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Figures and Tables for Search for the Bs→μμ- and Bd→μμ- decay

Primary Authors: Douglas Glenzinski, Matthew Herndon, Walter Hopkins, Teruki Kamon, DaeJung Kong, Vyacheslav Krutelyov, Cheng-Ju Lin, David Sperka, Julia Thom, Satoru Uozumi

Table of Contents

Data Validation

  • Validation plots comparing kinimatic variable distribution for B+ sample of first 7 fb-1 and last 3 fb-1 of data: eps, png - Validation plots comparing NN input variables distribution for B+ sample of first 7 fb-1 and last 3 fb-1 of data: eps, png
  • Validation plots comparing NN input variables (cont.) distribution for B+ sample of first 7 fb-1 and last 3 fb-1 of data: eps, png
  • Validation plots comparing kinimatic variable distribution for dimuon sideband sample of first 7 fb-1 and last 3 fb-1 of data: eps, png
  • Validation plots comparing NN input variables distribution for dimuon sideband sample of first 7 fb-1 and last 3 fb-1 of data: eps, png
  • Validation plots comparing NN input variables (cont.) distribution for dimuon sideband sample of first 7 fb-1 and last 3 fb-1 of data: eps, png

Baseline Requirements

  • Yields after baseline requirements for B+: eps, png - Yields after baseline requirements for B+ separated into CC and CF: eps, png
  • Yields after baseline requirements for di-muon sample: eps, png

Neural Network (NN) Signal Discrimination

  • Table of NN input variables ranked in order of significance: png
  • Signal discrimination for NN input variables (variables ranked highest by NN): eps, png
  • Signal discrimination for NN input variables and additional kinematic variables: eps, png
  • Signal discrimination for NN input variables: eps, png
  • Signal discrimination for NN input variables (cont.): eps, png
  • NN output for MC Signal and mass sidebands for CC channel: eps, png
  • NN output for MC Signal and mass sidebands for CF channel: eps, png
  • NN output for MC Signal and mass sidebands for CC and CF combined: eps, png

Neural Network Cross Checks

  • Mass bias check (NN output vs Mass): eps, png
  • Mass bias check (Average NN output vs Mass) for OS- control sample: eps, png
  • Mass bias check (Averag NN output vs Mass) for FM+ control sample: eps, png
  • Training on inner and out mass sidebands and compare NN output for CC: eps, png
  • Training on inner and out mass sidebands and compare NN output for CF: eps, png
  • Signal and background efficiency for different SB training sets: eps, png
  • Background efficiency for NN's trained on different fractions of the data: eps, png
  • Background efficiency for NN's trained on different fractions of the data (zoomed into the NN>0.7): eps, png
  • Comparison of Bd and Bs MC NN output: eps, png

Combinatoric Background

  • Mass sideband distribution for all NN bins combined (used for slope of combinatoric background): eps, png
  • Blinded mass distributions for first 4 NN bins (0.7<NN<0.94) in CC: eps, png
  • Blinded mass distributions for last 4 NN bins (0.94<NN<1.0) in CC: eps, png
  • Blinded mass distributions for first 4 NN bins (0.7<NN<0.94) in CF: eps, png
  • Blinded mass distributions for last 4 NN bins (0.94<NN<1.0) in CF: eps, png
  • Full combinatoric table with information for all NN bins and mass bins for both CC and CF in Bs mass window: png
  • Full combinatoric table with information for all NN bins and mass bins for both CC and CF in Bd mass window: png

B→ hh Background

  • Fake Rates for pions and kaons as a function of pT for CC: eps, png
  • Fake Rates for pions and kaons as a function of pT for CF: eps, png
  • Cross check of NN distribution for fake rate pT dependence for CC: eps, png
  • Cross check of NN distribution for fake rate pT dependence for CF: eps, png
  • Full B→ hh table with information for all NN bins and mass bins for both CC and CF in Bs mass window: png
  • Full B→ hh table with information for all NN bins and mass bins for both CC and CF in Bd mass window: png

Cross Checks of Background Estimates with Control Samples

  • Control Table for CC and CF channels: png
  • Control Table combining all NN bins: png

Systematics of εNN

  • Comparison of kinematic variables and NN input variables for B+ data and MC: eps, png - Comparison of NN input variables for B+ data and MC: eps, png
  • Comparison of NN input variables for B+ data and MC (cont.): eps, png - εNN cross check table, comparig MC with data for B+ normalization mode: png

Signal Expectations

  • Summary table of acceptances and efficiencies: png
  • Table of Standard Model expectation for Bs: png

Unblinding

  • Unblinded mass distributions for first 4 NN bins (0.7<NN<0.94) in CC: eps, png
  • Unblinded mass distributions for last 4 NN bins (0.94<NN<1.0) in CC: eps, png
  • Unblinded mass distributions for first 4 NN bins (0.7<NN<0.94) in CF: eps, png
  • Unblinded mass distributions for last 4 NN bins (0.94<NN<1.0) in CF: eps, png

Results: Bd Signal Window

  • Di-muon Mass Plots: The hashed area represents the total uncertainty on the background estimate calculated by adding in quadrature the systematic uncertainty on the mean expected background in each bin with the associated poisson uncertainty.
    • Comparison of background and observations, combining CC and CF: eps, png
    • Comparison of background and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Di-muon Mass Plots: The hashed area represents the systematic uncertainty on the mean expected background while the error bars on the points represent the associated poisson uncertainty.
    • Comparison of background and observations, combining CC and CF: eps, png
    • Comparison of background and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Full table of expectations and observations: png

Results: Bs Signal Window

  • Di-Muon Mass Plots: The hashed area represents the total uncertainty on the background estimate calculated by adding in quadrature the systematic uncertainty on the mean expected background in each bin with the associated poisson uncertainty.
    • Comparison of background, 4.1xSM, and observations, combining CC and CF: eps, png
    • Comparison of background, 4.1xSM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
    • Comparison of background, SM, and observations, combining CC and CF: eps, png
    • Comparison of background, SM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Di-muon Mass Plots: The hashed area represents the systematic uncertainty on the mean expected background while the error bars on the points represent the associated poisson uncertainty.
    • Comparison of background, 4.1xSM, and observations, combining CC and CF: eps, png
    • Comparison of background, 4.1xSM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
    • Comparison of background, SM, and observations, combining CC and CF: eps, png
    • Comparison of background, SM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Full table of expectations and observations: png

Statistical Interpretation of excess in Bs signal window

  • p-value plot for background only null-hypothesis: eps, png
  • p-value for background only null-hypothesis using only the two highest NN bins (cross check): 2.0%
  • p-value for background only null-hypothesis using only the 3rd highest NN bin (cross check): 0.31%
  • p-value for SM+background null-hypothesis: 6.8%
  • p-value for SM+background null-hypothesis using only the two highest NN bins (cross check): 21.6%
  • p-value for Bd search window and background only null-hypothesis: 41%
  • Central value from Δχ2: eps, png
  • Central value from Δχ2 using only 2 highest NN bins
    • BR(Bs→ μμ-) = 1.0+0.8-0.6× 10-8 - 0.8× 10-9 < BR(Bs→ μμ-) < 2.5× 10-8 @ 90 C.L.
    • BR(Bs→ μ+μ-) < 2.9× 10-8 @ 95 C.L.
  • Comparison of 95% bounds of all experiments: eps, png

Consistency between new and old data set

  • Comparison of expected and observed dimuon mass sideband yield, all luminosity bins combined: png
  • Comparison of expected and observed dimuon mass sideband yield in first luminosity bin: png
  • Comparison of expected and observed dimuon mass sideband yield in second luminosity bin: png
  • Comparison of expected and observed dimuon mass sideband yield in third luminosity bin: png
  • Comparison of expected and observed dimuon mass sideband yield in fourth luminosity bin: png
  • Bd Full table of expectations and observations: png
  • Bd Di-muon Mass Plots: The hashed area represents the total uncertainty on the background estimate calculated by adding in quadrature the systematic uncertainty on the mean expected background in each bin with the associated poisson uncertainty.
    • Comparison of background and observations, combining CC and CF: eps, png
    • Comparison of background and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Bd Di-muon Mass Plots: The hashed area represents the systematic uncertainty on the mean expected background while the error bars on the points represent the associated poisson uncertainty.
    • Comparison of background and observations, combining CC and CF: eps, png
    • Comparison of background and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Bs Full table of expectations and observations: png
  • Bs Di-Muon Mass Plots: The hashed area represents the total uncertainty on the background estimate calculated by adding in quadrature the systematic uncertainty on the mean expected background in each bin with the associated poisson uncertainty.
    • Comparison of background, 4.1xSM, and observations, combining CC and CF: eps, png
    • Comparison of background, 4.1xSM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
    • Comparison of background, SM, and observations, combining CC and CF: eps, png
    • Comparison of background, SM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • Bs Di-muon Mass Plots: The hashed area represents the systematic uncertainty on the mean expected background while the error bars on the points represent the associated poisson uncertainty.
    • Comparison of background, 4.1xSM, and observations, combining CC and CF: eps, png
    • Comparison of background, 4.1xSM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
    • Comparison of background, SM, and observations, combining CC and CF: eps, png
    • Comparison of background, SM, and observations, separating CC and CF, but combining 5 lowest NN bins: eps, png
  • p-value for background only null-hypothesis: 82%
  • p-value for background only null-hypothesis using only the two highest NN bins (cross check): 67%
  • p-value for background only null-hypothesis using only the 3rd highest NN bin (cross check):44%
  • p-value for SM+background null-hypothesis: 48%
  • p-value for SM+background null-hypothesis using only the two highest NN bins (cross check): 44%
  • p-value for Bd search window and background only null-hypothesis: 47%
  • CLs Limits: BR(Bs→ μμ-) < 2.9× 10-8 @ 95% C.L. - CLs Limits: BR(Bd→ μμ-) < 9.0× 10-9 @ 95% C.L.

Date: 2012-10-04 11:44:45 CDT