OneAngle Code

To get the OneAngle Tranversity Code do the Following:

• cvs co Analysis/Bs2Jpsiphi/OneAngle
• cd src/ and make. Note currently the code complies only on slc3 machines with Root 5.16. This is due to the GLS library dependences.
• To run the code: cd exe/ and run the executable ravenFitter3: ./ravenFitter3 131000 Template/NominalParm.txt Template/Environment.txt
  

Very Early Results (Needs Updating)

Complete parameter list of nominal values used for the one angular Bs → J/Ψ Φ fit.

Explimation of Parameters:

• The definition of Φ _s, in the SM, is: Φ _s ∼ -2 χ = -2 λ ^2 η ∼ -0.04. This is what is used in our code.
  
• The definition of Δ Γ , from the PDG, is: Δ Γ = Γ_L - Γ_H.

Notes on Fitting Studies:

• Assume 130k events (Luis Fernandez CERN-THESIS-2006-042 'LFCERN') including detector and acceptances. Assume the background-to-signal ratio is 0.13 (LFCERN). Then the number of signal events will be 130k/1.15 = 113k events.
• Assume that with no detector acceptance 14%(my study!) more signal events occur. In other words, no acceptance implies 150k signal events.
  
• Three catagories of studies: 1) Perfect Detector Acceptance and Resolution 2) Perfect Detector Accpetance; but Detector Resolution 3) Detector Acceptance and Resolution.
• Within each catagory the following studies are performed:
  One Parameter Fit Parameter set value Φ_s -0.1, -0.2, -0.04 Rt 0.1, 0.15, 0.2 Δ Γ 0, 0.102, 0.136 Two Parameter Fit Γ and Δ Γ 0.68, 0.102 Φ_s and Δ Γ -0.04, 0.102 Φ_s and Rt -0.04, 0.2 Three Parameter Fit Φ_s, Δ Γ and Rt -0.04, 0.102, 0.2 Five Parameter Fit Φ_s, Δ Γ, Γ, w and Rt -0.04, 0.102, 0.68, 0.3, 0.2

One Parameter Fit Studies:

Correlation Fit Studies:

Many Parameter Fit Studies:

Note:

• (*)The above 5 parameter fit is nonsense! This is because w and Φ_s cannot be fitted simultaneously. The problem lies in MINUIT, which returns the from the fit the Nominal vaules for Φ_s and w; i.e. becuse in he fitting function, Φ_s and w are multiplied together, MINUIT simply shifts one prameter up - and the other one down - until it get the best fit, and ocurs at the parameters nominal values. This has been proved by performing a Log Likelihood scan on w and Φ_s parameters. Shown in Figure 1 below:

Useful Physics Talks:

• Luis Frenandez (Poland 2006): Luis_Frenandez.pdf
  
• Joan Van Huen (Japan 2006): JoanVanHunen.pdf
  
• Leandro de Paula (07/12/06): LHCbPhysicsExpectation.pdf For the Dec. 2006 International Workshop on the CKM Unitarity Triangle (Japan).