First measurement of kaonic helium-4 M-series transitions
- Authors: Sgaramella F.; Sirghi D.; Abbene L.; Artibani F.; Bazzi M.; Bosnar D.; Bragadireanu M.; Buttacavoli A.; Cargnelli M.; Carminati M.; Clozza A.; Clozza F.; Deda G.; Del Grande R.; De Paolis L.; Dulski K.; Fabbietti L.; Fiorini C.; Friscic I.; Guaraldo C.; Iliescu M.; Iwasaki M.; Khreptak A.; Manti S.; Marton J.; Miliucci M.; Moskal P.; Napolitano F.; Niedzwiecki S.; Ohnishi H.; Piscicchia K.; Principato F.; Scordo A.; Silarski M.; Sirghi F.; Skurzok M.; Spallone A.; Toho K.; Tuchler M.; Vazquez Doce O.; Yoshida C.; Zmeskal J.; Curceanu C.
- Publication year: 2024
- Type: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/634431
Abstract
In this paper we present the results of a new kaonic helium-4 measurement with a 1.37 g l−1 gaseous target by the SIDDHARTA-2 experiment at the DAΦNE collider. We measured, for the first time, the energies and yields of three transitions belonging to the M-series. Moreover, we improved by a factor about three, the statistical precision of the 2p level energy shift and width induced by the strong interaction, obtaining the most precise measurement for gaseous kaonic helium, and measured the yield of the Lα transition at the employed density, providing a new experimental input to investigate the density dependence of kaonic atoms transitions yield.