Status of the panda simulations
Download
1 / 31

Status of the PANDA Simulations - PowerPoint PPT Presentation


  • 80 Views
  • Uploaded on

Status of the PANDA Simulations. Event Generator UrQMD p A MVD Resolution Time of Flight Estimates of Data Rates “Complete” Analysis of pp  Y (3770)DD Updated “to-do” list. p. p,n. g. K. h. L S X. Multiplicity. Mass [GeV/c 2 ]. Using UrQMD for pA (A.Galoyan).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Status of the PANDA Simulations' - elton


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Status of the panda simulations
Status of the PANDA Simulations

  • Event Generator UrQMD p A

  • MVD Resolution

  • Time of Flight

  • Estimates of Data Rates

  • “Complete” Analysis of ppY(3770)DD

  • Updated “to-do” list

PANDA Collab. Meeting, May 2003


Using urqmd for pa a galoyan

p

p,n

g

K

h

L S X

Multiplicity

Mass [GeV/c2]

Using UrQMD for pA (A.Galoyan)

UrQMD ~OK but must be modified Galoyan&Polanski hep-ph/0304196

Multiplicity distribution Produced Particles

p (7 GeV/c) + Fe (10K events)

PANDA Collab. Meeting, May 2003


Phase space distribution
Phase Space Distribution

All particles Q vs P Neutron dN/dQ

Q

PANDA Collab. Meeting, May 2003


Mvd resolution a sokolov
MVD Resolution (A.Sokolov)

  • Investigate MVD resolution with pp4mm (8GeV)

  • Take small angle scattering into account with a reduced weight for hits in outer layers

  • Modify pad orientation:

    1st and 3rd – 5th layers with pads  to beam

    2nd layer || to beam direction

  • Pad intrinsic resolution 12x70 mm

  • Increase diameter of the the beam pipe

PANDA Collab. Meeting, May 2003


Vertex resolution
Vertex Resolution

  • D0 = radial distance

  • Z0 = longitudinal distance

polar angle Q

polar angle Q

polar angle Q

PANDA Collab. Meeting, May 2003


Increased beam pipe diameter
Increased Beam Pipe Diameter

PANDA Collab. Meeting, May 2003


Z0 resolution r 40 mm beam pipe
Z0 Resolution, R=40 mm Beam Pipe

sZ0 increases

from ~13 mm

to ~18 mm

PANDA Collab. Meeting, May 2003


Systematic error in z0
Systematic Error in Z0

PANDA Collab. Meeting, May 2003


Momentum resolution
Momentum Resolution

mean resolution for pp4m events at 8 GeV

PANDA Collab. Meeting, May 2003


Time of flight c schwarz
Time of Flight (C.Schwarz)

  • Kaon ID in the DIRC starts at about 600 MeV/c

  • Can Reduce # of DIRC PMTs with ToF

  • Redundancy

  • Fast trigger

  • Resolution ~ 100 ps

  • Detector type: RPC or scintillator?

PANDA Collab. Meeting, May 2003



Dirc vs tof
DIRC vs ToF

DIRC is needed for P>600 MeV/c and ToF for P<600 MeV/c


Estimated data rates p salabura jr
Estimated Data Rates (P.Salabura+JR)

  • Number of Readout Channels

  • Mean Multiplicity

  • Data per Event

  • Event rate (107 Hz interactions)

PANDA Collab. Meeting, May 2003


Number of readout channels
Number of Readout Channels

  • MVD 9.2x106 pixels

  • STT 8.7x103 wires

  • MDCT 1.7x103 wires

  • DIRC 1.0x104 PMTs

  • EMCT 7.5x103 crystals

  • RICH 4.5x104 pads

  • MuonT 3.2x104 cells

  • +ToF+FS …

PANDA Collab. Meeting, May 2003


Mean multiplicities pp 8 gev c
Mean Multiplicities (pp 8 GeV/c)

  • MVD 12 hits/evt x 2.5 pads/hit = 30

  • STT 94

  • MDCT 37

  • DIRC 7 bars/evt x 20 PMTs/hit x ½ 70

  • EMCT 82

  • RICH 1 hit/evt x 15 pads/hit 15

  • MuonT 0.26

  • +ToF+FS ???

PANDA Collab. Meeting, May 2003


Number of bits per hit rounded
Number of bits per Hit (rounded)

  • MVD Layer(4)+Coordinate(2x10)+sysID(8) = 32

  • STT Layer(4)+Wire(10)+Time(2x10)+sysID(8)= 48

  • MDCT Layer(4)+Wire(8)+Time(10)+sysID(8) = 32

  • DIRC PMT(14)+E(12)+T(12)+sysID(8) = 48

  • EMCT Crystal(13)+E(15)+sysID(8) = 48

  • RICH PadNumber(2x8)+sysID(8) = 24

  • MuonT Cell(12)+T(12)+ sysID(8) = 32

  • +ToF+FS …

PANDA Collab. Meeting, May 2003


Total data rates 10 7 hz
Total Data Rates (107 Hz)

Detector bits/hit Multiplicity Total (GBytes/sec)

  • MVD 32 30 1.2

  • STT 48 94 5.6

  • MDCT 32 37 1.5

  • DIRC 48 70 4.2

  • EMCT 48 82 5

  • RICH 24 15 0.5

  • MuonT 32 0.25 0.01

  • +ToF+FS … ?7?

    25 GB/s

PANDA Collab. Meeting, May 2003


Analysis of pp y 3770 dd jr
Analysis of ppY(3770)DD (JR)

  • Single D±Kp±p± Selector (BR=9.1%)

  • ppY(3770)DD

  • Background Estimates

    report at GSI Docuserver:

    http://www-new.gsi.de/onTEAM/tree/temp/1053448016/191053014637.ps

PANDA Collab. Meeting, May 2003


Vertex resolution 1 d per event
Vertex Resolution (1 D per event)

Force the decay at V=(0.1,0.1,0.4) mm PD=3.3GeV/c

Combine + - - or -++ tracks (i.e. no PID) for reconstruction

M=1865 sM=7.3 MeV/c2e ~ 0.71

sZ=22 mm

VR [mm]

VZ [mm]

PANDA Collab. Meeting, May 2003


Y 3770 dd k k 2 p 2 p
Y(3770)DD K+K-2p++2p-

10,000 Events

M+-- [GeV]

PANDA Collab. Meeting, May 2003


Decay vertex location
Decay Vertex Location

Transverse

Longitudinal

D [mm]

Z [mm]

Only longitudinal coordinate sensitive to D-mesons !

PANDA Collab. Meeting, May 2003


Proper lifetime determination
Proper Lifetime Determination

N(x) ~ exp{ - |V| M / (P ct) }

ct = 292 ± 3 mm

input 317 mm

|V|M/P

PANDA Collab. Meeting, May 2003


Dd kinematical variables
DD Kinematical Variables

Missing Mass Squared Invariant Mass

(Mmiss)2 [GeV2]

Minv [GeV]

N.B. (Mp)2 ~ 0.02 GeV2 e ~ 31% (no PID)

PANDA Collab. Meeting, May 2003


Fake d candidates from background
Fake D-Candidates from Background

80,000 Events

Vertex Z - Location

+ - - Inv. Mass

Vz [mm]

Minv [GeV/c2]

PANDA Collab. Meeting, May 2003


Background suppression factors
Background Suppression Factors

80,000 input background events 6.6 GeV/c

3,144 D-Candidates (no PID!)

196 events with Vz > 0.1 mm

100 events with c2/dof < 10 (vertex fit)

0 events with a D+ & D- candidate

estimate of remaining cuts by widening cuts above

1/16000 for the second D candidate

1/50 |(Mmiss)2| < 0.002 GeV2

1/10 Minv ~ s

PANDA Collab. Meeting, May 2003


Peak to background ratio
Peak to Background Ratio

Assume a Y(3770) formation cross section of 160 nb

L=1032  140 Counts/hour

(still without PID!!!)

PANDA Collab. Meeting, May 2003


Summary
Summary

  • Event Generator UrQMD p A

  • MVD Resolution

  • Time of Flight

  • Estimates of Data Rates

  • “Complete” Analysis of ppY(3770)DD

PANDA Collab. Meeting, May 2003


Outlook feb 2003 meeting

Status

May 2003

Outlook (Feb 2003 Meeting)

  • pbar-A background generator

  • Generation of 107 pbar-p background events

  • Introduction of the absolute time, (in progress) to allow studies of pileup

  • Add more dead areas/materials

  • Detailed studies of thresholds, etc.

  • Layer of ToF between DIRC and EMC

  • CsI at backward angles?

  • Can e+e- be selected/triggered (conversion in MVD…)

  • Improvement of the FastSim

  • Evaluation of signal/background ratio

  • Input for Trigger/DAQ

  • Hypernucleus experiments…


Outlook 2

group meeting Wed. 11-13

Outlook 2

  • Target (start detector?)

  • Tof

  • FS

  • 3D Fieldmap

  • Tracking (Kalman)

  • Kinematic fitters

  • Trigger simulations

  • Physics Analysis for specific channels(e.g. Glueballs, DD, leptons,ff, gg, gg*)

PANDA Collab. Meeting, May 2003


ad