From 1977a60dcfada414f5ddd8f95acfe65f0682fb74 Mon Sep 17 00:00:00 2001
From: Rajarshi Bhattacharya <rajarshi.bhattacharya@cern.ch>
Date: Mon, 19 Feb 2024 15:29:22 +0100
Subject: [PATCH] Increase of the precision of pt, eta, phi of the GenParticles

---
 PhysicsTools/NanoAOD/python/custom_muon_cff.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/PhysicsTools/NanoAOD/python/custom_muon_cff.py b/PhysicsTools/NanoAOD/python/custom_muon_cff.py
index 5cf72e74ec9e5..3ae8c3b1f8cdc 100644
--- a/PhysicsTools/NanoAOD/python/custom_muon_cff.py
+++ b/PhysicsTools/NanoAOD/python/custom_muon_cff.py
@@ -329,12 +329,21 @@ def AddTriggerObjectBits(process):
 
     return process
 
+def IncreaseGenPrecesion(process):
+    
+    process.genParticleTable.variables.pt = Var("pt",  float, precision=16)
+    process.genParticleTable.variables.eta = Var("eta",  float,precision=16)
+    process.genParticleTable.variables.phi = Var("phi", float,precision=16)
+    
+    return process
+
 def PrepMuonCustomNanoAOD(process):
     
     process = Custom_Muon_Task(process)
     process = AddPFTracks(process)
     process = AddVariablesForMuon(process)
     process = AddTriggerObjectBits(process)
+    process = IncreaseGenPrecesion(process)
 
 
     return process