Abstract

The workshop “Shedding light on X17” brings together scientists looking for the existence of a possible new light particle, often referred to as X17. This hypothetical particle can explain the resonant structure observed at ∼ 17 MeV in the invariant mass of electron-positron pairs, produced after excitation of nuclei such as 8Be and 4He by means of proton beams at the Atomki Laboratory in Debrecen. The purpose of the workshop is to discuss implications of this anomaly, in particular theoretical interpretations as well as present and future experiments aiming at confirming the result and/or at providing experimental evidence for its interpretation.

Details

Title
Shedding light on X17: community report
Author
Alves, Daniele S. M. 1 ; Barducci, Daniele 2 ; Cavoto, Gianluca 2 ; Darmé, Luc 3 ; Delle Rose, Luigi 4 ; Doria, Luca 5 ; Feng, Jonathan L. 6 ; Frankenthal, André 7 ; Gasparian, Ashot 8 ; Goudzovski, Evgueni 9 ; Gustavino, Carlo 10 ; Khalil, Shaaban 11 ; Kozhuharov, Venelin 12 ; Krasznahorkay, Attila J. 13 ; Marchi, Tommaso 14 ; Meucci, Manuel 2 ; Miller, Gerald A. 15 ; Moretti, Stefano 16 ; Nardecchia, Marco 2 ; Nardi, Enrico 17 ; Natal da Luz, Hugo 18 ; Organtini, Giovanni 2 ; Papa, Angela 19 ; Perrevoort, Ann-Kathrin 20 ; Petousis, Vlasios 18 ; Piperno, Gabriele 21 ; Raggi, Mauro 2   VIAFID ORCID Logo  ; Renga, Francesco 10 ; Schwendimann, Patrick 19 ; Sýkora, Rudolf 18 ; Toni, Claudio 2 ; Valente, Paolo 10 ; Voena, Cecilia 10 ; Wong, Cheuk-Yin 22 ; Zhang, Xilin 23 

1  Los Alamos National Laboratory, Theoretical Division, Los Alamos, USA (GRID:grid.148313.c) (ISNI:0000 0004 0428 3079) 
2  Dip. di Fisica Sapienza Univ., Rome, Italy (GRID:grid.7841.a); INFN sez. Roma, Rome, Italy (GRID:grid.6045.7) (ISNI:0000 0004 1757 5281) 
3  Institut de Physique des 2 Infinis de Lyon (IP2I), UMR5822, CNRS/IN2P3, Villeurbanne Cedex, France (GRID:grid.462474.7) (ISNI:0000 0001 2153 961X) 
4  Institut de Fisica d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Bellaterra, Spain (GRID:grid.435462.2) (ISNI:0000 0004 5930 4594); Università della Calabria, Dipartimento di Fisica, Arcavacata di Rende, Italy (GRID:grid.7778.f) (ISNI:0000 0004 1937 0319) 
5  Johannes Gutenberg-Universität Mainz, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000 0001 1941 7111) 
6  University of California, Department of Physics and Astronomy, Los Angeles, USA (GRID:grid.19006.3e) (ISNI:0000 0000 9632 6718) 
7  Princeton University, Department of Physics, Princeton, USA (GRID:grid.16750.35) (ISNI:0000 0001 2097 5006) 
8  North Carolina A &T State University, Greensboro, USA (GRID:grid.261037.1) (ISNI:0000 0001 0287 4439) 
9  University of Birmingham, School of Physics and Astronomy, Birmingham, UK (GRID:grid.6572.6) (ISNI:0000 0004 1936 7486) 
10  INFN sez. Roma, Rome, Italy (GRID:grid.6045.7) (ISNI:0000 0004 1757 5281) 
11  Zewail City of Science and Technology, Center for Fundamental Physics, Giza, Egypt (GRID:grid.440881.1) (ISNI:0000 0004 0576 5483) 
12  Sofia University, Faculty of Physics, Sofia, Bulgaria (GRID:grid.11355.33) (ISNI:0000 0001 2192 3275) 
13  Institute for Nuclear Research (Atomki), Debrecen, Hungary (GRID:grid.418861.2) (ISNI:0000 0001 0674 7808) 
14  INFN-Laboratori Nazionali di Legnaro, Legnaro, Italy (GRID:grid.466875.e) (ISNI:0000 0004 1757 5572) 
15  University of Washington, Department of Physics, Seattle, USA (GRID:grid.34477.33) (ISNI:0000000122986657) 
16  University of Southampton, School of Physics and Astronomy, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297) 
17  Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Frascati, Italy (GRID:grid.463190.9) (ISNI:0000 0004 0648 0236) 
18  Czech Technical University in Prague, Institute of Experimental and Applied Physics, Prague, Czech Republic (GRID:grid.6652.7) (ISNI:0000000121738213) 
19  Paul Scherrer Institute, Würenlingen, Switzerland (GRID:grid.5991.4) (ISNI:0000 0001 1090 7501) 
20  Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, Karlsruhe, Germany (GRID:grid.7892.4) (ISNI:0000 0001 0075 5874) 
21  Dip. di Fisica Sapienza Univ., Rome, Italy (GRID:grid.7841.a) 
22  Oak Ridge National Laboratory, Physics Division, Oak Ridge, USA (GRID:grid.135519.a) (ISNI:0000 0004 0446 2659) 
23  Michigan State University, Facility for Rare Isotope Beams, East Lansing, USA (GRID:grid.17088.36) (ISNI:0000 0001 2150 1785) 
Pages
230
Publication year
2023
Publication date
Mar 2023
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-023-11271-x
ProQuest document ID
2806677138
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.