diff --git a/Shower/QTilde/Kinematics/KinematicHelpers.h b/Shower/QTilde/Kinematics/KinematicHelpers.h
new file mode 100644
--- /dev/null
+++ b/Shower/QTilde/Kinematics/KinematicHelpers.h
@@ -0,0 +1,43 @@
+// -*- C++ -*-
+//
+// KinematicHelpers.h is a part of Herwig - A multi-purpose Monte Carlo event generator
+// Copyright (C) 2018 The Herwig Collaboration
+//
+// Herwig is licenced under version 3 of the GPL, see COPYING for details.
+// Please respect the MCnet academic guidelines, see GUIDELINES for details.
+//
+#ifndef HERWIG_KinematicHelpers_H
+#define HERWIG_KinematicHelpers_H
+
+namespace QTildeKinematics {
+
+
+
+inline Energy2 pT2_FSR(Energy2 qt2, double z, Energy2 m02, Energy2 m12, Energy2 m22) {
+	return sqr(z*(1-z))*(qt2-m02) - m12*(1-z) - m22*z;
+}
+
+
+inline Energy2 pT2_ISR(Energy2 qt2, double z, Energy2 m2) {
+	return sqr(1-z)*qt2 - m2*z;
+}
+
+
+
+inline Energy pT_FSR(Energy2 qt2, double z, Energy2 m02, Energy2 m12, Energy2 m22) {
+	return sqrt( pT2_FSR(qt2,z,m02,m12,m22) );
+}
+
+
+inline Energy pT_ISR(Energy2 qt2, double z, Energy2 m2) {
+	return sqrt( pT2_ISR(qt2,z,m2) );
+}
+
+
+
+
+}
+
+
+
+#endif