From 0c4f639abcdbb45273c343caf5499e832047fcea Mon Sep 17 00:00:00 2001
From: Guang Zhao <zhaog@ihep.ac.cn>
Date: Mon, 23 Dec 2024 11:15:15 +0800
Subject: [PATCH] fix costheta bug
---
Service/SimplePIDSvc/src/SimplePIDSvc.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Service/SimplePIDSvc/src/SimplePIDSvc.cpp b/Service/SimplePIDSvc/src/SimplePIDSvc.cpp
index 5ccece5b..ecdeedf3 100644
--- a/Service/SimplePIDSvc/src/SimplePIDSvc.cpp
+++ b/Service/SimplePIDSvc/src/SimplePIDSvc.cpp
@@ -29,12 +29,12 @@ double SimplePIDSvc::getDndx(double mean, double sigma) {
double SimplePIDSvc::getDndxMean(double bg, double cos)
{
- return interpolate(m_dndxMean, bg, cos);
+ return interpolate(m_dndxMean, bg, fabs(cos));
}
double SimplePIDSvc::getDndxSigma(double bg, double cos, double len)
{
- return interpolate(m_dndxSigma, bg, cos)/sqrt(len*0.1); // len in mm, need to convert to cm
+ return interpolate(m_dndxSigma, bg, fabs(cos))/sqrt(len*0.1); // len in mm, need to convert to cm
}
double SimplePIDSvc::getChi2(double dndx_meas, double dndx_exp, double dndx_sigma) {
--
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