Same Side Kaon Tagging Studies in Fully Reconstructed Decays

Same Side Kaon Tagging Studies in Fully Reconstructed Decays

This web page provides distributions and tables of a detailed study performed to develop a B flavor tagging algorithm, based on the charge correlation between the signal B meson and the fragmentation tracks produced nearby. Based on Monte Carlo events, we evaluate the performance of different Same Side Tagger (SST) algorithms on B+, Bd and Bs decay modes. We develop and optimize a tagging algorithm using kaon identification and dilution parameterization.

S_D &sdot &radic&lang D²(B_s &rarr D_s&pi, data)&rang = 28.3 + 3.2 - 4.2 %

&epsilon D² = 4.0 + 0.9 - 1.2 %

This is the web page summarizing results of the Same Side (Kaon) Tagger analysis. These results were produced as part of the CDF ongoing effort in a Bs mixing analysis.

A complete version of the results can be found in the CDF note 8206

Below are the eps versions of tables from the note meant for downloads.

Final results

Table 1 Average dilution for max plrel algorithm
Table 2 Average dilution for max PID algorithm
Table 3 Dilution scale factor for parameterized plrel algorithm
Table 4 Dilution scale factor for parameterized PID algorithm

Systematic uncertainties

Table 5 Efficiency
Table 6 Average dilution for max plrel algorithm
Table 7 Average dilution for max PID algorithm
Table 8 Dilution scale factor for parameterized plrel algorithm
Table 9 Dilution scale factor for parameterized PID algorithm
Table 10 Data-MC agreement

Below are the eps versions of figures meant for downloads.

Data-MC comparison of average dilution

Figure 1 max plrel algorithm
Figure 2 max PID algorithm

Data-MC comparison of parameterized dilution

Figure 3 Dilution scale factor for parameterized plrel algorithm
Figure 4 Dilution scale factor for parameterized PID algorithm
Figure 5 Effective dilution for parameterized plrel algorithm
Figure 6 Effective dilution for parameterized PID algorithm

Resonances / V0's

Figure 7 phi
Figure 8 K*
Figure 9 Ks

Data-MC tagging tracks multiplicity before and after PID > 1 cut

Data-MC tagging tracks pt before and after PID > 1 cut

Data-MC tagging tracks ptrel before and after PID > 1 cut

Data-MC tagging tracks plrel before and after PID > 1 cut

PID information

Figure 34 B+ &rarr D0bar pi+ log(LH(dEdx))
Figure 35 B+ &rarr D0bar pi+ log(LH(TOF))
Figure 36 B+ &rarr D0bar pi+ log(LH(PID))
Figure 37 Bd &rarr D- pi+ log(LH(dEdx))
Figure 38 Bd &rarr D- pi+ log(LH(TOF))
Figure 39 Bd &rarr D- pi+ log(LH(PID))
Figure 40 Bs &rarr Ds- pi+ log(LH(dEdx))
Figure 41 Bs &rarr Ds- pi+ log(LH(TOF))
Figure 42 Bs &rarr Ds- pi+ log(LH(PID))

Predicted dilution as a function of the tagging track transverse momentum

Figure 43 B+ &rarr D0bar pi+ agreeing case
Figure 44 B+ &rarr D0bar pi+ disagreeing case
Figure 45 Bd &rarr D- pi+ agreeing case
Figure 46 Bd &rarr D- pi+ disagreeing case
Figure 47 Bs &rarr Ds- pi+ agreeing case
Figure 48 Bs &rarr Ds- pi+ disagreeing case

Predicted dilution as a function of PID

Figure 49 B+ &rarr D0bar pi+ agreeing case (data+MC)
Figure 50 B+ &rarr D0bar pi+ disagreeing case (data+MC)
Figure 51 B+ &rarr D0bar pi+ agreeing case (MC only)
Figure 52 B+ &rarr D0bar pi+ disagreeing case (MC only)
Figure 53 Bd &rarr D- pi+ agreeing case
Figure 54 Bd &rarr D- pi+ disagreeing case
Figure 55 Bs &rarr Ds- pi+ agreeing case
Figure 56 Bs &rarr Ds- pi+ disagreeing case

Variations of some Monte Carlo distributions with respect to data

Figure 57 Number of tagging tracks
Figure 58 Transverse momentum of the B candidates
Figure 59 Tagging tracks PID (max plrel algorithm)
Figure 60 Tagging tracks plrel (max plrel algorithm)
Figure 61 Tagging tracks PID (max PID algorithm)
Figure 62 Tagging tracks plrel (max PID algorithm)

Lund variations for systematic studies

Figure 63 Lund variations

Systematic uncertainties in Monte Carlo compared with data values

Figure 64 B+ &rarr D0bar pi+ tagging tracks multiplicity
Figure 65 B+ &rarr D0bar pi+ tagging tracks multiplicity (PID > 1)
Figure 66 B+ &rarr D0bar pi+ log(LH(dEdx))
Figure 67 B+ &rarr D0bar pi+ log(LH(TOF))
Figure 68 B+ &rarr D0bar pi+ log(LH(PID))
Figure 69 Bd &rarr D- pi+ tagging tracks multiplicity
Figure 70 Bd &rarr D- pi+ tagging tracks multiplicity (PID > 1)
Figure 71 Bd &rarr D- pi+ log(LH(dEdx))
Figure 72 Bd &rarr D- pi+ log(LH(TOF))
Figure 73 Bd &rarr D- pi+ log(LH(PID))
Figure 74 Bs &rarr Ds- pi+ tagging tracks multiplicity
Figure 75 Bs &rarr Ds- pi+ tagging tracks multiplicity (PID > 1)
Figure 76 Bs &rarr Ds- pi+ log(LH(dEdx))
Figure 77 Bs &rarr Ds- pi+ log(LH(TOF))
Figure 78 Bs &rarr Ds- pi+ log(LH(PID))

Additional Material:

HEPG ancestors

Figure 79 B+ &rarr D0bar pi+ kaon ancestor
Figure 80 B+ &rarr D0bar pi+ pion ancestor
Figure 81 B+ &rarr D0bar pi+ proton ancestor
Figure 82 B+ &rarr D0bar pi+ lambda ancestor
Figure 83 Bd &rarr D- pi+ kaon ancestor
Figure 84 Bd &rarr D- pi+ pion ancestor
Figure 85 Bd &rarr D- pi+ proton ancestor
Figure 86 Bd &rarr D- pi+ lambda ancestor
Figure 87 Bs &rarr Ds- pi+ kaon ancestor
Figure 88 Bs &rarr Ds- pi+ pion ancestor
Figure 89 Bs &rarr Ds- pi+ proton ancestor
Figure 90 Bs &rarr Ds- pi+ proton ancestor

HEPG dilution dependence on the transverse momentum of the tagging track

Figure 91 B+ &rarr D0bar pi+
Figure 92 Bd &rarr D- pi+
Figure 93 Bs &rarr Ds- pi+

Efficiency and dilution dependence on B** fraction for max plrel algorithm