Primordial Non-Gaussianity

Authors: P. Daniel Meerburg, Nicola Bartolo, Adam D. Myers, Weishuang Linda Xu, Theodore Kisner, F. R. Bouchet, M. Liguori, David Alonso, Vera Gluscevic, Asantha Cooray, Elisa Chisari, Andrew J. Tolley, A. Nomerotski, Eva Silverstein, Matteo Fasiello, Lyman A. Page, Chetan Bavdhankar, Gustavo Niz, M. Lattanzi, Marc Kamionkowski, José Luis Bernal, M. C. David Marsh, Graziano Rossi, Axel de la Macorra, J. E. Ruhl, Marcel Schmittfull, J. Chaves-Montero, Thomas Essinger-Hileman, Yu-Dai Tsai, M. Zemcov, Sara M. Simon, Yi Wang, M. Gerbino, M. Tristram, Emanuele Castorina, Francesco Piacentni, Newburgh, N. Gupta, Mark B. Wise, Michael D. Niemack, Xingang Chen, Huanyuan Shan, Guilherme L. Pimentel, G. Rocha, Hiranya V. Peiris, R. Stompor, J. García-Bellido, Eric R. Switzer, Pavel D. Naselsky, C. Pryke, A. Schillaci, Giuseppe Puglisi, Neelima Sehgal, K. S. Karkare, Yi Zheng, Blake D. Sherwin, S. Matarrese, S. Escoffier, Emmanuel Schaan, Mathew S. Madhavacheril, Andreu Font-Ribera, Marco Raveri, Simon Foreman, J. J. McMahon, C. A. Bischoff, J. E. Carlstrom, K. Koyama, Enrico Pajer, Will Handley, Leonardo Senatore, Benjamin Wallisch, Alberto Nicolis, Olivier Doré, Siavash Yasini, T. M. Crawford, Alexander van Engelen, Daniel Green, Oliver Friedrich, J. Blazek, Christian T. Byrnes, B. D. Wandelt, F. Nati, Christopher M. Hirata, O. Lahav, Alexander Eggemeier, B. Racine, Zhong-Zhi Xianyu, Hee‐Jong Seo, Tzu‐Ching Chang, Behzad Ansarinejad, M. Vargas-Magaña, K. M. Górski, Julián B. Muñoz, Jón E. Gudmundsson, Ningfeng Zhu, Joel Meyers, S. Àvila, Muntazir Abidi, Sam Young, M. Remazeilles, Benjamin L’Huillier, Cora Dvorkin, P. de Bernardis, Daniel Baumann, Kevin Bandura, Raphael Flauger, Lloyd Knox, Suvodip Mukherjee, Hayden Lee, Hamsa Padmanabhan, W. L. K. Wu, Francis-Yan Cyr-Racine, William H. Kinney, Juan Maldacena, Simone Ferraro, C. P. Burgess, Nicholas Battaglia, Mustafa A. Amin, Gong‐Bo Zhao, Savvas M. Koushiappas, Glenn D. Starkman, Kiyoshi W. Masui, Peter Timbie, David Wands, Jean‐Paul Kneib, Matteo Biagetti, Gonzalo A. Palma, Zeeshan Ahmed, Albert Stebbins, A. G. Vieregg, Philip Bull, Guido D’Amico, Matthew McQuinn, A. Challinor, Ashley J. Ross, Ryan E. Keeley, C. Umiltà, William R. Coulton, Levon Pogosian, J. Colin Hill, Pavel Motloch, Chanda Prescod-Weinstein, Sarah Shandera, Erminia Calabrese, M. Tomasi, Yutong Duan, Florian Beutler, Johanna M. Nagy, Cora Uhlemann, R. Armstrong, Suzanne T. Staggs, Liam McAllister, Shaul Hanany, C. Baccigalupi, Matías Zaldarriaga, Misao Sasaki, Mark Trodden, M. Ballardini, Adriaan J. Duivenvoorden, Peter Adshead, A. J. Hawken, Mehrdad Mirbabayi, Anže Slosar, Joanna Dunkley, Dragan Huterer, Julian Borrill, Will J. Percival, Tobias Baldauf, Ely D. Kovetz, Scott Watson, Azadeh Moradinezhad Dizgah, J. Richard Bond, Garrett Goon, Renée Hložek, Christophe Yèche, G. P. Holder, Marilena Loverde, Aritoki Suzuki - California Institute of Technology 2019 cited by 55

Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of galaxies tracing the large scale structure (LSS) of the Universe. One key ingredient that underlies cosmological observables is that the field that sources the observed structure is assumed to be initially Gaussian with high precision. Nevertheless, a minimal deviation from Gaussianityis perhaps the most robust theoretical prediction of models that explain the observed Universe; itis necessarily present even in the simplest scenarios. In addition, most inflationary models produce far higher levels of non-Gaussianity. Since non-Gaussianity directly probes the dynamics in the early Universe, a detection would present a monumental discovery in cosmology, providing clues about physics at energy scales as high as the GUT scale.