E549/570 analysis page
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Search for Deeply-bound Kaonic Nuclear States
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| 4He(Stopped K-, N) spectroscopy |
| E471/549/570 collaboration at KEK |
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| Analysis: utilities and documents |
PAW manuals
CERNLIB manuals
Detector allignments of the experiment.
These were made from YIM-san's CAD files.
Macro and COMIS functions for the utility.
RPT 140 HR TDC calibration result for TKO crate 0 (beamline/VTC).
Dr T II calibration result for TKO crate 1 (BLC).
RPT 140 HR TDC calibration result for TKO crate 2 (PA/PB/NT L arm).
RPT 140 HR TDC calibration result for TKO crate 3 (PA/PB/NT R arm).
Dr T II calibration result for TKO crate 4 (VDCtop).
Dr T II calibration result for TKO crate 5 (VDCbottom).
Dr T calibration result for TKO crate 6 (PDC L/R).
TKO Crate0 pedestal data for E570 Oct. cycle
TKO Crate0 pedestal data for E570 Dec. cycle
Description and resources for re-constructed E549/570 raw data with drift chamber tracking information.
SDD-dedicated analysis results for E570. Self/E549-triggered data are separately prepared run-by-run.
documents for GEANT3 software package.
source files for GEANT3 simulation for gain tune.
E549 data analysis reports
2005 August 7th report - VDC analysis for cosmic ray - run-by-run variation of the resolution
2005 August 8th report - VDC analysis for cosmic ray - dt-dr reconstruction
2005 August 9th report - PDC analysis - to start with
2005 August 10th report - BLC analysis - investigation of plane relative shift and dt-dx reconstruction
2005 August 11th report - Spline correction for VDC tracking
2005 August 12th report - Study on the long-term stability of the spline correction
2005 August 23th report - Track reconstruction by PDC
2005 August 25th report - Track reconstruction by VDC - again
2005 August 26th report - Elimination of VDCbottom rotation and shift
2005 August 29th report - PDC tracking - study of plane shift
2005 September 1st report - Study of BLC position
2005 September 9th report - Extension of the available run number of chamber tracking
2005 September 10th report - Study of PDC position by pion-scatter run 292
2005 September 14th report - TDC calibration
2005 September 17th report - T0 analysis 1 (Slewing correction and T0 time resolution)
2005 September 24th report - T0 analysis 2 (Stop K selection procedure and T0-BLC consistency)
2005 September 27th report - PA-PB analysis - first stage 1 (preliminary:with K+ run)
2005 Nobember 6th report - PA-PB analysis - first stage 2 (further study for PA->PB TOF with K+ run)
2005 December 2nd report - PDC tracking - PA retiming and long-term stability of the resolution
2005 December 9th report - PA->PB TOF study for K+ runs
2006 May 5th report - VDC tracking - finalization
2006 May 9th report - PDC tracking - finalization
2006 May 12th report - BLC tracking - finalization
2006 May 14th report - Chamber positionning study - finalization
2006 May 17th report - Re-consideration of the TOF analysis procedure
2006 May 26th report - (stopped K+,X) spectrum by PA-PB
2006 May 31th report - PA-PB/T0-PA TOF analysis for (&pi-, X) (1)
2006 June 7th report - T0-PA TOF analysis for (K-, X) (1)
2006 June 9th report - PA-NT TOF analysis with (K+, X)
2006 June 15th report - Study of (stopped K-, X0) spectrum with T0-NT (1)
2006 June 20th report - Tune of T0 gain variation/nonlinearity - finalization
2006 June 24th report - Tune of T0-PA time walk by (K-,X) with PA-PB-detected velocity (PB fixed) (1)
2006 June 27th report - Tune of PB time walk by (K-,X) fixing PA time (1)
2006 July 3rd report - Tune of T0-PA time walk by (K-,X) with PA-PB-detected velocity (PB fixed) (2)
2006 July 4th report - Tune of PB time walk by (K-,X) fixing PA time (2)/Finalization of T0/PA time offset tune
2006 July 5th report - Tune of PB time walk by (K-,X) fixing PA time (3)
2006 July 9th report - Tune of NT time walk by (K-,X) fixing PA time
2006 July 13th report - Study of (stopped K-, X0) spectrum with T0-NT (2)
2006 July 16th report - Study of (stopped K-, X0) spectrum with T0-NT (3)
2006 July 19th report - (stoppedK-,n) semi-inclusive spectrum W/W.O. VETO
2006 July 22th report - Proton ID function on PB/NT arm
2006 July 24th report - Energy loss correction and Kstop->PA TOF calculation for PA-PB-detected velocity for proton
2006 Aug 1st report - PA-PB/T0-PA TOF analysis for (π-, X) (2)
2006 Aug 7th report - PA-PB/T0-PA TOF analysis for (K-, X) (2)
2006 Aug 21th report - (stoppedK-, p) inclusive spectrum and its classification with reaction timing/DCA
2006 Aug 24th report - Spectrum Normalization (1) - normalization of proton inclusive spectrum by free decay rate
2006 Oct 3rd report - p/π separation on TC-VDC arm
2006 Oct 25th report - Definition of π-momentum
2006 Nov 11th report - (stopped K^-, n onNT:p/π onTC) coincidence spectrum and VcaVn selection
2006 Nov 17th report - (stopped K^-, p onPB/NT:p/π onTC) coincidence spectrum and VcaVp selection
2006 Nov 25th report - Proton and neutron spectra from (stopped K^-, p/π onPA/PB/NT:n onNT) events
2006 Dec 18th report - Monte-Carlo on the invariant mass resolution for Λ/Σ hyperons
2006 Dec 26th report - TC TOF Analysis
2007 Jan 13th report - pπ and Λp/Λn invariant mass spectra from pp/pn + π on TC events (1)
2007 Jan 26th report - nπ and Σ- p invariant mass spectra from pn + π on TC events
2007 Jan 29th report - n-π invariant mass from 2n-1π events for (Σ+-,n) invariant mass study
2007 Feb 2th report - A better identification procedure of Λ
2007 Feb 13th report - 4He(stopped K-, Λp/n)X / 4He(stopped K-, Σ- p)X missing mass spectra and their relationship between YN invariant mass spectra
2007 Mar 6th report - General discussion of YN correlation analysis
2007 Mar 30th report - Generalization of Λ reconstruction/ΛN correlation analysis
2007 Apr 3rd report - Generalization of Σ reconstruction/ΣN correlation analysis
E570 data analysis reports
Low-level analysis results....
2007 Apr 20th report - Tune of T0 gain variation/nonlinearity :E570
2007 Apr 26th report - Charged particle TOF calibration for PAPB by (stopped K+, X+) data : E570
2007 May 2nd report - Charged particle TOF calibration for NT with PA by (stopped K+,X+) data : E570
2007 May 5th report - T0 TOF analysis by π+/- beam-triggered data : E570
2007 May 7th report - T0->PA TOF analysis and T0->PA->PB time walk study by (stopped K-,X+/-) data : E570
2007 May 15th report - NT time walk study by (stopped K-, X+/-) data : E570
2007 May 17th report - Proton ID function on PB/NT arm : E570
2007 May 18th report - Fine tune of NT slewing correction function with (stopped K-, X+-γ) events : E570
2007 May 23th report - T0->TC TOF analysis: E570
2007 May 27th report - Event selection on TC-related variables and charged particle spectra on TC: E570
2007 June 26th report - Study of DAQ-related quantities by VME scalers : E570
2007 July 11th report - Possible improvement of proton/deuteron selection procedure on side arm
Robustness/quality estimation of the T0->PA->PB charged particle TOF analysis with (π+-, X+/-) charged-triggered data: E570
Robustness/quality estimation of T0->NT neutral particle TOF analysis with Σ+/-stopped->n π+/- : E570
Discussion on the E570 nucleon spectra....
2007 July 4th report - Spectrum Normalization (1) - discussion on the normalization of proton/deutron/Λ inclusive spectra by Kaon free decay rate: E570
2007 July 5th report - Spectrum Normalization (2) - discussion on the normalization of X-ray spectra under coincidence condition
2007 July 10th report - Spectrum Normalization (3) - discussion on the normalization of neutron spectra under coincidence condition: E570
(stopped K-, p) inclusive spectrum and its classification with reaction timing/DCA:E570
(stopped K-, pX+-) coincidence spectra:E570
(stopped K-, n) semi-inclusive spectrum and VETO-related studies:E570
(stopped K-, nX+-) coincidence spectra:E570
YN correlation analysis on E570....
2007 May 29th report - Λ reconstruction/ΛN correlation analysis:E570
2007 June 12th report - Σ reconstruction/ΣN correlation analysis:E570
Final steps for di/tri-baryon search for E549/570
2007 June 11th report - Λp/Λn correlation analysis
2007 June 19th report - Σ-p/Σn correlation analysis
2007 June 20th report - Deuteron spectra/Yd correlation analysis (1)
2007 July 13th report - Acceptance study and normalization of 4He(stopped K-, d) spectrum
2007 July 21th report - Acceptance study of inclusive Λ momentum and Λd coincidence measurement
2007 Dec 19th report - Deuteron spectra (2)
2007 Dec 23th report - Yd correlation analysis (2)
2008 Feb 12th report - Cycle-by-cycle estimation of stopped K- number from K-μ2 decay peak
2007 Dec 28th report - Generalized acceptance of Yd/YN spectra - principle and formulation
2008 Jan 14th report - Generalized acceptance of Λd spectra (1)
2008 Feb 4th report - Generalized acceptance of Λd spectra (2)
2008 March 1st report - Normalized Λd spectra
2009 Aug 18th report - Generalized acceptance of Λp/Λn spectra
2008 March 9th report - A systematic study of neutron detection efficiency
2010 Apr. 21th report - The final form of normalized deuteron spectra and deuteron momentum resolution
2010 Apr. 27th report - Normalized proton spectra with E549+E570 100% statistics
2010 May 11th report - The evaluation of per-stopped-K- formation rate of (4He-K-)atomic -> &Lambda + t four-nucleon absorption process (1)
2010 May 19th report - The evaluation of per-stopped-K- formation rate of (4He-K-)atomic -> &Lambda + t four-nucleon absorption process (2)
2010 May 23th report - Normalized Λp spectra (1)
2010 May 25th report - Analysis of ΛN+N events (1)
Normalized Λn spectra (1)
Normalized Λp spectra (2)
Normalized Λn spectra (2)
Normalized Λn spectra (3)
Hypernuclear non-mesonic two-body decay search in E549/570
2007 Dec 1st report - back-to-back dd correlation and 4&LambdaHe -> dd decay
2007 Dec 7th report - Gain tune for PA and a search for 4&LambdaHe -> tp decay
2010 Apr 29th report - Final evaluation of per-stopped-K- formation rate of 4&LambdaHe -> d + d decay
2010 May 6th report - Final evaluation of per-stopped-K- upper limit of 4&LambdaHe -> p + t decay
Today's Progress 25. May 2010 (Updated timely)
Analysis of ΛN+N events (1)
Here, we try to analyze ΛN (case1-180deg)+N(on TC) events.
Later, we can extend it to ΛN (case2-90deg)+N(on PB-NT) to cover another angular region.
Advantage of ΛNN coincidence measurement
In order to investigate further the nature of the observed spctrum strengths, the ΛNN events are effectively used as follows:
1. Separation of reaction final state by MM(ΛNN) - we can distinguish wheter the missing particles are N / N+π / N+γ.
2. Separation of 3S/2S/4NA (Process group α)VS 3NA/2NA+ΣΛ conv/2NA(Λ)+elastic rescattering (Process group β), by IM(ΛNN) - the former reactions do not have any spectator, so that we do not expect a sub-threshold peak in the IM(ΛNN) spectrum corresponding to the spectator momentum, if the former reaction dominates each component. If the latter dominates, we expect ≈50% of events clusters to the sub-threshold peak structure. Then another ≈50% corresponds to the case that the spectator is also detected, and a participant is missing. It should be noted that this separation can be applyed only if the final state is ensured as ΛNNN by MM(ΛNN).
Therefore, we are highly interested in the issues:
Which final state dominates A/B/C components?
and finally
Which reaction group dominates A/B/C components?
Therefore, we try to construct MM(ΛNN) and IM(ΛNN) with
1. Λ p (case1 180deg) + n (on TC),
2. Λ n (case1 180deg) + n (on TC),
and
3. Λ n (case1 180deg) + p (on TC) events.
The similar analysis is possible in future for case2-90deg topology -
4. Λ p (case2 90deg) + n (on NT),
5. Λ n (case2 90deg) + n (on NT),
6. Λ n (case2 90deg) + p (on PA-PB-NT),
where the best mass resolutions are expected.
Classification