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Wyświetlanie 1-10 z 78
Tytuł:
Revisiting the charged kaon mass
Autorzy:
Cargnelli, M.
Scordo, A.
Bazzi, M.
Sirghi, D. L.
Piscicchia, K.
Del Grande, R.
Žugec, P.
Makek, M.
Guaraldo, C.
Miliucci, M.
Curceanu, C.
Bosnar, D.
De Paolis, L.
Skurzok, Magdalena
Zmeskal, J.
Tüchler, M.
Marton, J.
Sirghi, F.
Iliescu, M.
Clozza, A.
Opis:
The precision of the charged kaon mass is an order of magnitude worse than the precision of the charged pion mass mainly due to two inconsistent measurements. We plan to improve this precision by determining the charged kaon mass with the requested accuracy in the measurements of X-ray transitions in kaonic atoms of selected solid targets with the HPGe detector at DAΦNE in Laboratori Nazionali di Frascati, Italy. The measurements will be performed in parallel with SIDDHARTA-2 measurements of X-ray transitions in gaseous targets. The status of the preparation of the measurements will be presented.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Kaonic atoms measurements at the DA$\Phi$NE Collider
Autorzy:
Shi, H.
Niedźwiecki, Szymon
Guaraldo, C.
Baniahmad, A.
Berucci, C.
Miliucci, M.
Silarski, Michał
Skurzok, Magdalena
Widmann, E.
Sirghi, D.
Ghio, F.
Piscicchia, K.
Bragadireanu, M.
Zmeskal, J.
Okada, S.
Fabbietti, L.
Scordo, A.
Tatsuno, H.
Martona, J.
Bellotti, G.
Iliescu, M.
Curceanu, C.
Cargnelli, M.
Pietreanu, D.
Iwasaki, M.
Bazzi, M.
Spallone, A.
Bosnar, D.
Moskal, Paweł
Amirkhani, A.
Sirghi, F.
Fiorini, C.
Opis:
The DAFNE electron-positron collider of the Laboratori Nazionali di Frascati of INFN is a worldwide unique low-energy kaon source, which is being used to produce and to study kaonic atoms by the SIDDHARTA collaboration. The X-ray measurements of kaonic atoms play an important role for understanding the low-energy QCD in the strangeness sector. Significant achievements have been obtained by the SIDDHARTA experiment, among which: the most precise kaonic hydrogen measurement of the 1s level shift and width induced by the presence of the strong interaction; an upper limit of the X-ray yield for kaonic deuterium K-series; the accurate measurement of the 2p level shift and width of kaonic helium-4 and kaonic helium-3; yields of various light kaonic atoms transitions. Using the experience gained with SIDDHARTA experiment, the first kaonic deuterium measurement is in preparation in the framework of the SIDDHARTA-2 experiment with the goal to determine the antikaon-nucleon isospin dependent scattering lengths, which is possible only by combining the K-p and the upcoming K-d results. An overview of the experimental results of SIDDHARTA and an outlook to SIDDHARTA-2 experiments are given in this paper.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Unprecedented studies of the low-energy negatively charged kaons interactions in nuclear matter by AMADEUS
Autorzy:
Shi, H.
Guaraldo, C.
Berucci, C.
Clozza, A.
Skurzok, Magdalena
Widmann, E.
Sirghi, D.
Ghio, F.
Piscicchia, K.
D'Uffizi, A.
Vidal, A. Romero
Marton, J.
Doce, O. Vazquez
Zmeskal, J.
Lener, M. Poli
Fabbietti, L.
Scordo, A.
Tucakovic, I.
Iliescu, M.
Quaglia, R.
Sbardella, E.
Curceanu, C.
Cargnelli, M.
Pietreanu, D.
Bazzi, M.
Sandri, P. Levi
Bosnar, D.
Bragadireanu, A. M.
Sirghi, F.
Fiorini, C.
Opis:
The AMADEUS experiment aims to provide unique quality data of $K^{−}$ hadronic interactions in light nuclear targets, in order to solve fundamental open questions in the non-perturbative strangeness QCD sector, like the controversial nature of the $\Lambda$ (1405) state, the yield of hyperon formation below threshold, the yield and shape of multi-nucleon $K^{−}$ absorption, processes which are intimately connected to the possible existence of exotic antikaon multi-nucleon clusters. AMADEUS takes advantage of the DA$\Phi$NE collider, which provides a unique source of monochromatic low-momentum kaons and exploits the KLOE detector as an active target, in order to obtain excellent acceptance and resolution data for $K^{−}$ nuclear capture on $H, ^{4}He, ^{9}Be$ and $^{12}C$, both at-rest and in-flight. During the second half of 2012, a successful data taking was performed with a dedicated pure carbon target implemented in the central region of KLOE, providing a high statistic sample of pure at-rest $K^{−}$ nuclear interactions. For the future, dedicated setups involving cryogenic gaseous targets are under preparation.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The SIDDHARTA-2 calibration method for high precision kaonic atoms x-ray spectroscopy measurements
Autorzy:
Guaraldo, C.
Shi, H.
Deda, G.
Scordo, A.
Curceanu, C.
Fiorini, C.
Bragadireanu, M.
Spallone, A.
King, P.
Carminati, M.
Zmeskal, J.
Silarski, Michał
Tüchler, M.
Sgaramella, F.
Cargnelli, M.
Marton, J.
Piscicchia, K.
Bazzi, M.
De Paolis, L.
Miliucci, M.
Moskal, Paweł
Niedźwiecki, Szymon
Skurzok, Magdalena
Del Grande, R.
Iliescu, M.
Sirghi, D.
Levi Sandri, P.
Sirghi, F.
Napolitano, F.
Iwasaki, M.
Clozza, A.
Bosnar, D.
Opis:
The SIDDHARTA-2 experiment at the DAΦNE collider aims to perform the first kaonic deuterium x-ray transitions to the fundamental level measurement, with a systematic error at the level of a few eV. To achieve this challenging goal the experimental apparatus is equipped with 384 Silicon Drift Detectors (SDDs) distributed around its cryogenic gaseous target. The SDDs developed by the SIDDHARTA-2 collaboration are suitable for high precision kaonic atoms spectroscopy, thanks to their high energy and time resolutions combined with their radiation hardness. The energy response of each detector must be calibrated and monitored to keep the systematic error, due to processes such as gain fluctuations, at the level of 2–3 eV. This paper presents the SIDDHARTA-2 calibration method which was optimized during the preliminary phase of the experiment in the real background conditions of the DAΦNE collider, which is a fundamental tool to guarantee the high precision spectroscopic performances of the system over long periods of data taking, as that required for the kaonic deuterium measurement.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Towards the first kaonic deuterium measurement with the SIDDHARTA-2 experiment at DAΦNE
Autorzy:
Shi, H.
Sirghi, F.
Niedźwiecki, Szymon
Fiorin, C.
Guaraldo, C.
Sgaramella, F.
Miliucci, M.
Clozza, A.
King, P.
Skurzok, Magdalena
Carminati, M.
Sirghi, D.
Piscicchia, K.
Bragadireanu, M.
De Paolis, L.
Marton, J.
Zmeskal, J.
Scordo, A.
Deda, D.
Iliescu, M.
Tüchler, M.
Curceanu, C.
Levi Sandri, P.
Cargnelli, M.
Iwasaki, M.
Bazzi, M.
Napolitano, F.
Spallone, A.
Moskal, Paweł
Silarski, Michał
Del Grande, R.
Bosnar, D.
Opis:
The SIDDHARTA-2 experiment is going to perform the longawaited high precision X-ray measurement of kaonic deuterium, obtaining for the first time the values of the shift and the width induced by the strong interaction on the fundamental level. By combining this unprecedented result with the analogous kaonic hydrogen measurement performed by the SIDDHARTA experiment, it will be possible to extract the isospin-dependent antikaon-nucleon scattering lengths, providing direct information on the Quantum Chromodynamics (QCD) in the non-perturbative Chromodynamics (QCD) in the non-perturbative regime in the strangeness sector. This paper describes the SIDDHARTA-2 experiment, presently installed at the DAΦNE collider of Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali di Frascati, and the results obtained during the kaonic helium run, preparatory for the kaonic deuterium data taking campaign planned for 2022.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 78

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