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Welcome to my WiKi Homepage!
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That's me Institute GSI Darmstadt, KP 1
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That's me Institute GSI Darmstadt
 
Adress Planckstrasse 1, 64291 Darmstadt, Germany
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Office SB 2, 4.111; if not there, look in the Cafeteria smile
Phone +49 - 6159 / 712586
Fax +49 - 6159 / 712989
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Office KBW 4.004
Phone +49 - 6159 / 711619
Fax +49 - 6159 / 713026
 
Email v.friese@gsi.de
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CBM Physics Report 216

 

cbm_report_2016.pdf: CBM Physics Report to the FAIR Scientific Council

Publications

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Fax +49 - 6159 / 712989
Email v.friese@gsi.de
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cbm_report_2016.pdf: CBM Physics Report to the FAIR Scientific Council

 

Publications

Frascati 2007

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  Novemberstimmung or bonjour tristesse

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META FILEATTACHMENT attachment="cbm_report_2016.pdf" attr="" comment="CBM Physics Report to the FAIR Scientific Council" date="1466584775" name="cbm_report_2016.pdf" path="cbm_report_2016.pdf" size="2327621" user="VolkerFriese" version="1"
 
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Welcome to my WiKi Homepage!
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That's me Institute GSI Darmstadt, KP 1
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That's me Institute GSI Darmstadt, KP 1
 
Adress Planckstrasse 1, 64291 Darmstadt, Germany
Office SB 2, 4.111; if not there, look in the Cafeteria smile
Phone +49 - 6159 / 712586
Fax +49 - 6159 / 712989
Email v.friese@gsi.de
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Publications

 

Frascati 2007

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GSI Scientific Report 2006 reloaded... click here
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Flavour Fluctuations

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China 2006

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  Quark Matter and more...

Photos

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21 Jun 2013 - Main.VolkerFriese
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Homepage of Volker Friese

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Email v.friese@gsi.de
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Frascati 2007

 

CBM Progress Report 2006

GSI Scientific Report 2006 reloaded... click here
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Email v.friese@gsi.de
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CBM Progress Report 2006

 
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GSI Scientific Report 2006 reloaded... click here
 
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Flavour Fluctuations

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Access restricted
 
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China 2006

Quark Matter and more...
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China 2006

Quark Matter and more...
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Flavour Fluctuations

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China 2006

Quark Matter and more...

Photos

Some photos of the group (takes time to download)

Limericks

Novemberstimmung or bonjour tristesse
 
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China 2006

Quark Matter and more...
 

Flavour Fluctuations

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That's me Homepage of Volker Friese

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Homepage of Volker Friese

 

-- VolkerFriese - 26 Sep 2006

Welcome to my WiKi Homepage!
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Institute GSI Darmstadt, KP 1
Adress Planckstrasse 1, 64291 Darmstadt, Germany
Office SB 2, 4.111; if not there, look in the Cafeteria
Phone +49 - 6159 / 712586
Fax +49 - 6159 / 712989
Email v.friese@gsi.de
>
>
That's me Institute GSI Darmstadt, KP 1
Adress Planckstrasse 1, 64291 Darmstadt, Germany
Office SB 2, 4.111; if not there, look in the Cafeteria smile
Phone +49 - 6159 / 712586
Fax +49 - 6159 / 712989
Email v.friese@gsi.de
 

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05 Oct 2006 - Main.VolkerFriese
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That's me Homepage of Volker Friese

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Flavour Fluctuations

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Presentations

D. Kresan: Simulations of the Event-by-Event Fluctuations of Particle Yield Ratios
International Workshop on Correlations and Fluctuations in Relativistic Heavy Ion Collisions
Florence, July 7-9, 2006
Presentation (ppt)

Proposal for flow of arguments

  • Introduction
    • Fluctuations as signature for critical phenomena
    • FAIR/SPS energy regime promising
    • Measurement of K/pi and p/pi fluctuations by NA49
    • Need to check hadronic origin of fluctuations before stating new physics
  • UrQMD results (sum kaons/sum pions, sum protons/sum pions)
    • Results in 4pi and midrapidity. Not much difference; energy dependence small.
    • Positive for kaons, negative for protons. Probable source: resonance decays.
    • Check: Results for K+/pi+, K-/pi+ and so on. All negative. Proofs resonance influence (Kstar).
    • Results with Kstar set stable. Correlations diminuish.
  • Influence of acceptance
    • UrQmd results with acceptance cuts (rapidity, momentum, azimuth). Discuss influence on fluctuations.
    • Compare with NA49 after proper cuts.
  • sum kaons/sum pions is positive -> antocorrelation. Explanation: phi decay.
    • Toy model including strong decay channels
    • Toy model including also weak decay of phi->K0sK0l ->pi+pi-K0l.
    • Discuss probability for pions from V0 to be accepted as primary in the experiment. Possible energy dependence (boost of K0s)
  • Predictions for CBM (10 - 35 AGeV) with realistic detector acceptance
  • Conclusions
    • ???

Required data / plots

  • UrQMD (K+=K-)/(pi+=pi-) and (p+ap/pi+=pi-), 4pi and midrapidity (delta y small) -> Stephane
  • same with proper cuts for NA49 acceptance -> Stephane
  • UrQMD K+/pi+, K-/pi+, K+/pi-, K-/pi-, 4 pi and midrapidity -> Stephane
  • UrQMD without phi, Kstar and both -> Dima

Information requested

  • Kinematic cuts applied in the NA49 data analysis (C. Roland)

First paper draft, September 2, 2006

 
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META FILEATTACHMENT attr="" comment="Presentation (ppt)" date="1160060805" name="Kresan.ppt" path="Kresan.ppt" size="1443328" user="VolkerFriese" version="1.1"
 
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05 Oct 2006 - Main.VolkerFriese
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Homepage of Volker Friese

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That's me Homepage of Volker Friese

 
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-- VolkerFriese - 26 Sep 2006

Welcome to my WiKi Homepage.
 
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-- VolkerFriese - 26 Sep 2006
 
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That's me
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Welcome to my WiKi Homepage!
 

Institute GSI Darmstadt, KP 1
Adress Planckstrasse 1, 64291 Darmstadt, Germany
Line: 21 to 21
 

Flavour Fluctuations

Access restricted
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>
>

Presentations

D. Kresan: Simulations of the Event-by-Event Fluctuations of Particle Yield Ratios
International Workshop on Correlations and Fluctuations in Relativistic Heavy Ion Collisions
Florence, July 7-9, 2006
Presentation (ppt)

Proposal for flow of arguments

  • Introduction
    • Fluctuations as signature for critical phenomena
    • FAIR/SPS energy regime promising
    • Measurement of K/pi and p/pi fluctuations by NA49
    • Need to check hadronic origin of fluctuations before stating new physics
  • UrQMD results (sum kaons/sum pions, sum protons/sum pions)
    • Results in 4pi and midrapidity. Not much difference; energy dependence small.
    • Positive for kaons, negative for protons. Probable source: resonance decays.
    • Check: Results for K+/pi+, K-/pi+ and so on. All negative. Proofs resonance influence (Kstar).
    • Results with Kstar set stable. Correlations diminuish.
  • Influence of acceptance
    • UrQmd results with acceptance cuts (rapidity, momentum, azimuth). Discuss influence on fluctuations.
    • Compare with NA49 after proper cuts.
  • sum kaons/sum pions is positive -> antocorrelation. Explanation: phi decay.
    • Toy model including strong decay channels
    • Toy model including also weak decay of phi->K0sK0l ->pi+pi-K0l.
    • Discuss probability for pions from V0 to be accepted as primary in the experiment. Possible energy dependence (boost of K0s)
  • Predictions for CBM (10 - 35 AGeV) with realistic detector acceptance
  • Conclusions
    • ???

Required data / plots

  • UrQMD (K+=K-)/(pi+=pi-) and (p+ap/pi+=pi-), 4pi and midrapidity (delta y small) -> Stephane
  • same with proper cuts for NA49 acceptance -> Stephane
  • UrQMD K+/pi+, K-/pi+, K+/pi-, K-/pi-, 4 pi and midrapidity -> Stephane
  • UrQMD without phi, Kstar and both -> Dima

Information requested

  • Kinematic cuts applied in the NA49 data analysis (C. Roland)

First paper draft, September 2, 2006

 
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05 Oct 2006 - Main.VolkerFriese
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Dielectron Working Group

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Homepage of Volker Friese

 
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Meeting 21. September 2006, EuropCafe Strasbourg

Participants: Das, Friese, Galatyuk, Höhne, Stroth

A first application of the reconstruction chain (STS+RICH) including electron ID has been presented by Tetyana at the collaboration meeting. The analysis (cut strategy) was not yet optimised.

To arrive at a realistic simulation and background rejection, the following items will have to be worked on:

  • Tracking
    • Improve tracking for low-momentum, short tracks (track segments). This most probably requires a second, dedicated tracking algorithm, maybe running after the main track finder in the chain. The various tracking groups (Heidelberg, LIT, LHE) have to be contacted whether they can work on this task.
    • Look for signatures of closeby tracks of RICH-identified electrons. Such signatures are e.g. a nearby hit in the first or second VTS station. Again, tracking experts should be contacted.
    • Tracking in an odd field. The field required for the LM dielectron analysis is probably different from that used in the standard setup (minimal field between target and first VTS station, minimal field in RICH, still keep the field integral of about 1 Tm). Tracking in such a field may be more difficult and require dedicated efforts.
    • Also needed is the extrapolation of tracks through the RICH mirror, which thus should be appropriately implemented in the Kalman filter.
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  • RICH
    • Study the influence of noise hits in the PMs on ring finding in the inner part
    • Can secondary electrons, with odd incident angles, can be discriminated by their ring shape or quality?
    • Improve the ring-track matching by
      • not only selecting the track closest to the ring centre, but all within a certain range (2 sigma or so),
      • introduce momentum dependent matching cuts.
    • Check for matching of pions with the rings of their delta electrons
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Welcome to my WiKi Homepage.
 
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  • TRD
    • Include the TRD PID (as already applied by Alla) for RICH-identified electrons to discriminate misidentied pions
 
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  • TOF
    • Use TOF information for RICH-identified electrons to suppress misidentified pions.
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That's me
 
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Institute GSI Darmstadt, KP 1
Adress Planckstrasse 1, 64291 Darmstadt, Germany
Office SB 2, 4.111; if not there, look in the Cafeteria
Phone +49 - 6159 / 712586
Fax +49 - 6159 / 712989
Email v.friese@gsi.de
 
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Clearly, some of these items require interaction with other working groups. A meeting with the Heidelberg tracking group is envisaged for November.
 
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-- VolkerFriese - 26 Sep 2006
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Flavour Fluctuations

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Revision 2
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Dielectron Working Group

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-- VolkerFriese - 26 Sep 2006
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