ACTA

Kaonic Atoms with the SIDDHARTA-2 Experiment at DAΦNE

F. Napolitano^a, L. Abbene^b, F. Artibani^a, M. Bazzi^a, G. Borghi^c, D. Bosnar^d, M. Bragadireanu^e, A. Buttacavoli^b, M. Carminati^c, M. Cargnelli^f, A. Clozza^a, F. Clozza^a, G. Deda^c, L. De Paolis^a, R. Del Grande^{a, g}, K. Dulski^a, C. Fiorini^c, I. Friščić^d, C. Guaraldo^a, M. Iliescu^a, M. Iwasaki^h, A. Khreptakⁱ, S. Manti^a, J. Marton^f, P. Moskal^{i, j}, S. Niedźwiecki^{i, j}, H. Ohnishi^k, K. Piscicchia^{a, l}, F. Principato^b, A. Scordo^a, F. Sgaramella^a, D. Sirghi^{a, e, l}, F. Sirghi^{a, e}, M. Skurzok^{i, j}, M. Silarski^{i, j}, A. Spallone^a, K. Toho^k, L.G. Toscano^c, M. Tüchler^f, O. Vazquez Doce^a, J. Zmeskal^f, C. Curceanu^a
^aLaboratori Nazionali di Frascati dell'INFN, Via E. Fermi 54, Italy
^bDipartimento di Fisica e Chimica - Emilio Segrè, Universitá di Palermo, Viale Delle Scienze, Edificio 18, Palermo, Italy
^cPolitecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, Piazza L. Da Vinci 32, Milano, Italy and INFN Sezione di Milano, Via Celoria 16, Milano, Italy
^dDepartment of Physics, Faculty of Science, University of Zagreb, Bijenicka cesta 32, Zagreb, Croatia
^eHoria Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Reactorului 30, Magurele, Romania
^fStefan-Meyer-Institut für Subatomare Physik, Dominikanerbastei 16, Vienna, Austria
^gPhysik Department E62, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
^hRIKEN, 2-1 Hirosawa, Wako, Saitama, Tokyo, Japan
ⁱFaculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, Kraków, Poland
^jCentre for Theranostics, Jagiellonian University, Kopernika 40, Kraków, Poland
^kResearch Center for Electron Photon Science (ELPH), Tohoku University, 1-2-2 Mikamine, Sendai, Japan
^lCentro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche ``Enrico Fermi'', Via Panisperna 89A, Roma, Italy

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The SIDDHARTA-2 experiment aiming at measuring for the first time the X-ray transitions in kaonic deuterium, has successfully completed its 2024 physics run at the DAΦNE collider of the INFN Laboratori Nazionali di Frascati. This work presents an overview of the scientific and technical achievements of SIDDHARTA-2 so far, including the most precise measurement of kaonic helium-4 L_α transitions and yields in gas, the observation of the kaonic helium-4 M-series transitions, and the measurement of high-n transitions in kaonic carbon, oxygen, nitrogen, and aluminium. The results of these measurements are discussed in the context of the kaonic atoms physics program at DAΦNE, including future prospects within the EXKALIBUR proposal.

DOI:10.12693/APhysPolA.146.669
topics: kaonic atoms, silicon drift detectors, kaonic deuterium, kaonic helium-4