[PWGDQ] Including a histogram for low mass polarization in Production frame (#11387)

Author: KangkanGoswami

PWGDQ/Core/HistogramsLibrary.cxx

@@ -1249,6 +1249,18 @@ void o2::aod::dqhistograms::DefineHistograms(HistogramManager* hm, const char* h
         hm->AddHistogram(histClass, "Mass_Pt_cosThetaPP_phiPP", "", 4, varspTPP, binspT, xminpT, xmaxpT, 0, -1, kFALSE);
         hm->AddHistogram(histClass, "Mass_y_cosThetaPP_phiPP", "", 4, varsrapPP, binsy, xminy, xmaxy, 0, -1, kFALSE);
       }
+      if (subGroupStr.Contains("dimuon-polarization-lowmass-pp")) {
+        int varspTPP[4] = {VarManager::kMass, VarManager::kPt, VarManager::kCosThetaPP, VarManager::kPhiPP};
+        int varsrapPP[4] = {VarManager::kMass, VarManager::kRap, VarManager::kCosThetaPP, VarManager::kPhiPP};
+        int binspT[4] = {100, 20, 20, 20};
+        int binsy[4] = {100, 10, 20, 20};
+        double xminpT[4] = {0.2, 0., -1., -3.14};
+        double xmaxpT[4] = {1.5, 20., 1., +3.14};
+        double xminy[4] = {0.2, 2.5, -1., -3.14};
+        double xmaxy[4] = {1.5, 4.0, 1., +3.14};
+        hm->AddHistogram(histClass, "Mass_Pt_cosThetaPP_phiPP", "", 4, varspTPP, binspT, xminpT, xmaxpT, 0, -1, kFALSE);
+        hm->AddHistogram(histClass, "Mass_y_cosThetaPP_phiPP", "", 4, varsrapPP, binsy, xminy, xmaxy, 0, -1, kFALSE);
+      }
       if (subGroupStr.Contains("upsilon-polarization-he")) {
         int varspTHE[4] = {VarManager::kMass, VarManager::kPt, VarManager::kCosThetaHE, VarManager::kPhiHE};
         int varsrapHE[4] = {VarManager::kMass, VarManager::kRap, VarManager::kCosThetaHE, VarManager::kPhiHE};