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Mystery in Signal MC Analysis: UDSC DeltaE Peak Issue & MM2 vs Lepton MMT

Investigating data discrepancies in signal MC analysis involving UDSC deltaE peak and MM2 vs Lepton MMT. Reviewing code, fitting functions, and interpreting histograms to resolve issues and improve analysis accuracy.

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Mystery in Signal MC Analysis: UDSC DeltaE Peak Issue & MM2 vs Lepton MMT

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  1. Labgroupmeeting20100216 YoungminSiksYook

  2. SignalMC -> sideband region check • UDSC deltaE peak issue • MM2 vs Lepton MMT 2-D fit

  3. Signal MC Upper picture’s cut -> 2.0<Mbc<2.5, abs(dE)>0.2 Lower picture’s cut -> 2.0<Mbc<2.5, abs(dE)<0.2 1. Even though there might have been some misconception, still a mystery why no events are recorded in the histogram. 2. Seems like Dr.Cho used another *.cc file for this analysis

  4. UDSC deltaE peak issue Upper: Charm’s Mbc-de Lower: UDS’s Mbc-de Red Line: Has been given cross-like cuts

  5. Some comments The only E-related cut terms is the chi2(best_chi2) in the chooseBestCandidate() function. The code inputs frecB('visual' value of the iterator of the Fullrecon_manager).Aux1() into an integer 'chi2'. Then the code chooses the minimum value and the id of the track meeting the condition. However, since chi2 contains deltaE as the variable - though there are other factors related to D-mass -, it is likely for one to assume that there has been filtering of deltaE partly from this condition.

  6. Mbc-Lp 2-dim fitting FCN=4382.2 FROM MIGRAD    STATUS=CONVERGED     596 CALLS         597 TOTAL                     EDM=4.36491e-11    STRATEGY= 1  ERROR MATRIX UNCERTAINTY   1.4 per cent  EXT PARAMETER                                   STEP         FIRST     NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE    1  p0           4.49532e+01   7.94449e-01   4.53411e-05  -4.68881e-06   2  p1           1.01569e-02   3.30381e-03  -9.95316e-08   4.25362e-04 ->mean   3  p2           3.40918e-01   4.21954e-03  -2.48876e-07  -1.15059e-03   4  p3           2.64198e+00   1.73407e-03  -1.72410e-07  -6.15152e-03 ->mean   5  p4           1.31657e-01   1.86935e-03  -8.92631e-08  -3.08521e-03 FCN=1473.44 FROM MIGRAD    STATUS=CONVERGED     199 CALLS         200 TOTAL                     EDM=1.64984e-12    STRATEGY= 1  ERROR MATRIX UNCERTAINTY   1.2 per cent  EXT PARAMETER                                   STEP         FIRST     NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE    1  p0           4.91062e+02   6.66291e+00  -1.17586e-03   6.72592e-09   2  p1           9.30235e-03   2.96586e-03   9.36015e-08  -6.33226e-04 ->mean   3  p2           3.52394e-01   3.77372e-03  -9.36047e-07  -3.68953e-04 Left: Fitted with 2-d Gaussian Pretty intriguing to decide the function for the lp side Right: Fitted with Gaussian About MM2

  7. ToDos • Get the ‘SignalMCpart of Dr.Cho’snote’ histo • …and relate with the other analysis I’ve done • Figure of Merit • About the same part of the note: - get to know about Estimated yields on MM2 distribution from each MC data

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