[Rivet-svn] r2639 - trunk/src/Projections

[blackhole at projects.hepforge.org]

Author: buckley
Date: Mon Aug  2 22:08:28 2010
New Revision: 2639

Log:
Protecting against mass2() < 0 leading to assert fail/NaNs in mass() calls

Modified:
   trunk/src/Projections/InvMassFinalState.cc

Modified: trunk/src/Projections/InvMassFinalState.cc
==============================================================================
--- trunk/src/Projections/InvMassFinalState.cc	Mon Aug  2 21:52:02 2010	(r2638)
+++ trunk/src/Projections/InvMassFinalState.cc	Mon Aug  2 22:08:28 2010	(r2639)
@@ -88,6 +88,7 @@
     foreach (const Particle* i1, type1) {
       foreach (const Particle* i2, type2) {
         FourMomentum v4 = i1->momentum() + i2->momentum();
+        if (v4.mass2() < 0) continue;
         if (v4.mass() > _minmass && v4.mass() < _maxmass) {
           getLog() << Log::DEBUG << "Selecting particles with IDs "
                    << i1->pdgId() << " & " << i2->pdgId()