Main features of the SIDDHARTA-2 apparatus for kaonic deuterium X-ray measurements
- Tüchler, Marlene
- Sirghi, Florin
- Bazzi, M.
- Bosnar, D.
- Bragadireanu, M.
- Carminati, M.
- Cargnelli, M.
- Clozza, A.
- Curceanu, C.
- Deda, G.
- Del Grande, R.
- De Paolis, L.
- Fiorini, C.
- Guaraldo, C.
- Iliescu, M.
- Iwasaki, M.
- King, P.
- Levi Sandri, P.
- Marton, J.
- Miliucci, M.
- Moskal, Paweł
- Napolitano, F.
- Niedźwiecki, Szymon
- Piscicchia, K.
- Scordo, A.
- Sgaramella, F.
- Shi, H.
- Silarski, Michał
- Sirghi, D.
- Skurzok, Magdalena
- Spallone, A.
- Vazquez Doce, O.
- Widmann, E.
- Zmeskal, J.
DOIAbstract
The low-energy, non-perturbative regime of QCD can be studied directly by X-ray spectroscopy of light kaonic atoms. The SIDDHARTA-2 experiment, located at the DAΦNE collider, aims to measure the 2p $\to$ 1s transition in kaonic deuterium for the first time to extract the antikaon-nucleon scattering lengths. This measurement is impeded, inter alia, by the low K$^{-}$d X-ray yield. Hence, several updates have been implemented on the apparatus to increase the signal-to-background ratio, which are discussed in detail in this paper: a lightweight gas target cell, novel Silicon Drift Detectors for the X-ray detection with excellent performance, and a veto system for active background suppression. The experiment has undergone a first preparatory r...
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