Add new decfiles for Bu2JpsiK, Bu2etaK, Bu2SigmaL0barPPbar decays

This is related to MR 1314, 1319, 1386, and 1428, with same gen-level cuts on tracks & Lambda0 polarization config.

The

$B^+\to J/\psi K^+,~B^+\to \eta_c K^+$

with

$J/\psi$

and

$\eta_c$

decay to

$\Sigma^0(\to \Lambda\gamma)pK$

,

$B^+\to \bar{\Sigma}^0p\bar{p}p$

decays are used to study the background of

$B^+\to \bar{\Lambda}phh$

analysis.

.dec files have been tested locally.

The included decays are listed here:

EventType	Decay
12105330	B+ -> (Sigma~0 -> (Lambda~0 -> p~- pi+) gamma) p+ p~- p+
12235002	B+ -> K+ (eta_c(2S) -> p+ (Lambda~0 -> p~- pi+) K-)
12135330	B+ -> K+ (J/psi(1S) -> p+ (Sigma~0 -> (Lambda~0 -> p~- pi+) gamma) K-)
12135331	B+ -> K+ (eta_c(1S) -> p+ (Sigma~0 -> (Lambda~0 -> p~- pi+) gamma) K-)
12135332	B+ -> K+ (eta_c(2S) -> p+ (Sigma~0 -> (Lambda~0 -> p~- pi+) gamma) K-)

cc @lsun.

assigned to @yitang

added 1 commit

• 0b89037d - TightCut -> DecProdCut, change EventType

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requested review from @fabudine and @emmuhamm

requested review from @kreps

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• 031b5ea2 - chage tuple.Decay

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mentioned in commit 4dbb9ff5

picked the changes into the branch cherry-pick-4dbb9ff5 with commit 65cb06a3

mentioned in commit 65cb06a3

mentioned in merge request !2151 (merged)