D Hadronic Group Meeting

2011-12-13

• Xin: DT plots: PDF

2011-10-25

• Xin: Update

2011-10-18

• Xin: Making progress in the draft of PRD-RC paper, will send out the first draft before next DHad meeting.

2011-10-11

• Xin: Update

2011-10-04

• Xin: Update

2011-09-27

• Xin: Update
• Peter: Current CBX draft status for DsHad

2011-09-20

• Xin: Update
• Peter: Update

2011-09-06

• Xin: Update

2011-08-30

• Xin: Update
• Peter: Stat-only Ds branching fraction results with comparison to previous analysis and PDG.

2011-08-23

• Xin: Update

2011-08-16

• Xin: Update

2011-08-09

• Xin: Update

2011-08-02

• Xin: Update

2011-07-19

• Xin: Update

2011-05-31

• Xin: Update

2011-05-24

• Xin: Update

2011-05-17

• Xin: Update

2011-05-10

• Xin: Update

2011-05-03

• Xin: Update

2011-04-26

• Xin: Update

2011-04-19

• Xin: Update

2011-04-12

• Xin: Update

2011-04-05

• Xin: Update

2011-03-29

• Xin: Update

2011-03-22

• Xin: Update

2011-03-15

• Xin: Update

2011-03-08

• Xin: Update
• Peter: Effects of CCFIX on Ds efficiencies
• Souvik: Paper draft up for vote

2011-03-01

• Xin: Update
• Souvik: Systematics from soft e+e- reconstruction CBX draft, Systematics from ratio of efficiencies.

2011-02-15

• Xin: Update
• Souvik Paper draft

2011-02-08

• Xin: Update
• Souvik: Current draft of paper, Meditations on narrowing down the Ds* quantum numbers.

2011-02-01

• Xin: Update
• Peter: shower energies for Ds->pi eta', eta' -> rho gamma

2011-01-25

• Xin: Update
• Souvik: Paper Draft
• Peter: Some DT kinematic properties for DsHad

2011-01-18

• Xin: Update
• Souvik: Paper Draft work in progress. Angular distribution study notes.

2011-01-11

• Xin: Update
• Souvik: Ph.D. Dissertation(Final), Paper Draft(Work in progress).

2011-01-04

• Xin: Update

2010-12-21

• Xin: Update

2010-12-14

• Souvik: Paper Draft... work in progress.
• Xin: Update

2010-12-07

• Xin: Update
• Souvik: CBX Note. Plenary Talk (work in progress) Talk

2010-11-30

• Souvik: Part of CBX Note dealing with systematic uncertainties arising from soft electron and photon reconstruction. "Dilepton spectra from decays of light unflavored mesons" see Section II for a calculation parallel to our theoretical estimate for the ratio of branching fractions.
• Xin: Update

2010-11-23

• Xin: Update
• Souvik: Ds gamma update for all modes

2010-11-16

• Souvik: Ds gamma
• Xin: Update

2010-11-09

• Xin: Update
• Souvik: Ds gamma

2010-11-02

• Xin: Update
• Souvik: Result with systematic for photon reconstruction efficiency.
  m_ee comparison between data and Monte Carlo.
  Ds gamma problem.

2010-10-26

• Xin: Update

2010-10-19

• Xin: Update

2010-10-12

• Xin: Update

2010-10-05

• Xin: Update

2010-09-28

• Xin: Update

2010-09-21

• Xin: Update
• Souvik: Low energy electron efficiency

2010-09-14

• Xin: Update

2010-09-07

• Xin: Update

2010-08-03

• Xin: Update
• Russell: Update
• Souvik: Unblinded Data! Updated (still in progress) Note, Spreadsheet with the result.

2010-07-27

• Xin: Update
• Souvik Updates on Ds*-> Ds gamma.

2010-07-20

• Xin: Update
• Souvik: Updates on Ds*-> Ds gamma. Note.

2010-07-13

• Xin: Update

2010-07-06

• Souvik: Updates on Ds*-> Ds gamma.
• Xin: Update

2010-06-29

• Souvik: Updates on Low Energy Electron Efficiency Study, Ds* -> Ds gamma, Brian's suggestions
• Xin: Update

2010-06-22

• Xin: Update
• Souvik: Low Energy Electron Efficiency Update

2010-06-15

• Xin: Update
• Souvik: Updates on the Low Energy Electron Efficiency and possible Vertex Fitting improvement

2010-06-08

• Xin: Update
• Souvik: Updates on the Low Energy Electron Efficiency and possible Vertex Fitting improvement

2010-06-01

• Xin: Update
• Souvik: MC Validation, Signal Significance

2010-05-25

• Souvik: Low Energy Electron Efficiency Signal Significance Study
• Xin: Update

2010-05-18

• Souvik: Low Energy Electron Efficiency
• Xin: Update

2010-05-11

• Xin: Update
• Souvik: Low Energy Electron Efficiency

2010-05-04

• Xin: Update
• Souvik: Updates to the note.

2010-04-27

• Xin: Update
• Souvik:
  • Vertex Fitting of e+e- -- does it help? Brian's paper page 64 shows a peak between 10-15 MeV that I don't exactly see.
  • Estimate of backgrounds in the various modes in the note on pages 115-150. Anders reviewing this.
  • Have a scheme for propagating e+e- tracking inefficiencies into systematic errors in the branching fraction (is in my notebook... should put into note.) Reviving e+e- tracking inefficiency study today.

2010-04-20

• Souvik: Does m_ee shift with vertex fitting?
• Xin: Update

2010-04-13

• Xin: Update
• Souvik:
  • deltaM and m_BC shapes we are fitting to
  • DeltaM and mBC fitted in the:
    • KKpi Mode
    • KsK Mode
    • pieta Mode
    • pietaprime Mode
    • KKpipi0 Mode
    • pipipi Mode
    • KsKmpipi Mode
    • pipi0eta Mode
    • pietaprimerho Mode
  • Estimate of background from data for each of the modes
  • error

2010-04-06

• Xin: Update
• Souvik: Updated Note.

2010-03-30

• Souvik: Updated Note.
• Xin: Update

2010-03-23

• Xin: Update
• Souvik: Strategy for Un-blinding.

2010-03-16

• Souvik: Update of the sideband study for the conversion region in dPhi.
• Xin: Update

2010-03-09

• Souvik: Update with sideband study for the dPhi (looking at the conversion side) and mBC. Slightly updated predictions.
• Xin: Update

2010-03-02

• Souvik: Update on optimized cuts for the electron and pion fitted samples, and validation of reprocessed data.

2010-02-02

• Xin: Update
• Souvik: Note

2010-01-26

• Xin: Update

2010-01-21

• Souvik: Electron-fit optimization work-around. Reprocessing update. Update
• Xin: Update

2010-01-14

• Xin: Update
• Souvik: Optimized selection criteria for pion-fitted and electron-fitted data in all Ds channels. Sideband studies. Note

2010-01-07

• Xin: Progress on the MC difference Link

2009-12-17

• Souvik: Update
• Xin: Progress on the MC difference and 537/pb datasets Link
• David: Ratios of 537/pb to 281/pb in data

2009-12-10

• Souvik: Update
• Xin: Progress on the MC difference and full datasets Link

2009-12-03

• Xin: Progress on the MC difference and full datasets Link
• Souvik: Update

2009-11-19

• Xin: Progress on the CLEOG constants and full datasets Link
• Souvik: Reprocessing update

2009-11-12

• Xin: Progress on the CLEOG constants and data43 events Link
• Souvik: Reprocessing and sideband study updates Eventstore and reprocessed data comparison for Dataset 47: /afs/cern.ch/user/s/sdas/Ds/DsTagCompare.txt (61M)

2009-11-05

• Xin: Progress on the CLEOG constants and data43 events Link
• Souvik: DeltaM and mBC sidebands study to make sure generic MC + continuum MC ~ data. Progress with re-processing.

2009-10-29

• Xin: Progress on the CLEOG constants and data43 events Link
• Souvik: Different fronts of work
• Peter: Non-mechanical tasks remaining for DsHad update (i.e. more than just running existing code):
  • Obtain decay resonance structure uncertainty for new modes ('Dalitz uncertainty')
  • Run MC with extra photon smearing; study signal lineshape changes; obtain systematic
  • Revisit DT lineshape systematics
  • See if any further handle can be obtained on DT background distributions
  • Investigate whether only taking direct Ds candidates for background-heavy modes improves BG shape systematics usefully; get systematic for this cut (= update ISR systematic)
  • Sensitivity to Ds* -> Ds e e BF?

2009-10-22

• Xin: Progress on the CLEOG constants and data43 events Link

2009-10-15

• Xin: Progress on the CLEOG constants and data43 events Link
• Souvik: Digging into pi0s and etas reconstructed in Ds tags.

2009-10-08

• Souvik: Updates on re-pass2 and re-Dskim of data.
• Xin: Use old particle table listing Link

2009-10-01

• Xin: Need to add gammaFSR in evt.pdl
• Souvik: Updates.

2009-08-06

• Souvik: pi0 -> e+ e- gamma decays can fake my signal. Generic MC study

2009-07-30

• Xin: Use old EvtGen DecayTree

2009-07-16

• Souvik: Ds*+ -> Ds+ e+ e- updates: Pion fit of electron tracks.
• Xin : MCInfo Progress

2009-07-02

• Xin:
  • PASS2 : 20041104_MCP2_A_
  • Problem in four-vector
• Souvik:
  • Work in progress for CLEO collaboration talk

2009-06-25

• Xin:
  • Pprogress diagram
  • Use old constants in new release => compare table

2009-06-18

• Xin:
  • Problem when using the old constants in new release => log file

• Souvik: Progress with D_s*+ -> D_s+ e+ e-

2009-06-11

• Xin:
  • Overview of recent progress
  • Data fitting

• Souvik: http://pages.physics.cornell.edu/~souvik/CLEO/scratch/

2009-06-04

• Xin:
  • Compare yields signal 7.06 regular2
  • Energy Shift Between Releases

2009-05-28

• Xin:
  • Compare yields signal 7.06 regular1
  • Energy of psi(3770) in MC truth

2009-05-21

• Xin: Yields Comparison Table, New Efficiency table, Efficiency comparison

2009-04-30

• Souvik: http://pages.physics.cornell.edu/~souvik/CLEO/scratch/

2009-04-23

• Xin:

  Problem

  Dskim Error Log, Src dir

• Souvik: Work in Progress

2009-04-09

• Xin:
  • Done: Use the same decay file, comparison of the yields => Table link
  • Discussion of the sigma => link

2009-04-02

• Xin:
  • Done: HadronicDNtupleProc from cvs head compiles. The fit runs OK except one mode. Comparison of the yields => Table link
  • Problem: HadronicDNtupleProc fit error on mode D0 to K pi => fit log file
  • Answer: check the decay file.

• Souvik:
  • Problem: Poor electron reconstruction at low Pt was distorting the reconstruction of the D_s*+ mass. Suspected because of pion fit for the electron.
  • Done: Electron refitted. New plots show the difference: Fit to pion hypothesis, Fit to electron hypothesis

• Open question: Anomalous Line-Shape => arxiv:0807.0494

2009-03-26

• Xin:
  • Done: CLEOG runs on 20080624_MCGEN, pass2 finished on 20041104_MCP2_A_1
  • Problem:
    1. DNtuple process not not work under 20050316_FULL
    2. HadronicDNtupleProc compile error under 20080228_FULL See error log => compile.txt

2009-03-12

• Xin:
  • Done: Fix bug on the comparison table => Signal, Data

2009-03-05

• Xin:
  • Done:
    1. Comparison yields for signal (with sigma) => Signal
    2. Comparison yields for data => Data
  • Todo:
    1. Add more digits to the sigma
    2. Clarify the formula of calculating the sigma and discuss with David
    3. Use Peter's Signal Decay file and the latest software release (and it's DECAY for for the non-tag side) to generate the signal MC

• Souvik:
  • Progress report on D_s+* -> D_s+, e+, e- decay channel WIP_5March2009.pdf

2009-02-26

• Xin : Comparison table of yields with photos 2.15 and new Dalitz structure => Table Link

2009-02-19

• Att: Anders, David, Peter, Souvik, Xin
• Done: Show the comparison table of yields => Table Link
• Discussion:
  1. The 1% difference for DtoKpi, statistical fluctuation?
  2. Photos version and Dalitz structure
  3. Random number seed from time and the IP address
  4. Reasons possible job crash due to certain machine
  5. For the full data sample, need to expand the ran numbers when generating MC

• Todo:
  1. Generate Signal MC with Peter's new Photos and Dalitz code
  2. Fix the bad pass2 jobs
  3. Check the TAG used for the MCBeamEnergyFromMCBeamParametersProd (No TAG)
  4. Run Code on 281 data

2009-02-05

• Attendants: Anders, David, Jim, Peter, Souvik, Xin
• Done: Checked out the HadronicDNtupleProc Code and Compiled
• Question: Ds*toDspi0, Ds gamma Strong decay supressed, why?
• Todo: Generate Signal MC for Kpi and compare the yields