“…This is due to the fact that the dataset needed to measure P (L1, L2, offl | L1, offl) and P (L1, offl | offl) has very limited statistics. Since the L3 to offline tracking efficiency is nearly 100% [151], the two numbers should be nearly identical. As a cross-check, L1 trigger efficiency was measured using both methods and the results are consistent within statistical uncertainty.…”