To use the macro, download root files with histograms                                                                                                     
of CDF (phi_s, DeltaGamma_s) likelihood profile, then                                                                                                     
run in a root session the following command:                                                                                                              

.L plot_cdf_confidence_regions.C                                                                                                                                       
plot_cdf_confidence_regions( isPhi, isCorrected, contLevel)                                                                                         
                                                                                                                                                          
where:                                                                                                                                                    
                                                                                                                                                          
'isPhi = true' to plot confidence regions with phi_s convention                                                                                           
'isPhi = false' to plot confidence regions with beta_s convention                                                                                         
                                                                                                                                                          
'isCorrected = true' to plot confidence regions with coveraged-correction included                                                                        
'isCorrected = false' to plot confidence regions without coveraged-correction included                                                                    
                                                                                                                                                          
'contLevel' is a double that sets the level of the 2DeltaLogL to draw the confidence regions.                                                             
                                                                                                                                                          
For instance to have the 68% C.L. confidence regions with phi_s, set contLevel to 2.3 with isCorrected=true:                                              
                                                                                                                                                          
plot_cdf_confidence_regions( true, true, 2.3)                                                                                                      
                                                                                                                                                          
                                                                                                                                                          
CDF Collaboration, April 18th 2012