diff --git a/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/SiSPSeededTrackFinderData/SiSpacePointForSeed.h b/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/SiSPSeededTrackFinderData/SiSpacePointForSeed.h
index 9fd2a0b6cfda74fc7506797dc98fffbe6f0d86ca..2879259be2492d4be9d26985d895d7c1a440a07a 100644
--- a/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/SiSPSeededTrackFinderData/SiSpacePointForSeed.h
+++ b/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/SiSPSeededTrackFinderData/SiSpacePointForSeed.h
@@ -46,6 +46,7 @@ namespace InDet {
void set(const Trk::SpacePoint*const&,const float*,const float*);
void setQuality(float);
void setParam(const float&);
+ void setScorePenalty(const float& par) {m_scorePenalty=par;}
const Trk::SpacePoint* spacepoint;
const float& x() const {return m_x;}
@@ -55,8 +56,9 @@ namespace InDet {
float phi() const {return atan2(m_y,m_x);}
const float& covr() const {return m_covr;}
const float& covz() const {return m_covz;}
- const float& param() const {return m_param;}
- const float& quality() const {return m_q ;}
+ const float& param() const {return m_param;} /// impact parameter
+ const float& scorePenalty() const {return m_scorePenalty;} /// penalty term in the seed score
+ const float& quality() const {return m_q ;} /// quality of the best seed this candidate was seen on
const Trk::Surface* sur() const {return m_su;}
const Trk::Surface* sun() const {return m_sn;}
@@ -68,8 +70,9 @@ namespace InDet {
float m_r ; // radius in beam system coordinates
float m_covr; //
float m_covz; //
- float m_param;
- float m_q ;
+ float m_param; /// impact parameter
+ float m_scorePenalty; /// penalty term in the seed score
+ float m_q ; /// quality of the best seed this candidate was seen on
const Trk::Surface* m_su;
const Trk::Surface* m_sn;
};
diff --git a/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/src/SiSpacePointsProSeed.cxx b/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/src/SiSpacePointsProSeed.cxx
index 4abe8730ade8aa0a20832578aea99e16e1ed27b4..4894433ae64f4ca0d6a5e8f560d0c61080edb2ea 100644
--- a/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/src/SiSpacePointsProSeed.cxx
+++ b/InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/src/SiSpacePointsProSeed.cxx
@@ -114,6 +114,7 @@ namespace InDet {
m_q = q;
bool pixb = !m_s0->spacepoint->clusterList().second;
bool pixt = !m_s2->spacepoint->clusterList().second;
+ /// if PPP or SSS, just update quality, don't cut
if(pixb==pixt) {
m_s0->setQuality(q);
m_s1->setQuality(q);
diff --git a/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/SiSpacePointsSeedTool_xk/SiSpacePointsSeedMaker_ATLxk.h b/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/SiSpacePointsSeedTool_xk/SiSpacePointsSeedMaker_ATLxk.h
index b20a86b919b1d086ffac3e6b781bbf3e66f1779f..adc213c8c9e3ad9cdbd30eb8e7ad3f0687607992 100644
--- a/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/SiSpacePointsSeedTool_xk/SiSpacePointsSeedMaker_ATLxk.h
+++ b/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/SiSpacePointsSeedTool_xk/SiSpacePointsSeedMaker_ATLxk.h
@@ -199,6 +199,11 @@ namespace InDet {
FloatProperty m_drmin{this, "mindRadius", 5.};
FloatProperty m_maxdImpact{this, "maxdImpact", 10.};
FloatProperty m_maxdImpactSSS{this, "maxdImpactSSS", 50.};
+ /// these flags allow to dynamically tighten the d0 cut on non-confirmed seeds based on
+ /// the penalty score they receive for kinking in the r-z plane.
+ /// The cut is adapted as cut_value = original - slope x penalty
+ FloatProperty m_dImpactCutSlopeUnconfirmedSSS{this, "dImpactCutSlopeUnconfirmedSSS", 1.0};
+ FloatProperty m_dImpactCutSlopeUnconfirmedPPP{this, "dImpactCutSlopeUnconfirmedPPP", 0.};
FloatProperty m_maxdImpactDecays{this, "maxdImpactForDecays", 20.};
FloatProperty m_ptmin{this, "pTmin", 500.};
//@}
@@ -246,6 +251,7 @@ namespace InDet {
float m_dzdrmax0{0.}; ///< implicitly store eta cut
float m_ipt{0.}; ///< inverse of 90% of the ptmin cut
float m_ipt2{0.}; ///< inverse square of 90% of the pt min cut
+ // static constexpr float m_COF{134*.05*9}; ///< appears to be an approximated term related to multiple-scattering of particles traversing the ID during the seed formation
static constexpr float m_COF{134*.05*9}; ///< appears to be an approximated term related to multiple-scattering of particles traversing the ID during the seed formation
/// @name Binning parameters
diff --git a/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/src/SiSpacePointsSeedMaker_ATLxk.cxx b/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/src/SiSpacePointsSeedMaker_ATLxk.cxx
index 9c5bbb9b71edb7559d742abeab5366d07499767e..5f097ebb3faed43f9d10ecb5d48e3486680ee718 100644
--- a/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/src/SiSpacePointsSeedMaker_ATLxk.cxx
+++ b/InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk/src/SiSpacePointsSeedMaker_ATLxk.cxx
@@ -1987,12 +1987,14 @@ void InDet::SiSpacePointsSeedMaker_ATLxk::production3Sp
/// evaluate distance the two closest-by SP in this seed candidate
float dr = data.R[b];
if (data.R[t] < data.R[b]) dr = data.R[t];
- /// update the d0 estimate
- d0+=std::abs((Tzb-data.Tz[t])/(dr*sTzb2));
+ /// obtain a quality score - start from the d0 estimate, and add
+ /// a penalty term corresponding to how far the seed segments
+ /// deviate from a straight line in r-z
+ data.SP[t]->setScorePenalty(std::abs((Tzb-data.Tz[t])/(dr*sTzb2)));
+ data.SP[t]->setParam(d0);
/// record one possible seed candidate, sort by the curvature
data.CmSp.emplace_back(std::make_pair(B/std::sqrt(onePlusAsquare), data.SP[t]));
/// store the transverse IP, will later be used as a quality estimator
- data.SP[t]->setParam(d0);
}
} ///< end loop over top space point candidates
@@ -2276,8 +2278,9 @@ void InDet::SiSpacePointsSeedMaker_ATLxk::newOneSeedWithCurvaturesComparison
for (; it_commonTopSP!=ie; ++it_commonTopSP) {
/// the seed quality is set to d0 initially
- float seedQuality = (*it_commonTopSP).second->param();
- float originalSeedQuality = (*it_commonTopSP).second->param();
+ float seedIP = (*it_commonTopSP).second->param();
+ float seedQuality = seedIP + (*it_commonTopSP).second->scorePenalty();
+ float originalSeedQuality = seedQuality;
if(m_maxdImpact > 50){ //This only applies to LRT
@@ -2288,7 +2291,7 @@ void InDet::SiSpacePointsSeedMaker_ATLxk::newOneSeedWithCurvaturesComparison
float eta1=-std::log(std::tan(.5*theta1));
float Zot=bottomZ - (bottomR-originalSeedQuality) * ((topZ-bottomZ)/(topR-bottomR));
- float theta0=std::atan2((*it_commonTopSP).second->param(),Zot);
+ float theta0=std::atan2(seedIP,Zot);
float eta0=-std::log(std::tan(.5*theta0));
float deltaEta=std::abs(eta1-eta0); //For LLP daughters, the direction of the track is correlated with the direction of the LLP (which is correlated with the direction of the point of closest approach
@@ -2353,16 +2356,21 @@ void InDet::SiSpacePointsSeedMaker_ATLxk::newOneSeedWithCurvaturesComparison
if (seedQuality > data.maxScore) continue;
/// if we have PPS seeds and no confirmation SP exists (which would give the -200 bonus)
- /// or the seed quality is worse than the quality of the individual SP, skip this seed
+ /// or the hits on this seed were already used on a higher quality PPP/SSS seed, kick this one
if (bottomSPisPixel!=topSPisPixel) {
if (seedQuality > 0. ||
(seedQuality > bottomSPQuality && seedQuality > centralSPQuality && seedQuality > (*it_commonTopSP).second->quality())
) continue;
}
- /// if we have a SSS seed, apply the d0 cut.
- /// Exception: If the SSS seed has a confirmation seed (-400 from SSS and -200 from confirmation),
- /// then we skip the d0 cut
- if (!bottomSPisPixel && (originalSeedQuality > m_maxdImpactSSS) && (seedQuality > m_seedScoreThresholdSSSConfirmationSeed)) continue;
+ /// If we have a non-confirmed seed, apply a stricter d0 cut.
+ /// This, is determined using the original cut and the score penalty modifier.
+ if (!isConfirmedSeed(SPb,it_commonTopSP->second,seedQuality)){
+ /// PPP seeds
+ double maxdImpact = m_maxdImpact - (m_dImpactCutSlopeUnconfirmedPPP * (*it_commonTopSP).second->scorePenalty());
+ /// SSS seeds
+ if (!bottomSPisPixel) maxdImpact = m_maxdImpactSSS - (m_dImpactCutSlopeUnconfirmedSSS * (*it_commonTopSP).second->scorePenalty());
+ if (seedIP > maxdImpact) continue;
+ }
/// this is a good seed, save it (unless we have too many seeds per SP)
newOneSeed(data, SPb, SP0, (*it_commonTopSP).second, Zob, seedQuality);
} ///< end of loop over top SP candidates
@@ -2394,7 +2402,7 @@ void InDet::SiSpacePointsSeedMaker_ATLxk::fillSeeds(EventData& data) const
theSeed = (*it_seedCandidate).second;
/// if this is not the highest-quality seed in the list and we have the first hit in the IBL, require a confirmation seed (score is then boosted by -200 for PPP + -200 for confirmation --> below -200)
if (it_seedCandidate!=it_firstSeedCandidate && theSeed->spacepoint0()->radius() < m_radiusCutIBL && quality > m_seedScoreThresholdPPPConfirmationSeed) continue;
- /// this will return false for strip seeds if the quality of the seed is worse than the one of all of the space points on the seed.
+ /// this will set the quality member of all points on the seed to the quality score of this candidate
if (!theSeed->setQuality(quality)) continue;
/// if we have space, write the seed directly into an existing slot