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Wyszukujesz frazę "Strong interaction" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Autorzy:
Shi, H.
Moskal, Paweł
Yoshida, C.
Sada, Y.
Cargnelli, M.
Friščić, I.
Scordo, A.
Bazzi, M.
Sirghi, D. L.
Piscicchia, K.
Del Grande, R.
Napolitano, F.
Abbene, L.
Buttacavoli, A.
Dulski, Kamil
Niedźwiecki, Szymon
Guaraldo, C.
Miliucci, M.
Zappettini, A.
Silarski, Michał
Curceanu, C.
Khreptak, Aleksander
Spallone, A.
Sgaramella, F.
Bosnar, D.
De Paolis, L.
Bettelli, M.
Carminati, M.
Manti, S.
Principato, F.
Skurzok, Magdalena
Doce, O. Vazquez
Zmeskal, J.
Iwasaki, M.
Onishi, H.
Toho, K.
Amsler, C.
Fiorini, C.
Tüchler, M.
Marton, J.
Borghi, G.
Sirghi, F.
Bragadireanu, M.
Iliescu, M.
Clozza, A.
Deda, G.
Opis:
Kaonic atoms are an extremely efficient tool to investigate the strong interaction at the low energy Frontier, since they provide direct access to the K$^{−}$N interaction at threshold, eliminating the necessity for extrapolation, unlike in the case of scattering experiments. During the 1970s and 1980s, extensive studies were performed on kaonic atoms spanning across a broad spectrum of elements in the periodic table, ranging from lithium to uranium. These measurements provided inputs and constraints for the theoretical description of the antikaon-nuclei interaction potential. Nevertheless, the existing data suffer from significant experimental uncertainties, and numerous measurements have been found to be inconsistent with more recent measurements that utilize advanced detector technology. Furthermore, there remain numerous transitions of kaonic atoms that have yet to be measured. For these reasons, a new era of kaonic atoms studies is mandatory. The DAΦNE electron-positron collider at the INFN Laboratory of Frascati (INFN-LNF) stands out as a unique source of low-energy kaons, having been utilized by Collaborations such as DEAR, SIDDHARTA, and AMADEUS for groundbreaking measurements of kaonic atoms and kaon-nuclei interactions. Presently, the SIDDHARTA-2 experiment is installed at DAΦNE, aiming to perform the first-ever measurement of the 2p → 1s x-ray transition in kaonic deuterium, a crucial step towards determining the isospin-dependent antikaon-nucleon scattering lengths. Based on the experience gained with the SIDDHARTA experiment, which performed the most precise measurement of the kaonic hydrogen 2p → 1s x-ray transition, the SIDDHARTA-2 setup is now fully equipped for the challenging kaonic deuterium measurement. In this paper, we present a comprehensive description of the SIDDHARTA-2 setup and of the first kaonic atoms measurements performed during the commissioning phase of the DAΦNE collider. We also outline a proposal for future measurements of kaonic atoms at DAΦNE beyond SIDDHARTA-2, which is intended to stimulate discussions within the broad scientific community performing research, directly or indirectly, related to this field.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Strong and Weak Interactions in Ghahramany’s Integrated Nuclear Binding Energy Formula
Autorzy:
Seshavatharam, U. V. S.
Lakshminarayana, S.
Tematy:
Strong interaction
Electroweak interaction
Ghahramany’s integrated nuclear binding energy formula
Nuclear drip lines
Pokaż więcej
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1839395.pdf  Link otwiera się w nowym oknie
Opis:
By modifying Ghahramany’s integrated nuclear binding energy formula with strong and weak interaction features, it is possible to approximate nuclear binding energy of isotopes with one unique energy coefficient and four terms. Considering even-odd corrections, shell corrections and other microscopic corrections, it seems possible to improve the accuracy. Based on our recent work and the proposed formulae, we are very confident to say that, quark structure helps in increasing nuclear binding energy and electroweak interaction helps in reducing nuclear binding energy.
Dostawca treści:
Biblioteka Nauki
Artykuł
Autorzy:
Zmeskal, Johann
Piscicchia, Kristian
Cargnelli, Michael
Czerwiński, Eryk
Skurzok, Magdalena
Kang, Xiaolin
Branchini, Paolo
Sirghi, Diana L.
Marton, Johann
Guaraldo, Carlo
Martini, Matteo
Scordo, Alessandro
Mandaglio, Giuseppe
Vazquez Doce, Oton
Oana Curceanu, Catalina
Fabbietti, Laura
Del Grande, Raffaele
Wycech, Sławomir
Selce, Andrea
Moskal, Paweł
Silarski, Michał
Opis:
The AMADEUS Collaboration conducts research aimed to experimentally investigate the low-energy K − hadronic interactions with light nuclei like hydrogen, helium, and carbon, in order to provide new constraints to the antikaon-nucleon strong interaction studies in the non-perturbative quantum chromodynamics regime. K − nuclear absorption, both at-rest and in-flight, are explored using the unique low-momentum and monochromatic kaon beam from the DAΦNE collider interacting with the KLOE detector components, a detector characterized by high acceptance and excellent position and momentum resolutions. This paper presents an overview of the AMADEUS results.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Stabilization of a fluid structure interaction with nonlinear damping
Autorzy:
Lasiecka, I.
Lu, Y.
Tematy:
fluid structure interaction
interface
Navier-Stokes equation
system of elasticity
feedback boundary control
strong stability
uniform stability
optimal control
passive damping
active damping
dynamic and static damping
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/206598.pdf  Link otwiera się w nowym oknie
Opis:
Asymptotic stability of finite energy solutions to a fluid-structure interaction with a static interface in a bounded domain Ω ∈ Rn, n = 2 is considered. It is shown that the undamped model subject to ”partial flatness” geometric condition on the in- terface produces solutions whose energy converges strongly to zero; while with a stress type feedback control applied on the interface of the structure, the model produces solutions whose energy is exponentially stable. An addition of a static damping on the interface produces solutions whose full norm in the phase space is exponentially stable. Without a static damping an interesting phenomenon occurs that steady state solutions (equilibria) might generate genuinely growing in time solutions. This is purely nonlinear phenomenon captured by newly developed techniques amenable to handle instability of steady state solutions arising from nonlinearity.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relation between adipose tissue and the musculoskeletal unit in a group of postmenopausal women
Autorzy:
Warzecha, Maja
Amarowicz, Jarosław
Madejska, Natalia
Opis:
Introduction: Involutional changes observed during aging increase rapidly in the postmenopausal period. These changes include body composition by affecting bone, muscle and fat tissue. A number of studies have investigated the mutual interaction between bone and muscle tissue, whereas adipose tissue had not been studied thoroughly. The aim of the present study was to assess the relation between fat tissue parameters and the musculoskeletal unit. Material and methods: The study was conducted in a group of 120 postmenopausal women with an average age of 69 years (59–81; SD 5.3). All women had been asked to complete a questionnaire (medical history) and underwent a total body composition analysis [bone mineral density (BMD)] testing (spine and/or neck) followed by a handgrip test. Results: The study revealed strong correlations between appendicular skeletal muscle mass index – appen.lean/height2, visceral adipose tissue area (VAT) and fat/mass/height2 index (r = 0.589 and 0.658 respectively; p < 0.001). The results were not supported by muscle strength (handgrip). The authors identified correlations between the bone parameters and adipose tissue but these were identified as weak or moderate (p < 0.05). Special emphasis should be placed on the relation between the trabecular bone score (TBS) and VAT area (r = –0.385, p < 0.001). Conclusions: There is a strong dependence between muscle and adipose tissues. Despite the fact that the increase in fat is correlated with the growth of muscle tissue, it is not accompanied by better quality of the muscle (handgrip). Bone microarchitecture is more related to VAT area than neck/spine BMD.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
    Wyświetlanie 1-6 z 6

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