Violation in Mixing

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92 Ã Ë reconstruction and efficiency studies 20000 17500 15000 12500 10000 ID Entries Mean RMS UDFLW OVFLW ALLCHAN 1000 8736930 0.8675 0.5464 0. -132.1 0.1899E+06 18000 16000 14000 12000 10000 8000 7500 6000 5000 4000 2500 2000 0 0 1 2 3 4 5 0 data (sideband and off-res subctracted) pks 20000 17500 15000 12500 10000 7500 5000 2500 0 ID Entries Mean RMS UDFLW OVFLW ALLCHAN 1000 8736930 0.8675 0.5464 0. -132.1 0.1899E+06 0 1 2 3 4 5 data-mc comparison (lumi norm.) pks 0.1 0.08 0.06 0.04 0.02 ID Entries Mean RMS UDFLW OVFLW ALLCHAN 10000 2304439 0.8594 0.5005 0. -11.19 0.1768E+06 0 1 2 3 4 5 mc bbar pks ID Entries Mean RMS UDFLW OVFLW ALLCHAN 1000 8736930 0.8675 0.5464 0. -132.1 0.1899E+06 0 0 1 2 3 4 5 data-mc comparison (area norm.) pks Figure 3-12. Ã Ë reconstructed momentum: the Ã Ë momentum in �� events in data is obtained from a side-band and off-resonance subtraction and compared with the Ã Ë momentum in �� Monte Carlo events. The comparison is done with both a luminosity normalization and an area normalization. Again possible dependencies of the reconstructed Ã Ë mass and resolution on flight length and momentum are investigated: Fig. 3-16 shows the invariant mass and resolution of the reconstructed Ã Ë as function of modes efficiency # Ã Ë (%) per event � � 96.0 0.32 � � 96.2 0.29 84.8 0.27 Ù�× 75.7 0.17 Table 3-4. Event selection efficiency of the hadronic selection in generic Monte Carlo events used in this analysis and the number of Ã Ë per event after the hadronic selection from the Monte Carlo truth. MARCELLA BONA
3.3 Studies on data 93 Figure 3-13. Values of the Ã Ë efficiency corrections for block 1 (left) and block 2 (right) data. The red dots represent the corrections with the 1GeV momentum cut, while the black one are the values obtained from the no momentum-cut sample. the 2-dimensional flight length. Note that, with respect to Run 1 distributions (see Fig. 3-6), there is not any more a drop at the end of the SVT (around cm). This should be due to an improved alignment of the SVT itself. Fig. 3-17 show the invariant mass and resolution of the reconstructed Ã Ë as function of the Ã Ë momentum. The high statistics allows for very stable fits in almost all bins and the mass distribution shows a very good agreement with the PDG mass [14], with the exception of the low momentum values where the Run 1 behaviour with a positive slope is still present (compare to Fig. 3-7). Ã Ë RECONSTRUCTION AND EFFICIENCY STUDIES
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ÍÒ�Ú�Ö×�Ø��
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Contents Introduction . ...........
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4 Strategy and Tools for Charmless
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7.2 Branching fraction � � �
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Introduction The main goal of the B
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1 �È Violation in the �� Sys
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1.2 Neutral � Mesons 7 Note, howe
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1.2 Neutral � Mesons 9 Applying t
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1.2 Neutral � Mesons 11 �È �
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1.2 Neutral � Mesons 13 ��
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1.2 Neutral � Mesons 15 � ¡�
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1.2 Neutral � Mesons 17 and � a
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1.2 Neutral � Mesons 19 given tim
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1.3 The Three Types of �È Violat
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1.4 �È Violation in the Standard
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1.5 Determination of « 37 1.5 Dete
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1.5 Determination of « 39 Assuming
Page 47 and 48: 1.5 Determination of « 41 Figure 1
Page 49 and 50: 1.5 Determination of « 43 b q (a)
Page 51 and 52: 1.5 Determination of « 45 � �
Page 53 and 54: 2 The BABAR Experiment 2.1 Physics
Page 55 and 56: 2.1 Physics at � � B Factory op
Page 57 and 58: 2.2 The BABAR detector. 51 Integrat
Page 59 and 60: 2.2 The BABAR detector. 53 The dete
Page 61 and 62: 2.2 The BABAR detector. 55 two oute
Page 63 and 64: 2.2 The BABAR detector. 57 SVT Effi
Page 65 and 66: 2.2 The BABAR detector. 59 324 1015
Page 67 and 68: Efficiency 2.2 The BABAR detector.
Page 69 and 70: 2.2 The BABAR detector. 63 2.2.4 Th
Page 71 and 72: entries per mrad 2.2 The BABAR dete
Page 73 and 74: 2.2 The BABAR detector. 67 entries
Page 75 and 76: 2.2 The BABAR detector. 69 energies
Page 77 and 78: 2.2 The BABAR detector. 71 The main
Page 79 and 80: Efficiency 2.2 The BABAR detector.
Page 81 and 82: 2.2 The BABAR detector. 75 Table 2-
Page 83 and 84: 3 Ã Ë reconstruction and efficien
Page 85 and 86: 3.3 Studies on data 79 19.5° BINS
Page 87 and 88: 3.3 Studies on data 81 ¯ off-reson
Page 89 and 90: 3.3 Studies on data 83 0.504 0.502
Page 91 and 92: 3.3 Studies on data 85 0.03 0.025 0
Page 95 and 96: 3.3 Studies on data 89 N(π + π -
Page 97: 3.3 Studies on data 91 0.508 0.506
Page 103 and 104: 4 Strategy and Tools for Charmless
Page 105 and 106: 4.2 Event selection 99 channel sele
Page 107 and 108: 4.2 Event selection 101 ÀÐ �
Page 109 and 110: 4.2 Event selection 103 Figure 4-2.
Page 111 and 112: 4.3 Background fighting 105 Figure
Page 113 and 114: 4.4 PID selection 107 In the case o
Page 115 and 116: 4.4 PID selection 109 θ c Cut Effi
Page 117 and 118: 4.5 Tracking Corrections 111 Ë�
Page 119 and 120: 4.6 Analysis methods 113 Ñ�Ë si
Page 121 and 122: 4.6 Analysis methods 115 Events/2.5
Page 123 and 124: 4.6 Analysis methods 117 Figure 4-1
Page 125 and 126: 4.6 Analysis methods 119 θ c radia
Page 127 and 128: 5 Measurement of Branching Fraction
Page 129 and 130: 5.2 Ã Ë reconstruction 123 1 0.8
Page 131 and 132: 5.3 Analysis Strategy 125 0.35 0.3
Page 133 and 134: 5.4 Background Suppression and PDF
Page 139 and 140: 5.5 Maximum likelihood analysis 133
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5.5 Maximum likelihood analysis 143
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5.6 Counting analysis 145 Table 5-1
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5.7 Determination of branching frac
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6 Measurement of Branching Fraction
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6.3 The maximum likelihood analysis
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6.4 Counting analysis 157 120 100 8
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6.5 Analysis choice 159 6.5 Analysi
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6.6 Results on the Run1 data-set 16
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6.7 Determination of the branching
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7 Analysis of the time-dependent
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7.3 Analysis strategy 167 Parameter
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7.4 Data samples and event selectio
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7.4 Data samples and event selectio
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7.5 Background characterization 173
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7.5 Background characterization 175
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7.8 Validation studies 185 Figure 7
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7.8 Validation studies 187 100 75 5
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7.8 Validation studies 189 Figure 7
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7.8 Validation studies 191 Paramete
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7.9 Results 193 Parameter Fit Resul
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7.9 Results 195 Events/2 MeV/c 2 Ev
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7.10 Systematic studies 197 Categor
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7.11 Summary 199 �Ã� Ë��
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7.11 Summary 201 �Ã� Ë��
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7.11 Summary 203 Variation �Ã�
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BIBLIOGRAFIA 205 Bibliografia Chapt
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BIBLIOGRAFIA 207 [38] J. Charles, P
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BIBLIOGRAFIA 209 Chapter 7 [67] D.
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