Reduce the double-charm line rates in bandq area

Update: rate significantly reduced in !1591 (merged) .

The next task is to update the single-charm builders. It is just a temporary solution to use prod_xsec module from charm, which will be changed later after the EMTF period. A more stable solution is needed for future.

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The rate of double-charm lines in bandq is found to be very high, as shown in the description of !1225 (merged) .

Need to optimize the selection to control the rate.

The first check is to have a comparison with Hlt2Charm_DoubleOpenCharmOS_PR_XSec_Line selections in the charm WG.

Rates below are obtained using MB MC sample after hlt1 filtering:

Charm version:

Hlt2Charm_DoubleOpenCharmOS_PR_XSec_Line                           #=14983   Sum=11   Eff=|(0.07341654 +- 0.0221278)%|
Hlt2Charm_DoubleOpenCharmSS_PR_XSec_Line                           #=14983   Sum=4    Eff=|(0.02669692 +- 0.0133467)%|

BandQ version:

Hlt2BandQ_DoubleCharmOppositeSignLineDecisionWithOutput    #=50000   Sum=808         Eff=|( 1.616000 +- 0.0563895)%|
Hlt2BandQ_DoubleCharmSameSignLineDecisionWithOutput        #=50000   Sum=853         Eff=|( 1.706000 +- 0.0579119)%|

Combiners for charm line:

[psi(4415) -> D0 D+]cc
[psi(4415) -> D0 D0]cc
[psi(4415) -> D0 D_s+]cc
[psi(4415) -> D0 Lambda_c+]cc
[psi(4415) -> D+ D+]cc
[psi(4415) -> D+ D_s+]cc
[psi(4415) -> D+ Lambda_c+]cc
[psi(4415) -> D_s+ D_s+]cc
[psi(4415) -> D_s+ Lambda_c+]cc
[psi(4415) -> Lambda_c+ Lambda_c+]cc

Combiners for bandq line:

            '[psi(3770) -> D0 D0]cc', '[psi(3770) -> D0 D+]cc',
            '[psi(3770) -> D0 D_s+]cc', '[psi(3770) -> D0 Lambda_c+]cc',
            '[psi(3770) -> D0 Xi_c0]cc', '[psi(3770) -> D0 Omega_c0]cc',
            '[psi(3770) -> D+ D+]cc', '[psi(3770) -> D+ D_s+]cc',
            '[psi(3770) -> D+ Lambda_c+]cc', '[psi(3770) -> D+ Xi_c0]cc',
            '[psi(3770) -> D+ Omega_c0]cc', '[psi(3770) -> D_s+ D_s+]cc',
            '[psi(3770) -> D_s+ Lambda_c+]cc', '[psi(3770) -> D_s+ Xi_c0]cc',
            '[psi(3770) -> D_s+ Omega_c0]cc',
            '[psi(3770) -> Lambda_c+ Lambda_c+]cc',
            '[psi(3770) -> Lambda_c+ Xi_c0]cc',
            '[psi(3770) -> Lambda_c+ Omega_c0]cc',
            '[psi(3770) -> Xi_c0 Xi_c0]cc', '[psi(3770) -> Xi_c0 Omega_c0]cc',
            '[psi(3770) -> Omega_c0 Omega_c0]cc'