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Add a storeEProt toggle to the 3D qn THnSparse in FemtoDreamContainer and femtoDreamPairTaskTrackTrack. When enabled, the out/side/long momentum-difference axes are replaced by DK_x, DK_y, DK_z rotated into the event-plane (magnetic-field) frame, so DK_y is out-of-plane (||B) for every pair. A single-component cut (e.g. on DK_x, DK_z) is applied offline on the output; this toggle only changes what is histogrammed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
ootaku303
requested review from
alibuild,
ariedel-cern,
dimihayl,
dsarkaralice,
lauraser,
victor-gonzalez and
wrzesaCERN
as code owners
October 1, 2026 11:11
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Add an optional storeEProt toggle to the 3D qn THnSparse in femto-dream-pair-task-track-track. When enabled, the out/side/long momentum-difference axes are replaced by DK_x, DK_y, DK_z rotated into the event-plane (B-field) frame, so DK_y is out-of-plane (||B) for every pair — useful for offline single-component cuts when searching for B-direction-dependent HBT modulation.
Default is false: booking and output are unchanged. Tested: builds clean against latest master, and a full 1-file run with storeEProt=true produces the expected relPair3dEProtRmTMultPercentileQnPairphi histogram (SameEvent 1.4×10⁸ / MixedEvent 2.5×10⁷ entries) with no change when the toggle is off.