F Sgaramella, D Sirghi, L Abbene, F Artibani, M Bazzi, D Bosnar, M Bragadireanu, A Buttacavoli, M Cargnelli, M Carminati, A Clozza, F Clozza, G Deda, R Del Grande, L De Paolis, K Dulski, L Fabbietti, C Fiorini, I Friščić, C Guaraldo, M Iliescu, M Iwasaki, A Khreptak, S Manti, J Marton, M Miliucci, P Moskal, F Napolitano, S Niedźwiecki, H Ohnishi, K Piscicchia, F Principato, A Scordo, M Silarski, F Sirghi, M Skurzok, A Spallone, K Toho, M Tüchler, O Vazquez Doce, C Yoshida, J Zmeskal, C Curceanu
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引用次数: 0
摘要
本文介绍了SIDDHARTA-2实验在DAΦNE对撞机上用1.37 g l-1气态靶测量高子氦-4的新结果。我们首次测量了属于 M 系列的三个跃迁的能量和产率。此外，我们将强相互作用诱导的 2p 电平能移和宽度的统计精度提高了约三倍，获得了气态高昂子氦的最精确测量，并测量了所采用密度下 Lα 转变的产率，为研究高昂子原子转变产率的密度依赖性提供了新的实验输入。
First measurement of kaonic helium-4 M-series transitions
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.
期刊介绍：
Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields.
All aspects of fundamental nuclear physics research, including:
nuclear forces and few-body systems;
nuclear structure and nuclear reactions;
rare decays and fundamental symmetries;
hadronic physics, lattice QCD;
heavy-ion physics;
hot and dense matter, QCD phase diagram.
All aspects of elementary particle physics research, including:
high-energy particle physics;
neutrino physics;
phenomenology and theory;
beyond standard model physics;
electroweak interactions;
fundamental symmetries.
All aspects of nuclear and particle astrophysics including:
nuclear physics of stars and stellar explosions;
nucleosynthesis;
nuclear equation of state;
astrophysical neutrino physics;
cosmic rays;
dark matter.
JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.
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