From feb2d1424b01100ccba58c568a517fff8caa4f92 Mon Sep 17 00:00:00 2001
From: David Rohr <drohr@jwdt.org>
Date: Fri, 28 Mar 2025 12:45:28 +0100
Subject: [PATCH] GPU TPC: Fix Bz=0 threshold

---
 GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx b/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx
index 288a24dee5d99..f03964d35ff82 100644
--- a/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx
+++ b/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx
@@ -1740,7 +1740,7 @@ GPUd() void GPUTPCGMMerger::CollectMergedTracks(int32_t nBlocks, int32_t nThread
     p1.DzDs() = p2.DzDs();
     p1.QPt() = p2.QPt();
     mergedTrack.SetAlpha(p2.Alpha());
-    if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.01f * gpu_common_constants::kCLight)) {
+    if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.013f * gpu_common_constants::kCLight)) {
       p1.QPt() = 100.f / Param().rec.bz0Pt10MeV;
     }