Chakravarti, KabirKabirChakravartiGhosh, RajesRajesGhoshSarkar, SudiptaSudiptaSarkar2025-08-312025-08-312022-08-1510.1103/PhysRevD.106.L0415032-s2.0-85138154335https://d8.irins.org/handle/IITG2025/25965Recent gravitational wave observation based on the data from GW150914 has confirmed Hawking's area theorem and estimated the increase in total horizon area during a merger process of two Kerr black holes. We use this result and the validity of the second law to obtain the first observational bound on the 4D topological Gauss-Bonnet coupling as γ≲2.804-1.169+7.946×109m2 with 95% credibility.falseArticlehttps://arxiv.org/pdf/2201.087002470002915 August 20227L041503arJournal7WOS:000898695600001