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[PWGLF] Local polarization of Lambda induced by jets in Run3 pp collisions at 13.6 TeV #13341

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romainschotter merged 1 commit into from
Oct 12, 2025
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[PWGLF] Local polarization of Lambda induced by jets in Run3 pp collisions at 13.6 TeV #13341

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79 changes: 72 additions & 7 deletions PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@
#include <fastjet/tools/Subtractor.hh>

#include <cmath>
#include <iostream>

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[include-iostream] 

Do not include iostream. Use O2 logging instead.
#include <string>
#include <vector>

Expand Down Expand Up @@ -245,8 +245,8 @@
registryData.add("LambdaPtMass", "LambdaPtMass", HistType::kTH2F, {ptAxis, invMassLambdaAxis});
registryData.add("AntiLambdaPtMass", "AntiLambdaPtMass", HistType::kTH2F, {ptAxis, invMassLambdaAxis});

registryData.add("hMassLambda", "hMassLambda", {HistType::kTH1F, {{200, 0.9f, 1.2f}}});
registryData.add("hMassAntiLambda", "hMassAntiLambda", {HistType::kTH1F, {{200, 0.9f, 1.2f}}});
registryData.add("hMassLambda", "hMassLambda", {HistType::kTH1F, {{invMassLambdaAxis}}});
registryData.add("hMassAntiLambda", "hMassAntiLambda", {HistType::kTH1F, {{invMassLambdaAxis}}});
registryData.add("V0pTInLab", "V0pTInLab", kTH1F, {axisPT});

registryData.add("V0pxInLab", "V0pxInLab", kTH1F, {axisPx});
Expand All @@ -267,6 +267,11 @@
registryData.add("protonQA/profileprotonsinthetaInLab", "Invariant Mass vs sin(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotonsinphiInLab", "Invariant Mass vs sin(phi)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotoncosSquarethetaInLab", "Invariant Mass vs cos^2(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("JetQA/JetthetaInLab", "JetthetaInLab", kTH1F, {axisTheta});
registryData.add("JetQA/JetphiInLab", "JetphiInLab", kTH1F, {axisPhi});
registryData.add("JetQA/JetpxInLab", "JetpxInLab", kTH1F, {axisPx});
registryData.add("JetQA/JetpyInLab", "JetpyInLab", kTH1F, {axisPy});
registryData.add("JetQA/JetpzInLab", "JetpzInLab", kTH1F, {axisPz});

registryData.add("protonQA/V0protonpxInRest_frame", "V0protonpxInRest_frame", kTH1F, {axisPx});
registryData.add("protonQA/V0protonpyInRest_frame", "V0protonpyInRest_frame", kTH1F, {axisPy});
Expand All @@ -278,6 +283,11 @@
registryData.add("protonQA/profileprotonsinthetaInV0frame", "Invariant Mass vs sin(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotonsinphiInV0frame", "Invariant Mass vs sin(phi)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotoncosSquarethetaInV0frame", "Invariant Mass vs cos^2(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("JetQA/JetthetaInV0", "JetthetaInV0", kTH1F, {axisTheta});
registryData.add("JetQA/JetphiInV0", "JetphiInV0", kTH1F, {axisPhi});
registryData.add("JetQA/JetpxInV0", "JetpxInV0", kTH1F, {axisPx});
registryData.add("JetQA/JetpyInV0", "JetpyInV0", kTH1F, {axisPy});
registryData.add("JetQA/JetpzInV0", "JetpzInV0", kTH1F, {axisPz});

registryData.add("protonQA/V0protonpxInJetframe", "V0protonpxInJetframe", kTH1F, {axisPx});
registryData.add("protonQA/V0protonpyInJetframe", "V0protonpyInJetframe", kTH1F, {axisPy});
Expand All @@ -289,6 +299,11 @@
registryData.add("protonQA/profileprotonsinphiInJetframe", "Invariant Mass vs sin(phi)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotoncosSquarethetaInJetframe", "Invariant Mass vs cos^2(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/V0protonMassInJetframe", "V0protonMassInJetframe", kTH1F, {axisMass});
registryData.add("JetQA/JetthetaInJetframe", "JetthetaInJetframe", kTH1F, {axisTheta});
registryData.add("JetQA/JetphiInJetframe", "JetphiInJetframe", kTH1F, {axisPhi});
registryData.add("JetQA/JetpxInJetframe", "JetpxInJetframe", kTH1F, {axisPx});
registryData.add("JetQA/JetpyInJetframe", "JetpyInJetframe", kTH1F, {axisPy});
registryData.add("JetQA/JetpzInJetframe", "JetpzInJetframe", kTH1F, {axisPz});

registryData.add("protonQA/V0protonpxInJetV0frame", "V0protonpxInJetV0frame", kTH1F, {axisPx});
registryData.add("protonQA/V0protonpyInJetV0frame", "V0protonpyInJetV0frame", kTH1F, {axisPy});
Expand All @@ -300,6 +315,11 @@
registryData.add("protonQA/profileprotonsinthetaInJetV0frame", "Invariant Mass vs sin(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotonsinphiInJetV0frame", "Invariant Mass vs sin(phi)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("protonQA/profileprotoncosSquarethetaInJetV0frame", "Invariant Mass vs cos^2(theta)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("JetQA/JetthetaInJetV0frame", "JetthetaInJetV0frame", kTH1F, {axisTheta});
registryData.add("JetQA/JetphiInJetV0frame", "JetphiInJetV0frame", kTH1F, {axisPhi});
registryData.add("JetQA/JetpxInJetV0frame", "JetpxInJetV0frame", kTH1F, {axisPx});
registryData.add("JetQA/JetpyInJetV0frame", "JetpyInJetV0frame", kTH1F, {axisPy});
registryData.add("JetQA/JetpzInJetV0frame", "JetpzInJetV0frame", kTH1F, {axisPz});

registryData.add("V0LambdapxInJetV0frame", "V0LambdapxInJetV0frame", kTH1F, {axisPx});
registryData.add("V0LambdapyInJetV0frame", "V0LambdapyInJetV0frame", kTH1F, {axisPy});
Expand Down Expand Up @@ -376,7 +396,7 @@

registryV0Data.add("hprotoncosthetainLab", "hprotoncosthetainLab", kTH1F, {{200, -1.f, 1.f}});
registryV0Data.add("hprotonsinthetainLab", "hprotonsinthetainLab", kTH1F, {{200, -1.f, 1.f}});
registryV0Data.add("hprotonthetainLab", "hprotonthetainLab", kTH1F, {{200, 0.f, TMath::Pi()}});
registryV0Data.add("hprotonthetainLab", "hprotonthetainLab", kTH1F, {axisTheta});

registryV0Data.add("hprotoncosthetainV0", "hprotoncosthetainV0", kTH1F, {{200, -1.f, 1.f}});
registryV0Data.add("hprotonsinthetainV0", "hprotonsinthetainV0", kTH1F, {{200, -1.f, 1.f}});
Expand Down Expand Up @@ -487,8 +507,8 @@

TMatrixD LorentzTransInV0frame(double ELambda, double Lambdapx, double Lambdapy, double Lambdapz)
{
double PLambda = sqrt(Lambdapx * Lambdapx + Lambdapy * Lambdapy + Lambdapz * Lambdapz);

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[std-prefix] 

Use std:: prefix for names from the std namespace.
double LambdaMass = sqrt(ELambda * ELambda - PLambda * PLambda);

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[std-prefix] 

Use std:: prefix for names from the std namespace.
double Alpha = 1 / (LambdaMass * (ELambda + LambdaMass));
TMatrixD matrixLabToLambda(4, 4);
matrixLabToLambda(0, 0) = ELambda / LambdaMass;
Expand Down Expand Up @@ -557,10 +577,10 @@
registry.fill(HIST("V0protonpxInLab"), candidate.v0protonpx());
registry.fill(HIST("V0protonpyInLab"), candidate.v0protonpy());
registry.fill(HIST("V0protonpzInLab"), candidate.v0protonpz());
double protonsinPhiInLab = candidate.v0protonpy() / sqrt(candidate.v0protonpx() * candidate.v0protonpx() + candidate.v0protonpy() * candidate.v0protonpy());

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[std-prefix] 

Use std:: prefix for names from the std namespace.
registry.fill(HIST("V0protonphiInLab"), protonsinPhiInLab);
double PLambda = sqrt(candidate.v0px() * candidate.v0px() + candidate.v0py() * candidate.v0py() + candidate.v0pz() * candidate.v0pz());

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[std-prefix] 

Use std:: prefix for names from the std namespace.
double ELambda = sqrt(candidate.v0Lambdamass() * candidate.v0Lambdamass() + PLambda * PLambda);

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[std-prefix] 

Use std:: prefix for names from the std namespace.
TMatrixD pLabV0(4, 1);
pLabV0(0, 0) = ELambda;
pLabV0(1, 0) = candidate.v0px();
Expand All @@ -573,17 +593,17 @@
registry.fill(HIST("V0pzInRest_frame"), V0InV0(3, 0));
}
for (auto& candidate : myv0s) {
double PLambda = sqrt(candidate.v0px() * candidate.v0px() + candidate.v0py() * candidate.v0py() + candidate.v0pz() * candidate.v0pz());

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[std-prefix] 

Use std:: prefix for names from the std namespace.
double ELambda = sqrt(candidate.v0Lambdamass() * candidate.v0Lambdamass() + PLambda * PLambda);

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[std-prefix] 

Use std:: prefix for names from the std namespace.
TMatrixD pLabproton(4, 1);
double protonE = sqrt(massPr * massPr + candidate.v0protonpx() * candidate.v0protonpx() + candidate.v0protonpy() * candidate.v0protonpy() + candidate.v0protonpz() * candidate.v0protonpz());

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[std-prefix] 

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pLabproton(0, 0) = protonE;
pLabproton(1, 0) = candidate.v0protonpx();
pLabproton(2, 0) = candidate.v0protonpy();
pLabproton(3, 0) = candidate.v0protonpz();
TMatrixD protonInV0(4, 1);
protonInV0 = LorentzTransInV0frame(ELambda, candidate.v0px(), candidate.v0py(), candidate.v0pz()) * pLabproton;
double protonMassInV0 = sqrt(protonInV0(0, 0) * protonInV0(0, 0) - protonInV0(1, 0) * protonInV0(1, 0) - protonInV0(2, 0) * protonInV0(2, 0) - protonInV0(3, 0) * protonInV0(3, 0));

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[std-prefix] 

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registry.fill(HIST("V0protonMassInRest_frame"), protonMassInV0);
registry.fill(HIST("V0protonpxInRest_frame"), protonInV0(1, 0));
registry.fill(HIST("V0protonpyInRest_frame"), protonInV0(2, 0));
Expand Down Expand Up @@ -1516,6 +1536,7 @@
float maxJetpz = 0;
float maxJeteta = 0;
float maxJetphi = 0;
float maxJetE = 0;
float maxJetpT = 0;
float maxJetPt = -999;
for (auto& jet : jets) {
Expand All @@ -1541,6 +1562,7 @@
maxJetpy = jet.py();
maxJetpz = jet.pz();
maxJeteta = jet.eta();
maxJetE = jet.E();
maxJetphi = jet.phi();
maxJetpT = jet.pt();
maxJetPt = maxJetpT;
Expand Down Expand Up @@ -1609,6 +1631,12 @@
double ELambda = sqrt(candidate.mLambda() * candidate.mLambda() + PLambda * PLambda);
double protonE = sqrt(massPr * massPr + pos.px() * pos.px() + pos.py() * pos.py() + pos.pz() * pos.pz());

TMatrixD pLabJet(4, 1);
pLabJet(0, 0) = maxJetE;
pLabJet(1, 0) = maxJetpx;
pLabJet(2, 0) = maxJetpy;
pLabJet(3, 0) = maxJetpz;

TMatrixD pLabV0(4, 1);
pLabV0(0, 0) = ELambda;
pLabV0(1, 0) = candidate.px();
Expand Down Expand Up @@ -1641,9 +1669,16 @@
double protonPInLab = sqrt(pLabproton(1, 0) * pLabproton(1, 0) + pLabproton(2, 0) * pLabproton(2, 0) + pLabproton(3, 0) * pLabproton(3, 0));
double protonsinThetaInLab = protonPtInLab / protonPInLab;
double protonMassInLab = sqrt(pLabproton(0, 0) * pLabproton(0, 0) - pLabproton(1, 0) * pLabproton(1, 0) - pLabproton(2, 0) * pLabproton(2, 0) - pLabproton(3, 0) * pLabproton(3, 0));
double jettheta = maxJetpz / sqrt(pLabJet(1, 0) * pLabJet(1, 0) + pLabJet(2, 0) * pLabJet(2, 0) + pLabJet(3, 0) * pLabJet(3, 0));
double jetphi = maxJetpy / sqrt(pLabJet(1, 0) * pLabJet(1, 0) + pLabJet(2, 0) * pLabJet(2, 0));
registryData.fill(HIST("JetQA/JetthetaInLab"), TMath::ASin(jettheta));
registryData.fill(HIST("JetQA/JetphiInLab"), TMath::ASin(jetphi));
registryData.fill(HIST("JetQA/JetpxInLab"), pLabJet(1, 0));
registryData.fill(HIST("JetQA/JetpyInLab"), pLabJet(2, 0));
registryData.fill(HIST("JetQA/JetpzInLab"), pLabJet(3, 0));

registryData.fill(HIST("protonQA/V0protonphiInLab"), TMath::ASin(protonsinPhiInLab));
registryData.fill(HIST("protonQA/V0protonThetaInLab"), TMath::ASin(protonsinThetaInLab));
registryData.fill(HIST("protonQA/V0protonthetaInLab"), TMath::ASin(protonsinThetaInLab));
registryData.fill(HIST("protonQA/V0protoncosthetaInLab"), protoncosthetaInLab);
registryData.fill(HIST("protonQA/profileprotonsinthetaInLab"), candidate.mLambda(), protonsinThetaInLab);
registryData.fill(HIST("protonQA/profileprotonsinphiInLab"), candidate.mLambda(), protonsinPhiInLab);
Expand All @@ -1657,14 +1692,24 @@
double protonPtInV0 = sqrt(protonInV0(1, 0) * protonInV0(1, 0) + protonInV0(2, 0) * protonInV0(2, 0));
double protonsinThetaInV0 = protonPtInV0 / protonPInV0;

TMatrixD JetInV0(4, 1);
JetInV0 = LorentzTransInV0frame(ELambda, candidate.px(), candidate.py(), candidate.pz()) * pLabJet;
double jetthetaInV0 = JetInV0(3, 0) / sqrt(JetInV0(1, 0) * JetInV0(1, 0) + JetInV0(2, 0) * JetInV0(2, 0) + JetInV0(3, 0) * JetInV0(3, 0));
double jetphiInV0 = JetInV0(2, 0) / sqrt(JetInV0(1, 0) * JetInV0(1, 0) + JetInV0(2, 0) * JetInV0(2, 0));
registryData.fill(HIST("JetQA/JetthetaInV0"), TMath::ASin(jetthetaInV0));
registryData.fill(HIST("JetQA/JetphiInV0"), TMath::ASin(jetphiInV0));
registryData.fill(HIST("JetQA/JetpxInV0"), JetInV0(1, 0));
registryData.fill(HIST("JetQA/JetpyInV0"), JetInV0(2, 0));
registryData.fill(HIST("JetQA/JetpzInV0"), JetInV0(3, 0));

registryData.fill(HIST("protonQA/V0protonMassInRest_frame"), protonMassInV0);
registryData.fill(HIST("protonQA/V0protonpxInRest_frame"), protonInV0(1, 0));
registryData.fill(HIST("protonQA/V0protonpyInRest_frame"), protonInV0(2, 0));
registryData.fill(HIST("protonQA/V0protonpzInRest_frame"), protonInV0(3, 0));
double protonsinPhiInV0frame = protonInV0(2, 0) / sqrt(protonInV0(1, 0) * protonInV0(1, 0) + protonInV0(2, 0) * protonInV0(2, 0));
double protoncosthetaInV0frame = protonInV0(3, 0) / sqrt(protonInV0(1, 0) * protonInV0(1, 0) + protonInV0(2, 0) * protonInV0(2, 0) + protonInV0(3, 0) * protonInV0(3, 0));
registryData.fill(HIST("protonQA/V0protonphiInRest_frame"), TMath::ASin(protonsinPhiInV0frame));
registryData.fill(HIST("protonQA/V0protonThetaInRest_frame"), TMath::ASin(protonsinThetaInV0));
registryData.fill(HIST("protonQA/V0protonthetaInRest_frame"), TMath::ASin(protonsinThetaInV0));
registryData.fill(HIST("protonQA/V0protoncosthetaInV0frame"), protoncosthetaInV0frame);
registryData.fill(HIST("protonQA/profileprotonsinthetaInV0frame"), candidate.mLambda(), protonsinThetaInV0);
registryData.fill(HIST("protonQA/profileprotonsinphiInV0frame"), candidate.mLambda(), protonsinPhiInV0frame);
Expand All @@ -1679,11 +1724,21 @@
double protonSinThetainJet = protonPtinJet / protonPinJet;
double protonMassInJetframe = sqrt(protonInJet(0, 0) * protonInJet(0, 0) - protonInJet(1, 0) * protonInJet(1, 0) - protonInJet(2, 0) * protonInJet(2, 0) - protonInJet(3, 0) * protonInJet(3, 0));

TMatrixD pInJet(4, 1);
pInJet = MyTMatrixTranslationToJet(maxJetpx, maxJetpy, maxJetpz, candidate.px(), candidate.py(), candidate.pz()) * pLabJet;
double jetthetaInJet = pInJet(3, 0) / sqrt(pInJet(1, 0) * pInJet(1, 0) + pInJet(2, 0) * pInJet(2, 0) + pInJet(3, 0) * pInJet(3, 0));
double jetphiInJet = pInJet(2, 0) / sqrt(pInJet(1, 0) * pInJet(1, 0) + pInJet(2, 0) * pInJet(2, 0));
registryData.fill(HIST("JetQA/JetthetaInJetframe"), TMath::ASin(jetthetaInJet));
registryData.fill(HIST("JetQA/JetphiInJetframe"), TMath::ASin(jetphiInJet));
registryData.fill(HIST("JetQA/JetpxInJetframe"), pInJet(1, 0));
registryData.fill(HIST("JetQA/JetpyInJetframe"), pInJet(2, 0));
registryData.fill(HIST("JetQA/JetpzInJetframe"), pInJet(3, 0));

registryData.fill(HIST("protonQA/V0protonpxInJetframe"), protonInJet(1, 0));
registryData.fill(HIST("protonQA/V0protonpyInJetframe"), protonInJet(2, 0));
registryData.fill(HIST("protonQA/V0protonpzInJetframe"), protonInJet(3, 0));
registryData.fill(HIST("protonQA/V0protonphiInJetframe"), TMath::ASin(protonsinPhiInJet));
registryData.fill(HIST("protonQA/V0protonThetaInJetframe"), TMath::ASin(protonSinThetainJet));
registryData.fill(HIST("protonQA/V0protonthetaInJetframe"), TMath::ASin(protonSinThetainJet));
registryData.fill(HIST("protonQA/V0protoncosthetaInJetframe"), protoncosthetaInJet);
registryData.fill(HIST("protonQA/profileprotonsinthetaInJetframe"), candidate.mLambda(), protonSinThetainJet);
registryData.fill(HIST("protonQA/profileprotonsinphiInJetframe"), candidate.mLambda(), protonsinPhiInJet);
Expand All @@ -1699,11 +1754,21 @@
double protonSinThetainJetV0 = protonPtinJetV0 / protonPinJetV0;
double protonMassInJetV0frame = sqrt(protonInJetV0(0, 0) * protonInJetV0(0, 0) - protonInJetV0(1, 0) * protonInJetV0(1, 0) - protonInJetV0(2, 0) * protonInJetV0(2, 0) - protonInJetV0(3, 0) * protonInJetV0(3, 0));

TMatrixD JetInJetV0(4, 1);
JetInJetV0 = LorentzTransInV0frame(ELambda, lambdaInJet(1, 0), lambdaInJet(2, 0), lambdaInJet(3, 0)) * MyTMatrixTranslationToJet(maxJetpx, maxJetpy, maxJetpz, candidate.px(), candidate.py(), candidate.pz()) * pLabJet;
double jetthetaInJetV0 = JetInJetV0(3, 0) / sqrt(JetInJetV0(1, 0) * JetInJetV0(1, 0) + JetInJetV0(2, 0) * JetInJetV0(2, 0) + JetInJetV0(3, 0) * JetInJetV0(3, 0));
double jetphiInJetV0 = JetInJetV0(2, 0) / sqrt(JetInJetV0(1, 0) * JetInJetV0(1, 0) + JetInJetV0(2, 0) * JetInJetV0(2, 0));
registryData.fill(HIST("JetQA/JetthetaInJetV0frame"), TMath::ASin(jetthetaInJetV0));
registryData.fill(HIST("JetQA/JetphiInJetV0frame"), TMath::ASin(jetphiInJetV0));
registryData.fill(HIST("JetQA/JetpxInJetV0frame"), JetInJetV0(1, 0));
registryData.fill(HIST("JetQA/JetpyInJetV0frame"), JetInJetV0(2, 0));
registryData.fill(HIST("JetQA/JetpzInJetV0frame"), JetInJetV0(3, 0));

registryData.fill(HIST("protonQA/V0protonpxInJetV0frame"), protonInJetV0(1, 0));
registryData.fill(HIST("protonQA/V0protonpyInJetV0frame"), protonInJetV0(2, 0));
registryData.fill(HIST("protonQA/V0protonpzInJetV0frame"), protonInJetV0(3, 0));
registryData.fill(HIST("protonQA/V0protonphiInJetV0frame"), TMath::ASin(protonsinphiInJetV0));
registryData.fill(HIST("protonQA/V0protonThetaInJetV0frame"), TMath::ASin(protonSinThetainJetV0));
registryData.fill(HIST("protonQA/V0protonthetaInJetV0frame"), TMath::ASin(protonSinThetainJetV0));
registryData.fill(HIST("protonQA/V0protoncosthetaInJetV0"), protoncosthetaInJetV0);
registryData.fill(HIST("protonQA/V0protonMassInJetV0frame"), protonMassInJetV0frame);
registryData.fill(HIST("protonQA/profileprotonsinthetaInJetV0frame"), candidate.mLambda(), protonSinThetainJetV0);
Expand Down
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