Some investigations on Shower in Aug11 DST Szymon Harabasz Version: 15 November 2015

PID plot 2

mass 3

Pre – RPC correlations 4

All RPC clusters to all Pre hits in event Closest RPC clusters matched with all tracks to all Pre hits in event 5

6 Selct only bottom parts of both detectors Correlation fairly better!

All RPC clusters to all Pre hits in event Closest RPC clusters matched with all tracks to all Pre hits in event 7

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cand with different cuts Positive particlesNegative particles 9

Positive particlesNegative particles Φ cand with different cuts 10

Angular distributions all Particle Candidates Positive particlesNegative particles 11

Angular distributions Particle candidates matched with Pre and correlated with Post I Positive particlesNegative particles 12

Row-Col for Shower hits best matched with particle candidates Positive particlesNegative particles 13

cand vs. Shower hit row Aug 11 Positive particlesNegative particles 14

All particlesNegative particles cand vs. Shower hit row Nov 10 Why previously there was no problem to calculate efficiency in bottom rows? 15

Sum0 vs. momentum Negative pionsProtons π-π- 16

Sum1 vs. momentum Protons π-π- 17

Sum2 vs. momentum Protons π-π- 18

Sum1-Sum0 vs. Momentum sector 1 Protons π-π- 19

Sum2-Sum0 vs. Momentum sector 1 Protons π-π- 20

Mean Sum0 - protons 21

Mean Sum1 - protons 22

Mean Sum2 - protons 23

Mean Sum0 – π - 24

Mean Sum1 – π - 25

Mean Sum2 – π - 26

Shower alignment not perfect? 27

Shower alignment not perfect? 28

Digitization 29

Eff Pre ( β ) All particles Negative particles 30

Eff Post I ( β ) All particles Negative particles 31

Eff Pre ( position ) Negative particles All particles 32

Eff Post I ( position ) Negative particles All particles 33

HParticleTrackSorter - how does it work? Fill internal structures from HParticleCand by calling Int_t HParticleTrackSorter::fill(Bool_t (*function)(HParticleCand* )) (eg. Bool_t HParticleTrackSorter::selectHadrons(HParticle Cand* pcand) ) For accepted objects flags are evaluated Int_t selectBest(HParticleTrackSorter::ESwitch byQuality, Int_t byParticle) sets isBest... flags (here also kIsUsed is marked) 34

Looking for leptons 35

First attempt Read data from all HparticleCands, write it to ntuple, apply conditions when drawing histograms with Draw method Meta matching quality < 4 Average charge > 70 Inner segment chi2 > 0 RK chi2 < 1000 Graphical cut: 36

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System 0, p < 150 MeV/c System 1, 200 < p < 300 MeV/c 39

Next attempts Second: The same conditions as in the first attempt plus kIsUsed flag Third: The same conditions as in the first attempt plus flags: kIsAcceptedHitRICHMDC kIsAcceptedHitInnerMDC kIsAcceptedHitOuterMDC kIsAcceptedRKMETA 40

∆ θ RICH – Track, System 0 All histograms in one figure scaled to (almost) common maximum value 41

∆ θ RICH – Track, System 1 42 All histograms in one figure scaled to (almost) common maximum value

Second attempt Third attempt 43

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Fourth attempt 46 Read data from all HparticleCands, write it to ntuple, apply conditions when drawing histograms with Draw method Meta matching quality < 4 Average charge > 70 Inner segment chi2 > 0 RK chi2 < 1000 β > 0.9

47 Fourth attempt

48 Fourth attempt – positive particles

49 Fourth attempt – negative particles

50 Fourth attempt Scaled to common max value (on both plots separately)

51 Fourth attempt Scaled to common max value (on both plots separately)

Shower response on leptons? 52

53 Fourth attempt

Shower response on leptons 54

Sideband method 55

Sideband method 56

Sideband method 57

Sideband method 58

Sideband method 59 Everything After sideband background subtraction

Sideband method 60 Everything After sideband background subtraction

Sideband method 61 Everything After sideband background subtraction

Sideband method 62 Everything After sideband background subtraction Oops…

Sideband method 63 Everything After sideband background subtraction

Sideband method 64 Everything After sideband background subtraction

Sideband method 65 Everything After sideband background subtraction Something is wrong in some sumdiff bins. Let’s check it.

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Sideband method in sumdiff bins 70

Sideband method in sumdiff bins 71

Sideband method in sumdiff bins 72

Sideband method in sumdiff bins 73

Sideband method in sumdiff bins 74

Sideband method in sumdiff bins 75

Time of flight 76 Everything After sideband background subtraction

Backup slides 77

Sum0, Sum2 > 0 78

Post I efficiency 79

Sum0, Sum1, Sum2 > 0 80

Sum0, Sum1 > 0 and RPC cluster exists 81

Sum1 > 0 and RPC cluster exists 82

Pre efficiency Sum0 is always > 0 83

Shower Hit Row-Col – cands matched with Pre and correlated with Post I All particlesNegative particles 84

Theta for all and negative particle candidates All particlesNegative particles Here all tracks matched with Shower are considered 85

Phi for all and negative particle cands Here tracks matched with Shower and RPC at the same time are considered 86

Sum0 & Sum1 vs. beta Protons π-π- 87

Shower alignment not perfect? Pre to Track matching quality as a function of a position on the detector 88