2 papers
hep-th2024
New shape for cross-bispectra in Chern-Simons gravity
Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin +2
Chern-Simons gravity is known to suffer from graviton ghost production during inflation, which suppresses the parity-violating power spectrum at scales relevant to cosmic microwave…
astro-ph.CO2024
Testing Gravity with Frequency-Dependent Overlap Reduction Function in Pulsar Timing Array
Qiuyue Liang, Ippei Obata, Misao Sasaki
The positive evidence of a nano-hertz gravitational wave background recently found by several pulsar timing array (PTA) collaborations opened up a window to test modified gravity t…