New measurements of kaonic helium-4 L-series X-rays yields in gas with the SIDDHARTINO setup

Autor(en)

D. L. Sirghi, H. Shi, C. Guaraldo, F. Sgaramella, C. Amsler, M. Bazzi, D. Bosnar, A. M. Bragadireanu, M. Carminati, M. Cargnelli, A. Clozza, G. Deda, L. De Paolis, R. Del Grande, L. Fabbietti, C. Fiorini, M. Iliescu, M. Iwasaki, J. Marton, M. Miliucci, P. Moskal, F. Napolitano, S. Niedzwiecki, H. Ohnishi, K. Piscicchia, Y. Sada, A. Scordo, M. Silarski, F. Sirghi, M. Skurzok, A. Spallone, K. Toho, M. Tüchler, O. Vazquez Doce, J. Zmeskal, C. Yoshida, C. Curceanu

Abstrakt

The L-series X-rays transitions of the kaonic helium-4 exotic atom were measured by SIDDHARTINO, the reduced configuration of the SIDDHARTA-2 experiment, at the DAΦNE collider of INFN-LNF, with gaseous ⁴He targets at densities of 1.90 g/l and 0.82 g/l, corresponding to 1.5% and 0.66%, respectively, of the liquid helium-4 density. The absolute yields for the L_α transition are determined to be 0.15 ±0.03 and 0.12 ±0.03, for the two target densities. The yields for the L_β and L_γ transitions are presented relatively to that of the L_α transition. These results are compatible with the yields measured by the SIDDHARTA experiment at the densities of 1.65 g/l and 2.15 g/l and contribute to refine the cascade models describing the de-excitation of kaonic atoms as function of density.

Organisation(en)

Fakultät für Physik

Externe Organisation(en)

INFN - Laboratori Nazionali Di Frascati, Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Österreichische Akademie der Wissenschaften (ÖAW), University of Zagreb, Politecnico di Milano, Istituto Nazionale di Fisica Nucleare (INFN), Milano, Technische Universität München, Jagiellonian University in Krakow, Tohoku University, RIKEN

Journal

Nuclear Physics A

Band

1029

Anzahl der Seiten

10

ISSN

0375-9474

DOI

https://doi.org/10.1016/j.nuclphysa.2022.122567

Publikationsdatum

01-2023

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/258e39eb-94d1-45fd-b1eb-63bec1b42fae