K-Nucleus scattering lengths from light kaonic atoms

1983 ◽  
Vol 78 (4) ◽  
pp. 471-484 ◽  
Author(s):  
P. M. Genslni
Keyword(s):  
Kaonic Atoms ◽  
Nucleus Scattering ◽  
Scattering Lengths

Theory of pion-nucleus scattering lengths

1977 ◽  
Vol 283 (4) ◽  
pp. 397-400 ◽  
Author(s):  
D. S. Koltun ◽  
F. Myhrer
Keyword(s):  
Nucleus Scattering ◽  
Scattering Lengths

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.

Theoretical Evaluation of Neutron-nucleus Scattering Parameters from Experimental Data in the 6 ≤ A ≤ 60 Mass Region

1998 ◽  
Vol 53 (10-11) ◽  
pp. 855-862 ◽  
Author(s):  
A. Aleksejevs ◽  
S. Barkanova ◽  
J. Tambergs ◽  
T. Krasta ◽  
W. Waschkowski ◽  
...  
Keyword(s):  
Cross Sections ◽  
Mass Region ◽  
Scattering Data ◽  
Matrix Formalism ◽  
Scattering Parameters ◽  
Theoretical Evaluation ◽  
Least Squares Fit ◽  
Optical Model Potential ◽  
Nucleus Scattering ◽  
Scattering Lengths

AbstractSystematic calculations of the neutron-nucleus scattering parameters at several neutron energies Ei < 2 keV have been performed for 37 isotopes (6Li,... 59Co) in the mass region of 6 ≤ A ≤ 60, using the large compilation of experimental neutron-nucleus scattering data obtained in Garching. In the first stage of these calculations, the s-wave potential scattering radius R’, the scattering lengths bcoh, b±, and the bound state parameters (Eb, Γγ , gΓ0n) have been calculated for each isotope, employing the general least squares fit (GLSQF) for the experimental and the corresponding theoretical values of the total neutron-nucleus cross sections σexptot(Ei) at several energies Ei, absorption cross sections σabs(Eo) and of the coherent scattering lengths bcoh. The theoretical expressions for these parameters were deduced on the basis of the usual S-matrix formalism with no assumption about the particular shape of the optical model potential. In the second stage of our calculations, the spherical Fiedeldey- Frahn optical potential was employed for the pure theoretical description or the above mentioned neutron-nucleus scattering characteristics. The results obtained have been analyzed and compared with the values deduced from measurements.

K−-Nucleus Scattering Lengths

1972 ◽  
Vol 29 (4) ◽  
pp. 240-243 ◽  
Author(s):  
Ryoichi Seki
Keyword(s):  
Nucleus Scattering ◽  
Scattering Lengths

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.

scholarly journals Towards a high-precision calculation for the pion-nucleus scattering lengths

2011 ◽  
Vol 47 (5) ◽  
Author(s):  
S. Liebig ◽  
V. Baru ◽  
F. Ballout ◽  
C. Hanhart ◽  
A. Nogga
Keyword(s):  
High Precision ◽  
Nucleus Scattering ◽  
Scattering Lengths

π−-Nucleus Scattering Lengths

1969 ◽  
Vol 23 (17) ◽  
pp. 1000-1003 ◽  
Author(s):  
Ryoichi Seki
Keyword(s):  
Nucleus Scattering ◽  
Scattering Lengths

Meson-nucleus scattering lengths and sigma-terms

1980 ◽  
Vol 60 (4) ◽  
pp. 221-233 ◽  
Author(s):  
P. M. Gensini
Keyword(s):  
Nucleus Scattering ◽  
Scattering Lengths
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