SiStripTemplateReco Namespace Reference

Functions
int	StripTempReco1D (int id, float cotalpha, float cotbeta, float locBy, std::vector< float > &cluster, SiStripTemplate &templ, float &xrec, float &sigmax, float &probx, int &qbin, int speed, float &probQ)

Function Documentation

int SiStripTemplateReco::StripTempReco1D	(	int	id,
		float	cotalpha,
		float	cotbeta,
		float	locBy,
		std::vector< float > &	cluster,
		SiStripTemplate &	templ,
		float &	xrec,
		float &	sigmax,
		float &	probx,
		int &	qbin,
		int	speed,
		float &	probQ
	)

Reconstruct the best estimate of the hit position for strip clusters, includes autoswitching to barycenter when that technique is more accurate.

Parameters

id	- (input) identifier of the template to use
cotalpha	- (input) the cotangent of the alpha track angle (see CMS IN 2004/014)
cotbeta	- (input) the cotangent of the beta track angle (see CMS IN 2004/014)
locBy	- (input) the sign of the local B_y field to specify the Lorentz drift direction
cluster	- (input) boost multi_array container array of 13 pixel signals, origin of local coords (0,0) at center of pixel cluster[0].
templ	- (input) the template used in the reconstruction
xrec	- (output) best estimate of x-coordinate of hit in microns
sigmax	- (output) best estimate of uncertainty on xrec in microns
probx	- (output) probability describing goodness-of-fit for x-reco
qbin	- (output) index (0-4) describing the charge of the cluster qbin = 0 Q/Q_avg > 1.5 [few % of all hits] 1 1.5 > Q/Q_avg > 1.0 [~30% of all hits] 2 1.0 > Q/Q_avg > 0.85 [~30% of all hits] 3 0.85 > Q/Q_avg > min1 [~30% of all hits] 4 min1 > Q/Q_avg > min2 [~0.1% of all hits] 5 min2 > Q/Q_avg [~0.1% of all hits]
speed	- (input) switch (-2->5) trading speed vs robustness -2 totally bombproof, searches the entire 41 bin range at full density (equiv to V2_4), calculates Q probability w/ VVIObj (better but slower) -1 totally bombproof, searches the entire 41 bin range at full density (equiv to V2_4), calculates Q probability w/ TMath::VavilovI (poorer but faster) 0 totally bombproof, searches the entire 41 bin range at full density (equiv to V2_4) 1 faster, searches reduced 25 bin range (no big pix) + 33 bins (big pix at ends) at full density 2 faster yet, searches same range as 1 but at 1/2 density 3 fastest, searches same range as 1 but at 1/4 density (no big pix) and 1/2 density (big pix in cluster) 4 fastest w/ Q prob, searches same range as 1 but at 1/4 density (no big pix) and 1/2 density (big pix in cluster), calculates Q probability w/ VVIObj (better but slower) 5 fastest w/ Q prob, searches same range as 1 but at 1/4 density (no big pix) and 1/2 density (big pix in cluster), calculates Q probability w/ TMath::VavilovI (poorer but faster)
probQ	- (output) the Vavilov-distribution-based cluster charge probability

Definition at line 84 of file SiStripTemplateReco.cc.