B2OC: selections of b_to_ddh decays

Completed work on this in !3035 (merged)

This is a follow-up of !2945 (merged) and !2902 (merged) that were already merged into b2oc_upgrade and, subsequently, master

The selection code in b_to_ddh_standalone.py needs to be simplified, including:

• determine a plan to remove redundant lines, currently lines that select Kpi OR K3pi and HH OR HHHH are still in the list of lines, however these should be removed --- perhaps this should just be done unilaterally but perhaps we should contact proponents. More details below.
• move several lines from b_to_ddh_standalone to b_to_ddh
  • Thought these might be lines that do not need sep_min cuts or kwargs . However Alessandro made a comment that regarding sep_min we will have to look here: https://gitlab.cern.ch/lhcb/Moore/-/blob/b2oc_upgrade/Hlt/Hlt2Conf/python/Hlt2Conf/lines/b_to_open_charm/builders/b_builder.py#L28-L43
• remove redundant D0 mass cuts
• In principle BdToD0D0KsDD,BdToD0D0KsLL, and BdToD0D0Phi could be added to the flavour tagging section of the relevant _b2oc.py file... is this something we want to do? It might be useful to know the B meson flavour for amplitude analyses, but then again suppose it may be possible to add their amplitudes (Haven't fully thought this through, the two flavours should not interfere since you could in-principle flavour tag)

These need to be done before the B2OC deadline Feb. 22nd.

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Details about redundant lines

• BdToD0D0

  • Proponents originally selected D0 to {HH or HHHH} vs D0 to {HH or HHHH}
  • Candidate to replace: Three separate lines: D0 to HH, D0 to HH vs D0 to HHHH, and D0 to HHHH (already installed)
    • The retention ratio for these three lines together compared to the single line is 306/285 = 107.37% +/- ?

• BdToD0D0Kst

  • Proponents originally selected D0 to {HH or HHHH} vs D0 to {HH or HHHH}
  • Candidate to replace: three separate lines: D0 to HH, D0 to HH vs D0 to HHHH, and D0 to HHHH (already installed)
    • The retention ratio for these three lines together compared to the single line is 13/10 = 130% +/- ?

• BdToD0D0KsDD

• BdToD0D0KsLL

• BdToD0D0Phi

• LbToD0D0LambdaDD

• LbToD0D0LambdaLL

• only a _D0ToKPiOrKPiPiPi(process) existed for these lines before MR !2945 (merged).

  • Candidate to replace: Three separate lines: D0 to HH, D0 to HH vs D0 to HHHH, and D0 to HHHH (already installed)

• BuToD0D0K

• BuToD0D0Pi

• in MR !2945 (merged) D0ToKPiOrKPiPiPi lines were removed from BuToD0D0Pi and BuToD0D0K and replaced with {D0ToKPi,D0ToKPiPiPi,D0ToKPi_D0ToKPiPiPi}

  • Candidate to replace: Three separate lines: D0 to HH, D0 to HH vs D0 to HHHH, and D0 to HHHH (already installed)

• BuToDst0D0K

• only a _D0ToKPiOrKPiPiPi_D0ToKPiOrKPiPiPi(process) existed for these lines before this MR.

  • Candidate to replace: Four separate lines: (already installed)
    • D0fromDst to HH vs D0 to HH (1 line)
    • D0fromDst to HH vs D0 to HHHH (and vice versa, so 2 lines)
    • D0fromDst to HHHH vs D0 to HHHH (1 line)