deletions | additions       diff --git a/HiggsPhysicsAt500GeV.tex b/HiggsPhysicsAt500GeV.tex  index 3f1691c..b9166e7 100644  --- a/HiggsPhysicsAt500GeV.tex  +++ b/HiggsPhysicsAt500GeV.tex 
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Similarly, the opening of the $\epemto {\rm ZHH}$ and $\nnbar{\rm HH}$ processes at $\sqrt{s} = 500$~GeV enables a ``measurement'' of the triple Higgs-boson self-coupling, $\lambda_{\rm H}$ with 50 to 80\% precision. Again, these accuracies are not competitive with the HL-LHC projections, for which a 30\% accuracy on $\lambda_{\rm H}$ is envisioned.   At this stage of the study, it appears that once sufficient $\epem$ data are collected at 250 and 350 GeV, the potential gain in Higgs physics alone is not enough to justify an upgrade to a centre-of-mass energy  of 500~GeV. (On the other hand, as discussed below, the appearance of some threshold for new physics above 350~GeV could change the picture entirely.)