scholarly journals Kaonic atoms measurements at the DAΦNE collider: the SIDDHARTA-2 experiment

2022 ◽  
Vol 258 ◽  
pp. 07006
Author(s):  
Catalina Curceanu ◽  
Marco Miliucci ◽  
Massimiliano Bazzi ◽  
Damir Bosnar ◽  
Mario Bragadireanu ◽  
...  
Keyword(s):  
Low Energy ◽  
Kaonic Hydrogen ◽  
Nucleon Interaction ◽  
X Ray ◽  
Kaonic Atoms ◽  
Kaonic Deuterium ◽  
Model Independent ◽  
Energy Quantum ◽  
Scattering Lengths ◽  
The One

The X-ray spectroscopy measurements of light kaonic atoms’ deexcitation towards the fundamental level provide unique information on the low-energy Quantum ChromoDynamics (QCD) in the strangeness sector, being a direct probe of the kaon/nucleon interaction at threshold, unobtainable through the scattering experiments. In this framework, the SIDDHARTA-2 collaboration is going to perform the first kaonic deuterium 2p → 1s transition measurement at the DAΦNE collider of Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali di Frascati. Combining this measurement with the kaonic hydrogen one performed by SIDDHARTA in 2009 it will be possible to obtain, in a model-independent way, the isospin-dependent antikaon-nucleon scattering lengths. The paper introduces the SIDDHARTA-2 setup, an upgraded version with respect to the one used for the kaonic hydrogen measurement, dedicated to the ambitious kaonic deuterium measurement, together with the preliminary results obtained during the kaonic helium run, preparatory for the SIDDHARTA-2 data taking campaign.

scholarly journals The kaonic atoms research program at DAΦNE: from SIDDHARTA to SIDDHARTA-2

2018 ◽  
Vol 181 ◽  
pp. 01004 ◽  
Author(s):  
A. Scordo ◽  
A. Amirkhani ◽  
M. Bazzi ◽  
G. Bellotti ◽  
C. Berucci ◽  
...  
Keyword(s):  
Energy Shift ◽  
Theoretical Work ◽  
Research Field ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
Nucleon Scattering ◽  
X Ray ◽  
Kaonic Atoms ◽  
Kaonic Deuterium ◽  
Scattering Lengths

The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms, in which one electron is replaced by a negatively charged kaon, is a unique tool to provide precise information on this interaction; the energy shift and the broadening of the low-lying states of such atoms, induced by the kaon-nucleus hadronic interaction, can be determined with high precision from the atomic X-ray spectroscopy, and this experimental method provides unique information to understand the low energy kaon-nucleus interaction at the production threshold. The lightest atomic systems, like the kaonic hydrogen and the kaonic deuterium deliver, in a model-independent way, the isospin-dependent kaon-nucleon scattering lengths. The most precise kaonic hydrogen measurement to-date, together with an exploratory measurement of kaonic deuterium, were carried out in 2009 by the SIDDHARTA collaboration at the DAΦNE electron-positron collider of LNF-INFN, combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and very precise X-ray detectors, like the Silicon Drift Detectors. The SIDDHARTA results triggered new theoretical work, which achieved major progress in the understanding of the low-energy strong interaction with strangeness reflected by the antikaon-nucleon scattering lengths calculated with the antikaon-proton amplitudes constrained by the SIDDHARTA data. The most important open question is the experimental determination of the hadronic energy shift and width of kaonic deuterium; presently, a major upgrade of the setup, SIDDHARTA-2, is being realized to reach this goal. In this paper, the results obtained in 2009 and the proposed SIDDHARTA-2 upgrades are presented.

scholarly journals Kaonic Atoms to Investigate Global Symmetry Breaking

Symmetry ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 547 ◽  
Author(s):  
Catalina Curceanu ◽  
Carlo Guaraldo ◽  
Diana Sirghi ◽  
Aidin Amirkhani ◽  
Ata Baniahmad ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Precise Measurement ◽  
Relative Energy ◽  
Kaonic Hydrogen ◽  
Global Symmetry ◽  
Nucleus Interaction ◽  
Kaonic Atoms ◽  
Kaonic Deuterium ◽  
Energy Quantum ◽  
Scattering Lengths

Kaonic atoms measure the antikaon-nucleus interaction at almost zero relative energy, allowing one to determine basic low-energy quantum chromodynamics (QCD) quantities, namely, the antikaon-nucleon ( K ¯ N) scattering lengths. The latter are important for extracting the sigma terms which are built on the symmetry breaking part of the Hamiltonian, thereby providing a measure of chiral and SU(3) symmetries breaking. After discussing the sigma terms and their relations to the kaonic atoms, we describe the most precise measurement in the literature of kaonic hydrogen, performed at LNF-INFN by the SIDDHARTA experiment. Kaonic deuterium is still to be measured, and two experiments are planned. The first, SIDDHARTA-2 at LNF-INFN was installed on DA Φ NE in spring 2019 and will collect data in 2020. The second, E57 at J-PARC, will become operative in 2021.

scholarly journals Spectroscopy of kaonic atoms at DAFNE and J-PARC

2019 ◽  
Vol 199 ◽  
pp. 03004
Author(s):  
J. Marton ◽  
A. Amirkhan ◽  
A. Baniahmad ◽  
M. Bazzi ◽  
G. Bellotti ◽  
...  
Keyword(s):  
Strong Interaction ◽  
Energy Shift ◽  
Research Field ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
Kaonic Atoms ◽  
Electron Positron ◽  
Kaonic Deuterium ◽  
Active Research ◽  
Scattering Lengths

The interaction of antikaons (K−) with nucleons and nuclei in the low-energy regime represents a very active research field in hadron physics. A unique and rather direct experimental access to the antikaon-nucleon scattering lengths is provided by precision X-ray spectroscopy of transitions in low-lying states in the lightest kaonic atoms (i.e. kaonic hydrogen and deuterium). In the SIDDHARTA experiment at the electron-positron collider DAFNE of LNFINFN we measured the most precise values of the strong interaction observables in conic hydrogen. The strong interaction on the 1s ground state of the electromagnetically bound K-p atom causes an energy shift and broadening of the 1s state. SIDDHARTA will extend the spectroscopy to kaonic deuterium to get access to the antikaon-neutron interaction and thus the isospin dependent scattering lengths. At J-PARC a kaon beam is used in a complementary experiment with a different setup for spectroscopy of kaonic deuterium atoms. The talk will give an overview of the of the upcoming experiments SIDDHARTA and the complementary experiment at J-PARC.Furthermore, the implications of the experiments for the theory of low-energy strong interaction with strangeness will be discussed.

Kaonic hydrogen X-rays — experiments at DAFNE

2007 ◽  
Vol 85 (5) ◽  
pp. 479-485 ◽  
Author(s):  
M Cargnelli ◽  
T Ishiwatari ◽  
P Kienle ◽  
J Marton ◽  
E Widmann ◽  
...  
Keyword(s):  
Chiral Symmetry Breaking ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
X Rays ◽  
Large Area ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Research Experiment ◽  
Scattering Lengths ◽  
Excellent Energy Resolution

At the DAΦNE electron–positron collider of Laboratori Nazionali di Frascati we study kaonic atoms, taking advantage of the low-energy kaons produced in the Φ-meson decay. The low-energy kaon–nucleon interaction in kaonic hydrogen and kaonic deuterium can be investigated under favorable conditions. The DEAR (DAΦNE Exotic Atom Research) experiment at LNF delivered the most precise data on kaonic hydrogen up to now. DEAR and its follow-up experiment SIDDHARTA (Silicon Drift Detector for Hadronic Atom Research by Timing Application) are using X-ray spectroscopy of kaonic hydrogen and kaonic deuterium atoms to measure the strong interaction-induced shift and width of the ground state. From these quantities the isospin-dependent antikaon–nucleon scattering lengths can be determined, quantities useful for testing the understanding of chiral symmetry breaking in the strangeness sector. Within the SIDDHARTA project new X-ray detectors are being developed. We will use an array of large area silicon drift detectors (SDDs) having excellent energy resolution but also providing a timing capability that will result in a huge suppression of background and so overcome the precision limits of the former experiments.PACS Nos.: 36.10.k, 13.75.Jz, 32.30.Rj and 29.40.Wk

scholarly journals Kaonic atoms experiment at the DAΦNE collider by SIDDHARTA/SIDDHARTA-2

2020 ◽  
Author(s):  
Magdalena Skurzok ◽  
Abdollah Amirkhani ◽  
A. Baniahmad ◽  
M. Bazzi ◽  
D. Bosnar ◽  
...  
Keyword(s):  
Quantum Chromodynamics ◽  
Fast Response ◽  
Low Energy ◽  
Experimental Techniques ◽  
X Ray ◽  
Kaonic Atoms ◽  
Excellent Quality ◽  
The Future ◽  
Energy Quantum ◽  
Future Plans

The excellent quality kaon beam provided by the DA\PhiΦNE collider of LNF-INFN (Italy) together with SIDDHARTA/SIDDHARTA-2 new experimental techniques, as very precise and fast-response X-ray detectors, allow to perform unprecedented measurements on light kaonic atoms crucial for a deeper understanding of the low-energy quantum chromodynamics (QCD) in the strangeness sector. In this paper an overview of the main results obtained by the SIDDHARTA collaboration, as well as the future plans related to the SIDDHARTA-2 experiment, are discussed.

KAONIC HELIUM MEASUREMENTS IN THE SIDDHARTA EXPERIMENT

2011 ◽  
Vol 26 (03n04) ◽  
pp. 601-603
Author(s):  
◽  
D. L. SIRGHI ◽  
M. BAZZI ◽  
G. BEER ◽  
L. BOMBELLI ◽  
...  
Keyword(s):  
Energy Shift ◽  
High Energy ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
X Rays ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Theoretical Predictions ◽  
First Time ◽  
Hadronic Atom

The SIDDHARTA experiment (SIlicon Drift Detector for Hadronic Atom Research by Timing Application) had the aim to perform kaonic atoms X-ray transitions measurements, to better understand aspects of the low-energy QCD in the strangeness sector. The experiment combined the excellent low-energy kaon beam generated at DAΦNE, allowing to use gaseous targets, with excellent fast X-rays detectors: Silicon Drift Detectors. SIDDHARTA was installed on DAΦNE in autumn 2008 and took data till late 2009. Apart of the kaonic hydrogen and kaonic deuterium measurements, we have performed the kaonic helium transitions to the 2p level ( L -lines) measurements: for the first time in a gaseous target for helium4 and for the first time ever for kaonic helium3. The interest for such type of measurement was rather high, being it triggered by two reasons: the so-called "kaonic helium puzzle" (even if this was solved by KEK-PS E570 experiment, but a cross-check was useful) and some theoretical predictions of possible high energy shift (at the level of 10 eV). In this paper the preliminary results for the measurements to the 2p level ( L -series) for kaonic helium4 and kaonic helium3 are presented.

X-RAY SPECTROSCOPY OF KAONIC ATOMS AT DAΦNE

2011 ◽  
Vol 26 (03n04) ◽  
pp. 432-437
Author(s):  
◽  
A. ROMERO VIDAL ◽  
M. BAZZI ◽  
G. BEER ◽  
L. BOMBELLI ◽  
...  
Keyword(s):  
Precise Measurement ◽  
Kaonic Hydrogen ◽  
X Rays ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Level Shifts ◽  
Good Energy ◽  
Scattering Lengths ◽  
Atomic States ◽  
Future Plans

The SIDDHARTA experiment aims a precise measurement of K -series kaonic hydrogen x-rays and the first-ever measurement of the kaonic deuterium x-rays to determine the strong-interaction energy-level shifts and widths of the lowest lying atomic states. These measurements offer a unique possibility to precisely determine the isospin-dependent kaon-nucleon ( KN ) scattering lengths [1] which are directly connected with the physics of the KN interaction. Kaonic Helium transitions to the 2p level ( L -lines) were as well measured. The experiment has been performed at the DAΦNE e+e- collider which produces the Φ-resonance. The resulting low energy negative charged kaons, coming from the Φ decay, are well suited to be stopped efficiently in a high density gas target for producing such kind of atoms. As x-ray detectors, we employed 144 Silicon Drift Detectors developed especially for this experiment, having good energy resolution of 140 eV FWHM at 6keV and time resolution of sub-micro seconds. The data taking was completed in November 2009. In this paper, an overview of this experiment and preliminary results are presented, together with future plans.

scholarly journals Single-and multi-nucleon K− interactions with nuclei near threshold

2018 ◽  
Vol 181 ◽  
pp. 01008
Author(s):  
Eliahu Friedman ◽  
Avraham Gal
Keyword(s):  
Low Energy ◽  
Chiral Model ◽  
Kaonic Hydrogen ◽  
Nucleon Interaction ◽  
Kaonic Atom ◽  
Kaonic Atoms ◽  
The World ◽  
Reaction Data ◽  
Good Agreement ◽  
Near Threshold

Six recent SU(3) chiral-model EFT approaches to the K̅-nucleon interaction near threshold, constrained by K− p low-energy scattering and reaction data and by the kaonic hydrogen SIDDHARTA experiment, are used as input in kaonic atom calculations. Good agreement with the world-data on kaonic atoms is achieved with optical potentials built on the above models only when K̅N amplitudes are supplemented by a phenomenological multi-nucleon term. Comparing predictions with experimental single-nucleon absorption-at-rest fractions on nuclei, only two of the models together with their associated phenomenological term are acceptable. The information content of K−-nucleus data near threshold is discussed and the topic of deeply-bound kaonic atoms is re-visited.

scholarly journals X-ray Detectors for Kaonic Atoms Research at DAΦNE

2019 ◽  
Vol 4 (2) ◽  
pp. 42 ◽  
Author(s):  
Catalina Curceanu ◽  
Aidin Amirkhani ◽  
Ata Baniahmad ◽  
Massimiliano Bazzi ◽  
Giovanni Bellotti ◽  
...  
Keyword(s):  
National Laboratory ◽  
Kaonic Hydrogen ◽  
Silicon Drift Detector ◽  
Kaonic Atom ◽  
X Ray ◽  
Kaonic Atoms ◽  
Technological Advances ◽  
Kaonic Deuterium ◽  
First Time ◽  
Hadronic Atom

This article presents the kaonic atom studies performed at the INFN National Laboratory of Frascati (Laboratori Nazionali di Frascati dell’INFN, LNF-INFN) since the opening of this field of research at the DA Φ NE collider in early 2000. Significant achievements have been obtained by the DA Φ NE Exotic Atom Research (DEAR) and Silicon Drift Detector for Hadronic Atom Research by Timing Applications (SIDDHARTA) experiments on kaonic hydrogen, which have required the development of novel X-ray detectors. The 2019 installation of the new SIDDHARTA-2 experiment to measure kaonic deuterium for the first time has been made possible by further technological advances in X-ray detection.

scholarly journals Kaonic deuterium and low-energy antikaon-nucleon interaction

2018 ◽  
Vol 181 ◽  
pp. 01006
Author(s):  
Wataru Horiuchi ◽  
Tetsuo Hyodo ◽  
Wolfram Weise
Keyword(s):  
Schrodinger Equation ◽  
Energy Shift ◽  
Basis Functions ◽  
Low Energy ◽  
Level Shift ◽  
Kaonic Hydrogen ◽  
Nucleon Interaction ◽  
Kaonic Deuterium ◽  
Gaussian Basis Functions ◽  
Three Body

A new evaluation of the 1s level shift and width of kaonic deuterium is presented based on an accurate K̅ NN three-body calculation, using as input a realistic antikaon-nucleon interaction constrained by the SIDDHARTA kaonic hydrogen data. The three-body Schrödinger equation is solved with a superposition of a large number of correlated Gaussian basis functions extending over distance scales up to several hundred fm. The resulting energy shift and width of the kaonic deuterium 1s level are △E ≃ 0:67 keV and Γ ≃ 1.02 keV, with estimated uncertainties at the 10 % level.

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