Tachyon Mediated Non-Gaussianity


Leblond, L. (2008). Tachyon Mediated Non-Gaussianity. Perimeter Institute. https://pirsa.org/08120036


Leblond, Louis. Tachyon Mediated Non-Gaussianity. Perimeter Institute, Dec. 11, 2008, https://pirsa.org/08120036


          @misc{ pirsa_PIRSA:08120036,
            doi = {10.48660/08120036},
            url = {https://pirsa.org/08120036},
            author = {Leblond, Louis},
            keywords = {Quantum Fields and Strings, Cosmology},
            language = {en},
            title = {Tachyon Mediated Non-Gaussianity},
            publisher = {Perimeter Institute},
            year = {2008},
            month = {dec},
            note = {PIRSA:08120036 see, \url{https://pirsa.org}}

Louis Leblond Pennsylvania State University


I will discuss the various sources of non-Gaussianity (NG) in a class of multi-field models of inflation. I will show that there is both an intrinsic and a local contribution to the NG although they both have the same shape. It is also possible in this class of models that the dominant part to the 3-pt function comes from loop diagrams. These models are of the hybrid type and while they occur naturally in string theory, the conditions for the NG to be important are not generic.