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D40.1759140740.diff
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diff --git a/doc/ReleaseNotes.md b/doc/ReleaseNotes.md
--- a/doc/ReleaseNotes.md
+++ b/doc/ReleaseNotes.md
@@ -1,5 +1,9 @@
# Laura++ release notes
+27th November 2020 Dan Johnson
+* Allow slope of NR exponential model to vary negative - improves fit stability in low-statistics fits
+ - see https://phab.hepforge.org/T128
+
17th September 2020 Mark Whitehead
* Begin updates to use inclusive language. Simultaneous fits now handled by Coordinator and Tasks
- see https://phab.hepforge.org/T112
diff --git a/src/LauBelleNR.cc b/src/LauBelleNR.cc
--- a/src/LauBelleNR.cc
+++ b/src/LauBelleNR.cc
@@ -49,7 +49,7 @@
parName += "_alpha";
alpha_ = resInfo->getExtraParameter( parName );
if ( alpha_ == 0 ) {
- alpha_ = new LauParameter( parName, 0.0, 0.0, 10.0, kTRUE );
+ alpha_ = new LauParameter( parName, 0.0, -2.0, 10.0, kTRUE );
alpha_->secondStage(kTRUE);
resInfo->addExtraParameter( alpha_ );
}
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D40: Allow slope of exponential non-resonant shape to vary positive (for low-stats fits)
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