Status of the simulations
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Status of the Simulations. Detector Issues (MVD  Andrei Sokolov) Implementation of a TPC ToF for PID Modified EMC Counting rates and PID in the muon detectors Cone shaped Dipole Magnet? Analysis Issues Hyperon reconstruction LoI D*. Implementation of a TPC for the TS tracking.

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Status of the Simulations

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Status of the simulations

Status of the Simulations

  • Detector Issues

    • (MVD  Andrei Sokolov)

    • Implementation of a TPC

    • ToF for PID

    • Modified EMC

    • Counting rates and PID in the muon detectors

    • Cone shaped Dipole Magnet?

  • Analysis Issues

    • Hyperon reconstruction

    • LoI

    • D*

James Ritman Univ. Giessen


Implementation of a tpc for the ts tracking

Implementation of a TPC for the TS tracking

Open questions:

30 ms drift time!

Ion feedback

beam

TUM

James Ritman Univ. Giessen


Pid with the tof barrel

PID with the ToF Barrel

Time resolution of 100 ps assumed

beam

JLU GI

James Ritman Univ. Giessen


Momentum vs velocity

JLU GI

b

Momentum [GeV/c]

Momentum vs Velocity

James Ritman Univ. Giessen


Mass 2 from p and b

JLU GI

Mass2 from P and b

P < 1.0 GeV/c

James Ritman Univ. Giessen


Modifications to the emc

Modifications to the EMC

Current design

Modified design

Larger overlap needed at small polar angles (cylindrical geometry)

longer crystals needed at forward angles (higher gamma energy)

RUB

James Ritman Univ. Giessen


Status of the simulations

RUB

Improved efficiency and

energy resolution (p07.96.9 MeV, h 19.7  17.4 MeV)

James Ritman Univ. Giessen


Improved efficiency through reduced split off probability

RUB

Improved Efficiency Through Reduced Split-off Probability

James Ritman Univ. Giessen


Status of the simulations

Counting Rate in Muon Detector

(background events)

p = 4.068 GeV/c

p = 6.6 GeV/c

JLU GI

James Ritman Univ. Giessen


Muon id for real muons

  • JLU GI

Muon ID for “real” muons

Drf

Dz

c2

Dt

James Ritman Univ. Giessen


Muon id for background

JLU GI

Muon ID for Background

James Ritman Univ. Giessen


Pid distributions

PID Distributions

background

muons

JLU GI

James Ritman Univ. Giessen


Muon detectors in the fs

Muon Detectors in the FS

  • … GSI docu server was down on the weekend…

GSI

James Ritman Univ. Giessen


Cone shaped dipole magnet

Cone Shaped Dipole Magnet??

JINR

James Ritman Univ. Giessen


Flux density

Flux Density

JINR

James Ritman Univ. Giessen


Analysis issues hyperon reconstruction

Analysis Issues:Hyperon Reconstruction

James Ritman Univ. Giessen


Status of the simulations

1

2

3

1.116

2.232 GeV/c

3.348

0.2

0.4 GeV/c

0.6

gb

pL

pTL

Single L events

JLU GI

James Ritman Univ. Giessen


Status of the simulations

Angular resolution

p/m=1

p/m=2

p/m=3

Single L events

N.B.: Suppressed zero

James Ritman Univ. Giessen


Status of the simulations

L-L

pbeam = 4 GeV/c

JLU GI

James Ritman Univ. Giessen


Results in the loi

Results in the LoI

James Ritman Univ. Giessen


Detection of rare neutral channels

Detection of Rare Neutral Channels

As an example: hcgg

Background:

p0g, p0p0

hc:p0g:p0p0

1 :50 :500

Upp / RUB

James Ritman Univ. Giessen


Detection of rare neutral channels1

Detection of Rare Neutral Channels

Comparison with E835

(PLB 566,45)

PANDA

Upp / RUB

James Ritman Univ. Giessen


Dimuon spectrum in p cu

Dimuon Spectrum in p+Cu

  • Beam momentum “on resonance”

  • Full background simulations(result scaled up)

  • Muons from J/Y have high Pt

  • J/Y has low Pt (coplanar)

J/Y

GSI

James Ritman Univ. Giessen


Open charm

Open Charm

pp DD

DKpp

„no backgroundevents added“

Mass Resolution

~ 10 MeV/c2

JLU GI

James Ritman Univ. Giessen


Open charm1

Open Charm

As an example of the Pbar P  Y(3770)  DD Analysis

Plot MDD – MD – MD + 2x1869MeV

raw S/B ~ 10-7

JLU GI

James Ritman Univ. Giessen


Status of the simulations

mm

cut

GeV

Efficiency ~ 65% (45%)

GeV

JLU GI

James Ritman Univ. Giessen


Summary

Summary

  • More detailed description of many detectors

  • Analysis methods improved

  • (code distribution tools [Pavia])

  • LoI prepared

  • D* analysis

  • Hyperons

  • More on the Benchmark Channels in Klaus Peters’ talk

James Ritman Univ. Giessen


Vertex distributions geant4

Longitudinal

Scale up by x10!

0.15 < Vz < 5 mm

signal DPM background

Vertex Distributions GEANT4

Transverse

D meson signal DPM background

James Ritman Univ. Giessen


Dd missing mass

DD Missing Mass

signal DPM background

N.B. different x scale

| Mmiss2|< 0.001 GeV2 (tight cut)

James Ritman Univ. Giessen


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