Charm HLT2 lines: DpToKSh

Prototype of DpToKSh lines, where h = K/pi and KS is reconstructed in separate lines as LL and DD. Dp and Ds are both included within a broad mass window.

This implementation mainly follows Run2 selection from the dedicated Turbo lines.

TO DO:

• is explicit GEC filtering needed?
• tune selection cuts based on dedicated MC sample

Efficiency test based on the available Hlt1 filtered sample: Based on 14983 evts

Hlt2Charm_DpToKsKp_DD #=14983 Sum=1 Eff=|(0.006674231 +- 0.00667401)%|
Hlt2Charm_DpToKsKp_LD #=14983 Sum=0 Eff=|( 0.000000 +- 0.00000 )%|
Hlt2Charm_DpToKsKp_LL #=14983 Sum=4 Eff=|(0.02669692 +- 0.0133467)%|
Hlt2Charm_DpToKsPip_DD #=14983 Sum=2 Eff=|(0.01334846 +- 0.00943816)%|
Hlt2Charm_DpToKsPip_LD #=14983 Sum=0 Eff=|( 0.000000 +- 0.00000 )%|
Hlt2Charm_DpToKsPip_LL #=14983 Sum=5 Eff=|(0.03337115 +- 0.0149215)%|

Relevant rates:

Hlt2Charm_DpToKsKp_DD #=14983 ~ 67 Hz
Hlt2Charm_DpToKsKp_LD #=14983 ~ 0 Hz
Hlt2Charm_DpToKsKp_LL #=14983 ~ 267 Hz
Hlt2Charm_DpToKsPip_DD #=14983 ~ 133 Hz
Hlt2Charm_DpToKsPip_LD #=14983 ~ 0 Hz
Hlt2Charm_DpToKsPip_LL #=14983 ~ 334 Hz

FYI @ziyiw

added Charm hlt2 selection labels

requested review from @mstahl and @jingyi

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• c663f89c - correcting typo in CODEOWNERS

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assigned to @msaur

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• b2a758bc - correct probnn

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• 4f694b1a - adding IPCHI2 cut for KS0
• 997ed721 - tuning IPCHI2 cut for KS0

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• 352e89e1 - Fixed formatting

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Hi @mstahl @jingyi , I have added some IPCHI2 cuts on KS0 to reduce background and with that this MR is ready from my side.

Would you have some additional comments or can I pass it to shofter?

added RTA label

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• a3dd5d2e - switched to PID, removed IPCHI2 cut on KS

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• 0c0cf146 - commenting out BPVIPCHI2 for KS

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• 1a8f2f1e - removing pvs from KS_DD

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added 200 commits

• 1a8f2f1e...97650bb6 - 187 commits from branch master
• 3d105e49 - prototype of DpToKSh HLT2 lines
• 58c50e65 - removing unused imports
• 0b6a9b4b - formatting
• 2a518c0f - formatting
• 7392f4d3 - removed unused import
• 275c7e3a - correcting typo in CODEOWNERS
• 996fc33b - correct probnn
• 29cc666d - adding IPCHI2 cut for KS0
• c04e9dec - tuning IPCHI2 cut for KS0
• 879df462 - Fixed formatting
• 88c61d87 - switched to PID, removed IPCHI2 cut on KS
• a5c70d39 - commenting out BPVIPCHI2 for KS
• 44d0e377 - removing pvs from KS_DD

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Thanks for adding this Mirsolav. In addition to these signal modes, won't we need a (prescaled) downstream+long line as well? I remember that we used them in the past as a way to cross-check the tracking/vertexing efficiency, also as part of studies in charm analyses.

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• cfe79876 - tuning cuts

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added 2 commits

• 5d619325 - added LD lines, still too high rate for D2KSKp_LL
• e38cc469 - added name parameter to all final combiners

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changed the description

added 59 commits

• e38cc469...1734124d - 44 commits from branch master
• 222bfd75 - prototype of DpToKSh HLT2 lines
• 56b6e437 - removing unused imports
• 0b85adac - formatting
• c20a40b4 - formatting
• c7873a1e - removed unused import
• 31c85610 - correct probnn
• 74878db1 - adding IPCHI2 cut for KS0
• 33b47486 - tuning IPCHI2 cut for KS0
• dd3e0c71 - Fixed formatting
• b6b434cd - switched to PID, removed IPCHI2 cut on KS
• 7c21aab9 - commenting out BPVIPCHI2 for KS
• e1d51268 - removing pvs from KS_DD
• f6d4a111 - tuning cuts
• 4469442c - added LD lines, still too high rate for D2KSKp_LL
• f6a7c94a - added name parameter to all final combiners

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• de04215a - applying comments, added DtoKS vertex cut

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• e2196e3b - fixing here and there...

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Hi @mstahl and @ldufour, I have pushed the latest version and updated all the rates. They look reasonable to me especially when taken into account that both D+ and Ds+ is selected by each line. Any additional ideas are very welcome.

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• bc5eb4e8 - applying comments, removing unused down kp, naming convention

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• f09aa5d4 - removing unused import

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changed target branch from master to charm-thor-hlt2-lines

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• f09aa5d4...08beeb6d - 135 commits from branch charm-thor-hlt2-lines
• e589a811 - Merge branch 'charm-thor-hlt2-lines' into 'msaur_DpToKSh'

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• 299bd81e - resolving conflicts

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• 72b64272 - correct naming scheme, corrected comments

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approved this merge request