add dkfile 15998001
See merge request !1862 (merged)
(cherry picked from commit 569f5127)
30cdc6d0 add dkfile 15998001 5f53b474 add updated 15998001: replace tight cuts with LHCbAcceptance; remove MyParticles alias 317146ed correct the dkfile 15998001 name 515c1ad7 add .dec to the file name