1 Cosmic-ray Antinuclei and Dark Matter 1

The origin of dark matter is a driving question of modern physics. Low-energy antideuterons provide a “smoking gun” signature of dark matter annihilation or decay, essentially free of astrophysical background. Low-energy antiprotons are a vital partner for this analysis, and low-energy antihelium could provide further discovery space for new physics. In the coming decade, AMS-02 will continue accumulating the large statistics and systematic understanding necessary for it to probe rare antinuclei signatures, and GAPS, which is the first experiment optimized specifically for low-energy cosmic antinuclei, will begin several Antarctic balloon campaigns. The connection of cosmic-ray antinuclei and dark matter is reviewed and the outlook in light of experimental progress is presented. Endorsers: Steve Ahlen, Steve Barwick, Ralph Bird, Mathieu Boudaud, Marco Cirelli, Adam Coogan, Mingyang Cui, Amaresh Datta, Fiorenza Donato,Carmelo Evoli, Laura Fabbietti, Nicolao Fornengo, Marek Gazdzicki, Diego Mauricio Gomez Coral, Dan Hooper, Alessandro Ibarra, Michael Kachelriess, Alexander Kalweit, Michael Korsmeier, Masayoshi Kozai, Sujie Lin, David Maurin, Arturo Menchaca-Rocha, Samuel Adam Isaac Mognet, Igor V. Moskalenko, Li Nan, Kenny C. Y. Ng, Alberto Oliva, Sergey Ostapchenko, Tanguy Pierog, Vivian Poulin, Stefano Profumo, Sean Quinn, Are Raklev, Marco Regis, Alberto Ribon, Pierre Salati, Pasquale D. Serpico, Achim Stoessl, Greg Tarle, Tim M.P. Tait, Nicola Tomassetti, Pierro Ullio, Michael Unger, Alfredo Urbano, Vladimir Uzhinsky, Manuela Vecchi, Andrea Vittino, 1 ar X iv :1 90 4. 05 93 8v 1 [ as tr oph .H E ] 1 1 A pr 2 01 9 Christoph Weniger, Scott Wakely, Martin Winkler, Dennis Wright, Mengjiao Xiao, Tetsuya Yoshida 10 Boston University, 11 University of California Irvine, 12 Laboratoire de Physique Théorique et Hautes Energies, 13 CNRS-Sorbonne Université, 14 University of Amsterdam, 15 Purple Mountain Observatory, 16 University of Torino, 17 Gran Sasso Science Institute, 18 Technische Universität München, 19 Istituto Nazionale di Fisica Nucleare, 20 Goethe-University Frankfurt am Main, Jan Kochanowski University Kielce, 21 Universidad Nacional Autónoma de México, 22 Fermilab, 23 University of Chicago, 24 Norges teknisk-naturvitenskaplige universitet , 25 CERN, 26 University of Turin, 27 RWTH Aachen University, 28 Institute of High Energy Physics, 29 Laboratoire de Physique Subatomique et Cosmologie, 30 Pennsylvania State University, 31 Stanford University, 32 Chinese Academy of Sciences, 33 Weizmann Institute of Science 34 Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas 35 Goethe-University, 36 Karlsruhe Institute of Technology, 37 Université de Savoie, 38 Johns Hopkins University, 39 University of California Santa Cruz, 40 University of Oslo, 41 Laboratoire d’Annecy-le-Vieux de Physique Théorique, 42 University of Michigan, 43 Perugia University, 44 Scuola Internazionale Superiore di Studi Avanzati, 45 Joint Institute for Nuclear Research, 46 University of Groningen, 47 University of Säo Paulo, 48 Stockholm University