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Flag standalone V0s in the V0Index #12441

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13 changes: 12 additions & 1 deletion DataFormats/Reconstruction/include/ReconstructionDataFormats/DecayNBodyIndex.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,20 +36,31 @@ class DecayNBodyIndex
void setProngID(int i, GIndex gid) { mProngIDs[i] = gid; }
int getVertexID() const { return mVertexID; }
void setVertexID(int id) { mVertexID = id; }
uint8_t getBits() const { return mBits; }
bool testBit(int i) const { return (mBits & (0x1 << i)) != 0; }
void setBit(int i) { mBits |= (0x1 << i); }
void resetBit(int i) { mBits &= ~(0x1 << i); }

const std::array<GIndex, N>& getProngs() const { return mProngIDs; }
static constexpr int getNProngs() { return N; }

protected:
int mVertexID = -1; // id of parent vertex
std::array<GIndex, N> mProngIDs{}; // global IDs of prongs
ClassDefNV(DecayNBodyIndex, 1);
uint8_t mBits = 0; // user defined bits

ClassDefNV(DecayNBodyIndex, 2);
};

class V0Index : public DecayNBodyIndex<2>
{
public:
using DecayNBodyIndex<2>::DecayNBodyIndex;
V0Index(int v, GIndex p, GIndex n) : DecayNBodyIndex<2>(v, {p, n}) {}
bool isStandaloneV0() const { return testBit(0); }
bool isPhotonOnly() const { return testBit(1); }
void setStandaloneV0() { setBit(0); }
void setPhotonOnly() { setBit(1); }
ClassDefNV(V0Index, 1);
};

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11 changes: 9 additions & 2 deletions Detectors/Vertexing/src/SVertexer.cxx
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Expand Up @@ -663,9 +663,9 @@ bool SVertexer::checkV0(const TrackCand& seedP, const TrackCand& seedN, int iP,
// apply mass selections
float p2Pos = pP[0] * pP[0] + pP[1] * pP[1] + pP[2] * pP[2], p2Neg = pN[0] * pN[0] + pN[1] * pN[1] + pN[2] * pN[2];

bool goodHyp = false;
bool goodHyp = false, photonOnly = mSVParams->mTPCTrackPhotonTune && isTPConly;
std::array<bool, NHypV0> hypCheckStatus{};
int nPID = (mSVParams->mTPCTrackPhotonTune && isTPConly) ? (Photon + 1) : NHypV0;
int nPID = photonOnly ? (Photon + 1) : NHypV0;
for (int ipid = 0; (ipid < nPID) && mSVParams->checkV0Hypothesis; ipid++) {
if (mV0Hyps[ipid].check(p2Pos, p2Neg, p2V0, ptV0)) {
goodHyp = hypCheckStatus[ipid] = true;
Expand Down Expand Up @@ -855,6 +855,13 @@ bool SVertexer::checkV0(const TrackCand& seedP, const TrackCand& seedN, int iP,

if (nV0Used || !rejectIfNotCascade) { // need to add this v0
mV0sIdxTmp[ithread].push_back(v0Idxnew);
if (!rejectIfNotCascade) {
mV0sIdxTmp[ithread].back().setStandaloneV0();
}
if (photonOnly) {
mV0sIdxTmp[ithread].back().setPhotonOnly();
}

if (mSVParams->createFullV0s) {
mV0sTmp[ithread].push_back(v0new);
}
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