From e712d815936255c151567aea22f5cb3986bc7cf4 Mon Sep 17 00:00:00 2001 From: ekman Date: Fri, 2 Jun 2006 06:44:59 +0000 Subject: [PATCH] changed calculation of n_sigma to vertex (again...). --- PWG0/esdTrackCuts/AliESDtrackCuts.cxx | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/PWG0/esdTrackCuts/AliESDtrackCuts.cxx b/PWG0/esdTrackCuts/AliESDtrackCuts.cxx index a63421f2341..4b1fe182caf 100644 --- a/PWG0/esdTrackCuts/AliESDtrackCuts.cxx +++ b/PWG0/esdTrackCuts/AliESDtrackCuts.cxx @@ -297,10 +297,13 @@ AliESDtrackCuts::AcceptTrack(AliESDtrack* esdTrack) { // It means that for a 2-dim gauss: n_sigma(d) = Sqrt(2)*ErfInv(1 - Exp((-x**2)/2) // Can this be expressed in a different way? // + // + // FIX: I don't think this is correct!!! Keeping d as n_sigma for now... + Float_t nSigmaToVertex = -1; if (bRes[0]!=0 && bRes[1]!=0) { Float_t d = TMath::Sqrt(TMath::Power(b[0]/bRes[0],2) + TMath::Power(b[1]/bRes[1],2)); - nSigmaToVertex = TMath::Sqrt(2)*(TMath::ErfInverse(1 - TMath::Exp(0.5*(-d*d)))); + nSigmaToVertex = d;//TMath::Sqrt(2)*(TMath::ErfInverse(1 - TMath::Exp(0.5*(-d*d)))); } // getting the kinematic variables of the track -- 2.39.3