Siddhartino在Daφne对撞机的气体中进行了新的Kaonic氦气测量

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Siddhartino在Daφne对撞机的气体中进行了新的Kaonic氦气测量

A new kaonic helium measurement in gas by SIDDHARTINO at the DAΦNE collider

论文作者

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

论文摘要

Infn-LNF的Daφne撞机的Siddhartino实验，用于Siddharta-2实验的飞行员，旨在实现Kaonic氘过渡到基本水平的测量，已成功地得出了结论。本文报告了这项运行的主要结果，包括优化设备的各种组件，其中通过测量Kaonon氦转变到2P水平，将其降级器最大化，以最大化目标内部的Kaons的分数。获得的移位值和宽度值为ε_2p= e_exp-e_e.m = 0.2 {\ pm} 2.5（stat）{\ pm} 2（syst）2（syst）EV和γ_2p= 8 {\ pm} 10 ev（stat）。尤其是对移位的新测量，是气态目标最精确的测量值，有望有助于更好地理解低能量下的Kaon-Nuclei相互作用。

The SIDDHARTINO experiment at the DAΦNE Collider of INFN-LNF, the pilot run for the SIDDHARTA-2 experiment which aims to perform the measurement of kaonic deuterium transitions to the fundamental level, has successfully been concluded. The paper reports the main results of this run, including the optimization of various components of the apparatus, among which the degrader needed to maximize the fraction of kaons stopped inside the target, through measurements of kaonic helium transitions to the 2p level. The obtained shift and width values are ε_2p = E_exp-E_e.m = 0.2 {\pm} 2.5(stat) {\pm} 2(syst) eV and Γ_2p = 8 {\pm} 10 eV (stat), respectively. This new measurement of the shift, in particular, represents the most precise one for a gaseous target and is expected to contribute to a better understanding of the kaon-nuclei interaction at low energy.

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