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[Sphenix-tracking-l] Out of time hits in MVTX and INTT

From: Anthony Frawley <afrawley AT fsu.edu>
To: "sphenix-tracking-l AT lists.bnl.gov" <sphenix-tracking-l AT lists.bnl.gov>
Subject: [Sphenix-tracking-l] Out of time hits in MVTX and INTT
Date: Mon, 30 Aug 2021 20:54:58 +0000

Hi All,

I am following up on the discussion about track associated clusters in the tracking software meeting this morning.

Christof showed a plot of the fraction of clusters in each layer that was associated with a track (made using truth tracking). We were surprised that the fraction was similar for the MVTX and INTT in pileup events, because of the difference in time window for the two subsystems.

I agreed to check that the time window was implemented for both systems. It is. Both PHG4InttHitReco and PHG4MvtxHitReco have time cuts on the g4 hits.

MVTX: -5000 ns < t < + 5000 ns

INTT: -20 ns < t < +80 ns

The g4 hit is skipped and not reconstructed if it is outside these windows.

Are we just not thinking about this the right way?

Tony

[Sphenix-tracking-l] Out of time hits in MVTX and INTT, Anthony Frawley, 08/30/2021