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test zPointed selection fix in PPBB #216

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test zPointed selection fix in PPBB #216

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6 changes: 2 additions & 4 deletions RecoTracker/LSTCore/src/alpaka/PixelTriplet.h
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Original file line number Diff line number Diff line change
Expand Up @@ -923,20 +923,18 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE::lst {
const float muls2 = thetaMuls2 * 9.f / (ptCut * ptCut) * 16.f;

float dzErr = (drt_OutLo_InUp * drt_OutLo_InUp) * (etaErr * etaErr) * cosh2Eta;
dzErr += 0.03f * 0.03f; // Approximately account for IT module size
dzErr *= 9.f; // 3 sigma
dzErr += muls2 * (drt_OutLo_InUp * drt_OutLo_InUp) / 3.f * cosh2Eta;
dzErr += zGeom * zGeom;
dzErr = alpaka::math::sqrt(acc, dzErr);

const float dzDrIn = pz / ptIn;
const float zWindow = dzErr / drt_InSeg * drt_OutLo_InUp + zGeom;
const float dzMean = dzDrIn * drt_OutLo_InUp *
(1.f + drt_OutLo_InUp * drt_OutLo_InUp * 4 * k2Rinv1GeVf * k2Rinv1GeVf / ptIn / ptIn /
24.f); // with curved path correction
// Constructing upper and lower bound
zLoPointed = z_InUp + dzMean - zWindow;
zHiPointed = z_InUp + dzMean + zWindow;
zLoPointed = z_InUp + dzMean - dzErr;
zHiPointed = z_InUp + dzMean + dzErr;

if ((z_OutLo < zLoPointed) || (z_OutLo > zHiPointed))
return false;
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