Skip to content

[PWGLF] Local polarization of Lambda induced by jets in Run3 pp collisions at 13.6 TeV #13754

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
romainschotter merged 1 commit into from
Nov 10, 2025
+13 −4
Merged

[PWGLF] Local polarization of Lambda induced by jets in Run3 pp collisions at 13.6 TeV #13754

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 13 additions & 4 deletions PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,8 +22,7 @@
#include "Common/Core/trackUtilities.h"
#include "Common/DataModel/CollisionAssociationTables.h"
#include "Common/DataModel/EventSelection.h"
#include "Common/DataModel/PIDResponseTOF.h"
#include "Common/DataModel/PIDResponseTPC.h"
#include "Common/DataModel/PIDResponse.h"

#include "Framework/ASoA.h"
#include "Framework/AnalysisDataModel.h"
Expand All @@ -50,7 +49,7 @@
#include <fastjet/tools/Subtractor.hh>

#include <cmath>
#include <iostream>

Check failure on line 52 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[include-iostream] 

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

Expand Down Expand Up @@ -202,6 +201,10 @@
registryData.add("V0pyInRest_frame", "V0pyInRest_frame", kTH1F, {axisPy});
registryData.add("V0pzInRest_frame", "V0pzInRest_frame", kTH1F, {axisPz});

registryData.add("V0pxInJetframe", "V0pxInJetframe", kTH1F, {axisPx});
registryData.add("V0pyInJetframe", "V0pyInJetframe", kTH1F, {axisPy});
registryData.add("V0pzInJetframe", "V0pzInJetframe", kTH1F, {axisPz});

registryData.add("protonQA/V0protonpxInLab", "V0protonpxInLab", kTH1F, {axisPx});
registryData.add("protonQA/V0protonpyInLab", "V0protonpyInLab", kTH1F, {axisPy});
registryData.add("protonQA/V0protonpzInLab", "V0protonpzInLab", kTH1F, {axisPz});
Expand Down Expand Up @@ -285,7 +288,7 @@
registryData.add("profileAntiLambda", "Invariant Mass vs sin(phi)", {HistType::kTProfile, {{200, 0.9, 1.2}}});
registryData.add("TProfile1DLambdasinphiInJet", "#Delta #theta vs sin(phi)", {HistType::kTProfile, {{200, 0.0, TMath::Pi()}}});
registryData.add("hAntiLambdamassandSinPhi", "hAntiLambdaPhiandSinPhi", kTH2F, {{200, -TMath::Pi() / 2, TMath::Pi() / 2}, {200, -1, 1}});

registryData.add("hprotonsinphiInJetV0frame", "hprotonsinphiInJetV0frame", kTH1F, {axisSinPhi});
registryData.add("TProfile2DLambdaPtMassSinPhi", "", kTProfile2D, {TProfile2DaxisMass, TProfile2DaxisPt});
registryData.add("TProfile2DAntiLambdaPtMassSinPhi", "", kTProfile2D, {TProfile2DaxisMass, TProfile2DaxisPt});
registryData.add("TProfile2DLambdaPtMassSintheta", "", kTProfile2D, {TProfile2DaxisMass, TProfile2DaxisPt});
Expand All @@ -300,7 +303,7 @@
registryData.add("hprotonThetaInV0", "hprotonThetaInV0", kTH1F, {axisTheta});
registryData.add("hprotonThetaInJetV0", "hprotonThetaInJetV0", kTH1F, {axisTheta});

registryData.add("hNEvents", "hNEvents", {HistType::kTH1I, {{10, 0.f, 10.f}}});
registryData.add("hNEvents", "hNEvents", {HistType::kTH1D, {{10, 0.f, 10.f}}});
registryData.get<TH1>(HIST("hNEvents"))->GetXaxis()->SetBinLabel(1, "all");
registryData.get<TH1>(HIST("hNEvents"))->GetXaxis()->SetBinLabel(2, "sel8");
registryData.get<TH1>(HIST("hNEvents"))->GetXaxis()->SetBinLabel(3, "TVX");
Expand Down Expand Up @@ -342,8 +345,8 @@

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

Check failure on line 348 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

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

Check failure on line 349 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[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 @@ -1258,9 +1261,9 @@
registryData.fill(HIST("protonQA/V0protonpyInLab"), pos.py());
registryData.fill(HIST("protonQA/V0protonpzInLab"), pos.pz());

double PLambda = sqrt(candidate.px() * candidate.px() + candidate.py() * candidate.py() + candidate.pz() * candidate.pz());

Check failure on line 1264 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

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

Check failure on line 1265 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.
double protonE = sqrt(massPr * massPr + pos.px() * pos.px() + pos.py() * pos.py() + pos.pz() * pos.pz());

Check failure on line 1266 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.

TMatrixD pLabJet(4, 1);
pLabJet(0, 0) = maxJetE;
Expand All @@ -1282,11 +1285,15 @@

TMatrixD lambdaInJet(4, 1);
lambdaInJet = MyTMatrixTranslationToJet(maxJetpx, maxJetpy, maxJetpz, candidate.px(), candidate.py(), candidate.pz()) * pLabV0;
double cosThetaLambdaInJet = lambdaInJet(3, 0) / sqrt(lambdaInJet(1, 0) * lambdaInJet(1, 0) + lambdaInJet(2, 0) * lambdaInJet(2, 0) + lambdaInJet(3, 0) * lambdaInJet(3, 0));

Check failure on line 1288 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.
double lambdasinphiInJet = lambdaInJet(2, 0) / sqrt(lambdaInJet(1, 0) * lambdaInJet(1, 0) + lambdaInJet(2, 0) * lambdaInJet(2, 0));

Check failure on line 1289 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.
registryData.fill(HIST("TProfile2DLambdaMassDeltaTheta"), TMath::ACos(cosThetaLambdaInJet), candidate.mLambda(), lambdasinphiInJet);
registryData.fill(HIST("TProfile1DLambdasinphiInJet"), TMath::ACos(cosThetaLambdaInJet), lambdasinphiInJet);

registryData.fill(HIST("V0pxInJetframe"), lambdaInJet(1, 0));
registryData.fill(HIST("V0pyInJetframe"), lambdaInJet(2, 0));
registryData.fill(HIST("V0pzInJetframe"), lambdaInJet(3, 0));

TMatrixD lambdaInJetV0(4, 1);
lambdaInJetV0 = LorentzTransInV0frame(ELambda, lambdaInJet(1, 0), lambdaInJet(2, 0), lambdaInJet(3, 0)) * MyTMatrixTranslationToJet(maxJetpx, maxJetpy, maxJetpz, candidate.px(), candidate.py(), candidate.pz()) * pLabV0;
registryData.fill(HIST("V0LambdapxInJetV0frame"), lambdaInJetV0(1, 0));
Expand All @@ -1298,8 +1305,8 @@
pLabproton(1, 0) = pos.px();
pLabproton(2, 0) = pos.py();
pLabproton(3, 0) = pos.pz();
double protonsinPhiInLab = pLabproton(2, 0) / sqrt(pLabproton(1, 0) * pLabproton(1, 0) + pLabproton(2, 0) * pLabproton(2, 0));

Check failure on line 1308 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.
double protoncosthetaInLab = pLabproton(3, 0) / sqrt(pLabproton(1, 0) * pLabproton(1, 0) + pLabproton(2, 0) * pLabproton(2, 0) + pLabproton(3, 0) * pLabproton(3, 0));

Check failure on line 1309 in PWGLF/Tasks/Strangeness/lambdaJetpolarization.cxx

View workflow job for this annotation

GitHub Actions / O2 linter

[std-prefix] 

Use std:: prefix for names from the std namespace.
double protonPtInLab = sqrt(pLabproton(1, 0) * pLabproton(1, 0) + pLabproton(2, 0) * pLabproton(2, 0));
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;
Expand Down Expand Up @@ -1422,6 +1429,8 @@

protonsinPhiInJetV0frame = protonsinPhiInJetV0frame + protonInJetV0(2, 0) / sqrt(protonInJetV0(1, 0) * protonInJetV0(1, 0) + protonInJetV0(2, 0) * protonInJetV0(2, 0));

registryData.fill(HIST("hprotonsinphiInJetV0frame"), protonsinPhiInJetV0frame);

registryData.fill(HIST("TProfile2DLambdaPtMassSinPhi"), candidate.mLambda(), candidate.pt(), protonInJetV0(2, 0) / sqrt(protonInJetV0(1, 0) * protonInJetV0(1, 0) + protonInJetV0(2, 0) * protonInJetV0(2, 0)));
registryData.fill(HIST("TProfile2DLambdaPtMassSintheta"), candidate.mLambda(), candidate.pt(), (4.0 / TMath::Pi()) * protonSinThetainJetV0);
registryData.fill(HIST("TProfile2DLambdaPtMassCosSquareTheta"), candidate.mLambda(), candidate.pt(), 3.0 * protonCosThetainJetV0 * protonCosThetainJetV0);
Expand Down
Loading