transition

existence/location of critical point


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r HIC for FAIR and Experiments

HIC for FAIR will provide:HIC for FAIR will provide: Theoretical guidance for trigger strategies

Solutions for high-performance computing

Optimized algorithms for feature extraction

Simulation and design for detector R&D

Simulation and analysis frameworks for

performance studies

Examples: Sophisticated event generators

UrQMD, HSD

PLUTO

High speed tracking

Secondary decay vertex reconstruction

FAIR Root


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r High-speed Track Reconstruction

CBM will record up to one Billion tracks per second in the compact silicon tracking station. Fast track reconstruction Optimal control of

alignment

Speedup by factor 120.000 in track reconstruction optimized code port to cell processor parallel processing


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r Concepts for Fast Feature Extraction

PANDA: Dedicated hardware based on FPGAs

and ATCA backbone. Flexible interconnection with

highest bandwidth.

CBM: Commodity hardware (GPU, many core CPUs) High level programming language supporting

multi-core architecture

Challenge!Challenge! How to port sophisticated algorithms

developed in C++ to dedicated hardware.

cell processor many core CPUs graphics processing untis FPGAs (Virtex, Lattice etc.)

Intel Polaris

80 core CPU2 TFlop on a chip

GeForce 9600

64 core GPU


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r Ultra-thin Vertex Detectors

Find displaced decay vertex in an environment of hundreds of charged tracks.

Needs highest sensitivity: ultra-thin detectors position resolution in

the micron region

Many technological challenges in system integration identical in CBM,

PANDA and NUSTAR low-mass data read-out low-mass heat evacuation operation in vacuum mechanical rigidity dynamic instabilities


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r Data Volumes (Experiment)

CBM (running the charm experiment) will produce 1 TByte data per hour! CBM (running the charm experiment) will produce 1 TByte data per hour!

Reactions/s Event size

[MByte]

ThroughputDAQ [GByte/s]

Throughput to MSS[GByte/s]

ALICE10.000(250 Events/s)

80 20 1

CBM*10.000.000(continuous)

0,1 1000 1

PANDA20.000.000 (continuous)

0.008 200 0.1

*worst case: J/ measurement


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mass storage

Integrated Simulation & Analysis Package

data base

list mode data

calibration

track reconstruction

higher level analysis

correction for detector response

Experiment

DAQtheory

event generator

track propagation(GEANT)

digitizers

observables

simulation

exp./sim. DST

CAD model

PBytesPBytes

GByte/sGByte/s

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r Summary

will provide optimal support in computing relevant

issues of detector R&D. prepare software frame work for day one data

analysis.

improve theories and models for guidance and relevant interpretation of experimental results.

Documents

Joachim Stroth Johann Wolfgang Goethe-Universitaet (IKF)