Adding file for B+_JpsimmmmK

Emilio Xose Rodriguez Fernandezrequested to merge
emrodrig/my-changes into master

Adding B+ -> (Jpsi-> mu+ mu- mu+ mu-) K+ decay mode for background estimations for Multimuons analysis in Run2. Decay mode used: pure PHSP

Edited by Emilio Xose Rodriguez Fernandez

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