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Feebly-interacting particles: FIPs 2022 workshop report

Antel, C., Battaglieri, M., Beacham, J., Boehm, C., Buchmüller, O., Calore, F., Carenza, P., Chauhan, B., Cladè, P., Coloma, P., Crivelli, P., Dandoy, V., Darmé, L., Dey, B., Deppisch, F. F., De Roeck, A., Drewes, M., Echenard, B., Flambaum, V. V., Foldenauer, P., Gatti, C., Giannotti, M., Golutvin, A., Gonzalez-Garcia, M. C., Gori, S., Goudzovski, E., Granelli, A., Grote, H. ORCID:, Guellati-Khelifa, S., Hajer, J., Harris, P., Hearty, C., Heuchel, D., Hostert, M., Junius, S., Kahlhoefer, F., Klaric, J., Kling, F., Klose, P., Knolle, J., Kopp, J., Kwon, O., Lantwin, O., Lanfranchi, G., Li, L., Lindner, A., Lopez-Pavon, J., Marocco, J., Martin, J. W., Middleton, S., Milstead, S., Oceano, I., O’Hare, C. A. J., Paoloni, A., Pascoli, S., Petcov, S. T., Pospelov, M., Pöttgen, R., Raggi, M., Ripellino, G., Samsonov, I. B., Sandner, S., Söldner-Rembold, S., Shelton, J., Song, N., Sun, C., Stadnik, Y. V., Tastet, J.-L., Toro, N., Tran, N., Trevisani, N., Ulmer, S., Urrea, S., Velghe, B., Wallisch, B., Wong, Y. Y. Y., Zorbilmez, C. and Zurek, K. 2023. Feebly-interacting particles: FIPs 2022 workshop report. The European Physical Journal C 83 (12) , 1122. 10.1140/epjc/s10052-023-12168-5

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Particle physics today faces the challenge of explaining the mystery of dark matter, the origin of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent fine-tuning of the electro-weak scale, and many other aspects of fundamental physics. Perhaps the most striking frontier to emerge in the search for answers involves new physics at mass scales comparable to familiar matter, below the GeV-scale, or even radically below, down to sub-eV scales, and with very feeble interaction strength. New theoretical ideas to address dark matter and other fundamental questions predict such feebly interacting particles (FIPs) at these scales, and indeed, existing data provide numerous hints for such possibility. A vibrant experimental program to discover such physics is under way, guided by a systematic theoretical approach firmly grounded on the underlying principles of the Standard Model. This document represents the report of the FIPs 2022 workshop, held at CERN between the 17 and 21 October 2022 and aims to give an overview of these efforts, their motivations, and the decadal goals that animate the community involved in the search for FIPs.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Additional Information: License information from Publisher: LICENSE 1: URL:, Type: open-access
Publisher: SpringerOpen
ISSN: 1434-6044
Date of First Compliant Deposit: 13 December 2023
Date of Acceptance: 6 October 2023
Last Modified: 13 Dec 2023 10:45

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