Kumar, RahulRahulKumar2025-08-282025-08-282021-02-01http://arxiv.org/abs/2102.05127http://repository.iitgn.ac.in/handle/IITG2025/20088Ramanujan provided several results involving the modified Bessel function Kz(x) in his Lost Notebook. One of them is the famous Ramanujan-Guinand formula, equivalent to the functional equation of the non-holomorphic Eiesenstien series on SL2(z). Recently, this formula was generalized by Dixit, Kesarwani, and Moll. In this article, we first obtain a generalization of a theorem of Watson and, as an application of it, give a new proof of the result of Dixit, Kesarwani, and Moll. Watson�s theorem is also generalized in a different direction using �Kz(x, ?) which is itself a generalization of Kz(x). Analytic continuation of all these results are also given.en-USWatson's theoremRamanujanGuinande-Printe-Print123456789/555