TrackerL1 Namespace Reference

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Functions
bool	HasL1XYHit (const TH2D *hTrackerL1_XY, const double &x, const double &y, const bool &debug=false)
std::pair< Point::Point2DwID, bool >	FindClosestTrkL1ClusterFrom3DLine (const TH2D *hTrackerL1_XY, const Line::Line3DParametricForm &line, const std::vector< Point::Point2DwID > &gMCClustersXY, const bool &debug=false)

Detailed Description

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Function Documentation

FindClosestTrkL1ClusterFrom3DLine()

std::pair<Point::Point2DwID, bool> TrackerL1::FindClosestTrkL1ClusterFrom3DLine	(	const TH2D *	hTrackerL1_XY,
		const Line::Line3DParametricForm &	line,
		const std::vector< Point::Point2DwID > &	gMCClustersXY,
		const bool &	debug = false
	)

Validate the function inputs

Step 1: Solve for t given the target Z

Step 2: Find extrapolated X and Y using t

Step 3: Check if L1 hit exists. If not, return empty pair

Step 4: Find the closest gMCCluster

init a very high value

x1, y1, x2, y2

reset to the smaller value

Step 5: Return the closest gMCCluster 0.01cm is 100um (micron) (AMS tracker resolution is ~1um). using a cut of less 0.1cm seems justified. the distribution really changes at that stage. there is another change in slope at 200um.

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HasL1XYHit()

bool TrackerL1::HasL1XYHit	(	const TH2D *	hTrackerL1_XY,
		const double &	x,
		const double &	y,
		const bool &	debug = false
	)

Get the bin indexes for the point

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