B-physics trigger: add additional selection for the close-by electron in R(K*) bBeeM6000 chains (ATR-28162)
This MR will reduce the rate of the following bBeeM6000 chains, needed for R(K*) analysis:
- HLT_e5_lhvloose_bBeeM6000_L1BKeePrimary (rate from 115Hz -> ~40Hz, 65% reduction)
- HLT_e5_lhvloose_bBeeM6000_L1BKeePrescaled (rate from 1.4Hz -> 0.4Hz, 70% reduction)
The close-by electron should pass the same ET requirement as HLT_e5_lhvloose. This will harmonize the HLT dielectron selection and subsequent offline analysis.