Sep 28, 2024 #1 zb23 27 2 In the spectrum of the closed string, we encountered a graviton. Why is the symmetric 2-tensor in the open string spectrum, not a graviton?
In the spectrum of the closed string, we encountered a graviton. Why is the symmetric 2-tensor in the open string spectrum, not a graviton?
Oct 6, 2024 #2 Demystifier Science Advisor Insights Author Gold Member 14,293 6,769 Because it has mass.