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[PWGCF] FemtoUniverse: Fix the weight factor in femto region for MC Truth #14583

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Merged
prchakra merged 6 commits into from
Jan 22, 2026
+4 −2
Merged

[PWGCF] FemtoUniverse: Fix the weight factor in femto region for MC Truth #14583

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0316181
Correct the PRF factor of momentum in phase
alibuild Jan 22, 2026
f8007d0
Boost the space part of phase to PRF
alibuild Jan 22, 2026
1bcf9e0
Fix clang-format errors
prchakra Jan 22, 2026
e094eb9
Fix build error
prchakra Jan 22, 2026
96db07b
Fix clang-format error
prchakra Jan 22, 2026
491ea76
Remove unused variable
prchakra Jan 22, 2026
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6 changes: 4 additions & 2 deletions PWGCF/FemtoUniverse/Core/FemtoUniverseMath.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@

#include "Math/Boost.h"
#include "Math/Vector4D.h"
#include "TLorentzVector.h"

Check failure on line 24 in PWGCF/FemtoUniverse/Core/FemtoUniverseMath.h

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[root/lorentz-vector] 

Do not use the TLorentzVector legacy class. Use std::array with RecoDecay methods or the ROOT::Math::LorentzVector template instead.
#include "TMath.h"

#include <algorithm>
Expand Down Expand Up @@ -225,7 +225,6 @@
const double fDKOutLCMS = px1LCMS - px2LCMS;
const double fDKSideLCMS = py1LCMS - py2LCMS;
const double fDKLongLCMS = pz1LCMS - pz2LCMS;
const double mDE = pE1LCMS - pE2LCMS;

// Boost to PRF

Expand Down Expand Up @@ -269,8 +268,11 @@
const double mRS = (y1_lcms - y2_lcms) / 0.197327;
const double mRL = (z1_lcms - z2_lcms) / 0.197327;
const double mDT = (t1_lcms - t2_lcms) / 0.197327;
const double rOutPRF = gammaOut * (mRO - betaOut * mDT);

const double phase_inv = fDKOutPRF * rOutPRF + fDKSidePRF * mRS + fDKLongPRF * mRL;
double quantumweight = 1.0 + TMath::Cos(2.0 * phase_inv);

const double quantumweight = 1.0 + std::cos(-fDKOutLCMS * mRO - fDKSideLCMS * mRS - fDKLongLCMS * mRL + mDE * mDT);
vect.push_back(quantumweight);
} else {
vect.push_back(1.0);
Expand Down
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