From df9cb671a0828bd2182aaabf4be9203f0592b4f9 Mon Sep 17 00:00:00 2001 From: tlatorre Date: Sun, 23 Jun 2019 17:11:21 -0500 Subject: update how neck events are flagged This commit updates the is_neck_event() function to include the requirement that 50% of the normal PMTs in the event must have z <= -425.0. --- src/dc.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/dc.h') diff --git a/src/dc.h b/src/dc.h index f613b93..102e47f 100644 --- a/src/dc.h +++ b/src/dc.h @@ -33,6 +33,12 @@ #define DC_OWL_TRIGGER 0x100 #define DC_FTS 0x200 +/* Height of PMTs which are considered to be at the "bottom" of the detector + * for the neck cut. Comes from the SNOOP definition of a neck event in SNO. */ +#define NECK_BOTTOM_HEIGHT -425.0 +/* Fraction of normal PMT hits which must be below NECK_BOTTOM_HEIGHT. */ +#define NECK_BOTTOM_FRACTION 0.5 + /* Delta-t threshold for PMT pairs in the FTS cut (ns). */ #define FTS_DT_THRESH 25.0 /* Distance threshold for PMT pairs in the FTS cut (cm). */ -- cgit