Engel, KristiLewis, TiffanyMuzio, Marco SteinVenters, Tonia M.Negro, Michelaet al2022-04-192022-04-192022-03-18https://doi.org/10.48550/arXiv.2203.10074http://hdl.handle.net/11603/24552Editors: Kristi Engel , , Tiffany Lewis , Marco Stein Muzio Tonia M. Venters; Contributors: Kristi Engel, Tiffany Lewis, Marco Stein Muzio, Tonia M. Venters, Markus Ahlers, Andrea Albert, Alice Allen, Hugo Alberto Ayala Solares, Samalka Anandagoda, Thomas Andersen, Sarah Antier, David Alvarez-Castillo, Olaf Bar, Dmitri Beznosko, Łukasz Bibrzyck, Adam Brazier, Chad Brisbois, Robert Brose, Duncan A. Brown, Mattia Bulla, J. Michael Burgess, Eric Burns, Cecilia Chirenti, Stefano Ciprini, Roger Clay, Michael W. Coughlin, Austin Cummings, Valerio D'Elia, Shi Dai, Tim Dietrich, Niccolò Di Lalla, Brenda Dingus, Mora Durocher, Johannes Eser, Miroslav D. Filipović, Henrike Fleischhack, Francois Foucart, Michał Frontczak, Christopher L. Fryer, Ronald S. Gamble, Dario Gasparrini, Marco Giardino, Jordan Goodman, J. Patrick Harding, Jeremy Hare, Kelly Holley-Bockelmann, Piotr Homola, Kaeli A. Hughes, Brian Humensky, Yoshiyuki Inoue, Tess Jaffe, Oleg Kargaltsev, Carolyn Kierans, James P. Kneller, Cristina Leto, Fabrizio Lucarelli, Humberto Martínez-Huerta, Alessandro Maselli, Athina Meli, Patrick Meyers, Guido Mueller, Zachary Nasipak, Michela Negro, Michał Niedźwiecki, Scott C. Noble, Nicola Omodei, Stefan Oslowski, Matteo Perri, Marcin Piekarczyk, Carlotta Pittori, Gianluca Polenta, Remy L. Prechelt, Giacomo Principe, Judith Racusin, Krzysztof Rzecki, Rita M. Sambruna, Joshua E. Schlieder, David Shoemaker, Alan Smale, Tomasz Sośnicki, Robert Stein, Sławomir Stuglik, Peter Teuben, James Ira Thorpe, Joris P. Verbiest, Franceso Verrecchia, Salvatore Vitale, Zorawar Wadiasingh, Tadeusz Wibig, Elijah Willox, Colleen A. Wilson-Hodge, Joshua Wood, Hui Yang, Haocheng Zhang Conference: Submitted to the Proceedings of the US Community Study on the Future of Particle Physics (Snowmass 2021)The last decade has brought about a profound transformation in multimessenger science. Ten years ago, facilities had been built or were under construction that would eventually discover the nature of objects in our universe could be detected through multiple messen gers. Nonetheless, multimessenger science was hardly more than a dream. The rewards for our foresight were finally realized through IceCube’s discovery of the diffuse astrophys ical neutrino flux, the first observation of gravitational waves by LIGO, and the first joint detections in gravitational waves and photons and in neutrinos and photons. Today we live in the dawn of the multimessenger era. The successes of the multimessenger campaigns of the last decade have pushed multi messenger science to the forefront of priority science areas in both the particle physics and the astrophysics communities. Multimessenger science provides new methods of testing fundamental theories about the nature of matter and energy, particularly in conditions that are not reproducible on Earth. This white paper will present the science and facilities that will provide opportunities for the particle physics community renew its commitment and maintain its leadership in multimessenger science.175 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domain Mark 1.0Text