From 4f84c8aa6c507dc172d8016a876a578f510c873d Mon Sep 17 00:00:00 2001
From: Markus Seidel <markus.seidel@cern.ch>
Date: Mon, 19 Jun 2023 18:25:47 +0200
Subject: [PATCH] Revert "Powheg+Vincia matching"

This reverts commit 1c80a7d7d19ee65787d9851293032af8d237fe39.
---
 .../plugins/Pythia8Hadronizer.cc              | 26 ++-----------------
 1 file changed, 2 insertions(+), 24 deletions(-)

diff --git a/GeneratorInterface/Pythia8Interface/plugins/Pythia8Hadronizer.cc b/GeneratorInterface/Pythia8Interface/plugins/Pythia8Hadronizer.cc
index fbeca29a6c45e..231f9b7a7ad8a 100644
--- a/GeneratorInterface/Pythia8Interface/plugins/Pythia8Hadronizer.cc
+++ b/GeneratorInterface/Pythia8Interface/plugins/Pythia8Hadronizer.cc
@@ -29,7 +29,6 @@ using namespace Pythia8;
 // Emission Veto Hooks
 //
 #include "Pythia8Plugins/PowhegHooks.h"
-#include "Pythia8Plugins/PowhegHooksVincia.h"
 #include "GeneratorInterface/Pythia8Interface/plugins/EmissionVetoHook1.h"
 
 // Resonance scale hook
@@ -133,7 +132,6 @@ class Pythia8Hadronizer : public Py8InterfaceBase {
   // Emission Veto Hooks
   //
   std::shared_ptr<PowhegHooks> fEmissionVetoHook;
-  std::shared_ptr<PowhegHooksVincia> fEmissionVetoHookVincia;
   std::shared_ptr<EmissionVetoHook1> fEmissionVetoHook1;
 
   // Resonance scale hook
@@ -386,10 +384,7 @@ bool Pythia8Hadronizer::initializeForInternalPartons() {
     (fUserHooksVector->hooks).push_back(fEmissionVetoHook1);
   }
 
-  bool VinciaShower = fMasterGen->settings.mode("PartonShowers:Model") == 2;
-
-  if ((fMasterGen->settings.mode("POWHEG:veto") > 0 || fMasterGen->settings.mode("POWHEG:MPIveto") > 0) &&
-      !VinciaShower) {
+  if (fMasterGen->settings.mode("POWHEG:veto") > 0 || fMasterGen->settings.mode("POWHEG:MPIveto") > 0) {
     if (fJetMatchingHook.get() || fEmissionVetoHook1.get())
       throw edm::Exception(edm::errors::Configuration, "Pythia8Interface")
           << " Attempt to turn on PowhegHooks by pythia8 settings but there are incompatible hooks on \n Incompatible "
@@ -402,13 +397,6 @@ bool Pythia8Hadronizer::initializeForInternalPartons() {
     (fUserHooksVector->hooks).push_back(fEmissionVetoHook);
   }
 
-  if (fMasterGen->settings.mode("POWHEG:veto") > 0 && VinciaShower) {
-    edm::LogInfo("Pythia8Interface") << "Turning on Vincia Emission Veto Hook from pythia8 code";
-    if (!fEmissionVetoHookVincia.get())
-      fEmissionVetoHookVincia.reset(new PowhegHooksVincia());
-    (fUserHooksVector->hooks).push_back(fEmissionVetoHookVincia);
-  }
-
   bool PowhegRes = fMasterGen->settings.flag("POWHEGres:calcScales");
   if (PowhegRes) {
     edm::LogInfo("Pythia8Interface") << "Turning on resonance scale setting from CMSSW Pythia8Interface";
@@ -555,10 +543,7 @@ bool Pythia8Hadronizer::initializeForExternalPartons() {
     }
   }
 
-  bool VinciaShower = fMasterGen->settings.mode("PartonShowers:Model") == 2;
-
-  if ((fMasterGen->settings.mode("POWHEG:veto") > 0 || fMasterGen->settings.mode("POWHEG:MPIveto") > 0) &&
-      !VinciaShower) {
+  if (fMasterGen->settings.mode("POWHEG:veto") > 0 || fMasterGen->settings.mode("POWHEG:MPIveto") > 0) {
     if (fJetMatchingHook.get() || fEmissionVetoHook1.get())
       throw edm::Exception(edm::errors::Configuration, "Pythia8Interface")
           << " Attempt to turn on PowhegHooks by pythia8 settings but there are incompatible hooks on \n Incompatible "
@@ -571,13 +556,6 @@ bool Pythia8Hadronizer::initializeForExternalPartons() {
     (fUserHooksVector->hooks).push_back(fEmissionVetoHook);
   }
 
-  if (fMasterGen->settings.mode("POWHEG:veto") > 0 && VinciaShower) {
-    edm::LogInfo("Pythia8Interface") << "Turning on Vincia Emission Veto Hook from pythia8 code";
-    if (!fEmissionVetoHookVincia.get())
-      fEmissionVetoHookVincia.reset(new PowhegHooksVincia());
-    (fUserHooksVector->hooks).push_back(fEmissionVetoHookVincia);
-  }
-
   bool PowhegRes = fMasterGen->settings.flag("POWHEGres:calcScales");
   if (PowhegRes) {
     edm::LogInfo("Pythia8Interface") << "Turning on resonance scale setting from CMSSW Pythia8Interface";