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Bugfix for BdsToKSKS Downstream lines

Lorenzo Pica requested to merge bds_ksks_down_bugfix into bnoc_run3

This fixes a bug introduced in the May deadline MR (!3471 (merged)) for LLDD and DDDD BdsToKSKS lines.

B mesons invariant mass thresholds (4900 MeV < m < 5700 MeV) have been incorrectly applied to Downstream Ks. This results in a (almost) complete candidates rejection for (LLDD) DDDD lines.

This has been spotted looking at the monitoring plots provided by RTA for pre-TS runs where UT was included in datataking. Invariant mass plots for LLLL, LLDD, DDDD lines are attached.

BdsToKSKS_DDDD

BdsToKSKS_LLDD

BdsToKSKS_LLLL

BW estimate of three lines together is 6.4 MB/s.

Rate estimate is:

  • LLLL 1 Hz (2 MB/s)
  • LLDD 2.3 Hz (4.5 MB/s)
  • DDDD <1 Hz (< 2 MB/s)

FYI @msaur @fswystun @duliu

Edited by Lorenzo Pica

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