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LABGROUPMEETING20100216

Youngmin Siks Yook

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

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Signal MC

Upper picture’s cut -> 2.0<Mbc<2.5, abs(dE)>0.2Lower picture’s cut -> 2.0<Mbc<2.5, abs(dE)<0.21. Even though there might have been some miscon-ception, still a mystery why no events are recorded in the histogram.2. Seems like Dr.Cho used another *.cc file for this analysis

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UDSC deltaE peak issue

Upper:Charm’s Mbc-deLower:UDS’s Mbc-de

Red Line:Has been given cross-like cuts

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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.

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Mbc-Lp 2-dim fitting

Left:Fitted with 2-d GaussianPretty intriguing to decide the function for the lp side

Right:Fitted with GaussianAbout MM2

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

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ToDos

Get the ‘SignalMC part of Dr.Cho’s note’ 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