S. Ordonez-Soto  

 

B2KShh' \(\mu\)-group Meeting

 

May 5th 2025

 

Search for Bs2KSKK and updated BF measurements of B2KShh' using Run 1+2 data

Overview

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

  • Previous presentation (18/04/2025) 
    • I presented the average efficiencies after the ProbNNp < 0.5 cut for KK
      • Unexpected increase with respect to the current version of the ANAnote 

Why?

  • After some checks (see back up), I noticed that the efficiencies in the ANAnote already take into account this cut
    • Current ANanote efficiencies: Previous sWeights + ProbNNp<0.5 cut for KK
      • Tristan added the current tables on 18/07/2024
    • One should compare instead with this ANAnote version (v4 27/06/2024).

Results before and after the PROBNNp < 0.5 cut for KK

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

Before (Table 69 ANAnote v4)

After

Average efficiencies

Sebastian Ordoñez-Soto

Results before and after the PROBNNp < 0.5 cut for KK

After

Before (Table 40 ANAnote v4)

May 2025

B2KShh' BF analysis/Eff determination

Average efficiencies

Results before and after the PROBNNp < 0.5 cut for KK

Sebastian Ordoñez-Soto

After

Before (Table 90 ANAnote v4)

May 2025

B2KShh' BF analysis/Eff determination

Ratio of efficiencies

Sebastian Ordoñez-Soto

Results before and after the PROBNNp < 0.5 cut for KK

After

Before (Table 86 ANAnote v4)

May 2025

B2KShh' BF analysis/Eff determination

Ratio of efficiencies

Summary

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

  • The issue reported in the last presentation was a matter of a comparison with the wrong version of the efficiency tables
  • A comparison with the correct version aligns well with the expected results for the KK mode:
    • An almost negligible change of O(~2%) for Run 1 datasets
    • A significant impact of O(~30%) for Run 2 samples

Why?

  • On the efficiency side, it is okay to go ahead with the final combination

Back up

Checks

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

  • First check: Run efficiency machinery with PROBNNp < 0.9 cut for all modes

Table 69 ANAnote v4

My check

Checks

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

Table 65 ANAnote v4

My check

  • First check: Run efficiency machinery with PROBNNp < 0.9 cut for all modes

Checks

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

  • Second check: Run efficiency machinery with PROBNNp <0.5 cut for KK + previous sWeights

Table 69 ANAnote current

My check

Checks

Sebastian Ordoñez-Soto

May 2025

B2KShh' BF analysis/Eff determination

Table 65 ANAnote current

My check

  • Second check: Run efficiency machinery with PROBNNp <0.5 cut for KK + previous sWeights