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Wyświetlanie 1-10 z 27
Tytuł:
Strongest constraint on the parastatistical Quon model with the VIP-2 measurements
Autorzy:
Curceanu, Catalina
Zmeskal, Johann
Piscicchia, Kristian
Cargnelli, Michael
Sirghi, Diana Laura
Sgaramella, Francesco
Marton, Johann
Guaraldo, Carlo
Iliescu, Mihail
Bragadireanu, Mario
Napolitano, Fabrizio
Sirghi, Florin
Laubenstein, Matthias
Bazzi, Massimiliano
Porcelli, Alessio
Scordo, Alessandro
Clozza, Alberto
Manti, Simone
Paolis, Luca De
Del Grande, Raffaele
Bortolotti, Nicola
Opis:
The spin-statistics theorem leads to Pauli’s Exclusion Principle (PEP), the basis of the stability of matter and many other phenomena relevant to physics, astrophysics, cosmology, and even biology. Possible violations of the PEP (PEPV) have been searched for since its inception; they may come from various Beyond Standard Model descriptions, including Non-Commutative Quantum Gravity models and extensions of the Quantum Field Theory, which must follow the Messiah-Greenberg Super-Selection (MGSS) rule and lead to the Quon description of the spin-statistic symmetries: the parastatstics. Efforts to search for a PEPV are not new; however, they have typically measured those cases without respecting MGSS. VIP (VIolation of the Pauli exclusion principle) first and its successor VIP-2, both sited in the “Gran Sasso underground laboratory,” aimed to set the most stringent limit for the non-Paulian transition following the MGSS rule. After two years of data with VIP-2 and better modeling of the electron-atom interaction, we present the most stringent upper limit of the probability of PEP violation for this case ($\beta^{2} / 2 < 2.47 \times 10^{-43}$), thus completing the state-of-the-art of all possible PEPV cases, and the consequent constraint to the Quon description: $1 + q < 4.94 \times 10^{-43}$.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
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:
Studies of low-energy K$^{-}$-nucleus/nuclei interactions with light nuclei by AMADEUS
Autorzy:
Clozza, Alberto
Iliescu, Mihai
Spallone, Antonio
Guaraldo, Carlo
Curceanu, Catalina
Vazquez Doce, Oton
Silarski, Michał
Zmeskal, Johann
Sirghi, Diana Laura
Levi Sandri, Paolo
Del Grande, Raffaele
Piscicchia, Kristian
Scordo, Alessandro
Sirghi, Florin
Bazzi, Massimiliano
Bosnar, Damir
Moskal, Paweł
Ramos, Angels
Marton, Johann
Cargnelli, Michael
Skurzok, Magdalena
Wycech, Sławomir
De Paolis, Luca
Fabbietti, Laura
Bragadireanu, Mario
Miliucci, Marco
Opis:
The AMADEUS Collaboration aims to provide unique experimental constraints to the antikaon-nucleon strong interaction in the regime of nonperturbative QCD. The K$^{-}$ nuclear captures, both at-rest and in-flight, are studied using the monochromatic low-momentum kaon beam (p$_{K}$ ∼ 120 MeV/c) produced at the DAΦNE collider, interacting with the KLOE detector materials. The studies are performed by reconstructing the hyperon-pion and hyperonnucleon final states. In this work a brief description of AMADEUS results for Λ$\pi^{-}$ and Λp final states is presented.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
High precision kaonic deuterium measurement at the DAΦNE collider : the SIDDHARTA-2 experiment and the SIDDHARTINO run
Autorzy:
Curceanu, Catalina
Zmeskal, Johann
Niedźwiecki, Szymon
Piscicchia, Kristian
Cargnelli, Michael
Sgaramella, Francesco
Skurzok, Magdalena
Marton, Johann
Sirghi, Diana
Tuchler, Marlene
King, Pietro
Guaraldo, Carlo
Iliescu, Mihail
Bragadireanu, Mario
De Paolis, Luca
Spallone, Antonio
Levi Sandri, Paolo
Napolitano, Fabrizio
Sirghi, Florin
Bazzi, Massimiliano
Scordo, Alessandro
Vazquez Doce, Oton
Clozza, Alberto
Deda, Griseld
Shi, Hexi
Bosnar, Damir
Del Grande, Raffaele
Iwasaki, Masahiko
Moskal, Paweł
Miliucci, Marco
Carminati, Marco
Silarski, Michał
Fiorini, Carlo
Opis:
The kaonic deuterium 2p → 1s transition X-ray measurement, a fundamental information needed for a deeper understanding of the Quantum ChromoDynamics (QCD) in the strangeness sector, is still missing. The SIDDHARTA-2 collaboration is now ready to achieve this unprecedented result thanks to the dedicated experimental apparatus that will allow to obtain the values of the kaonic deuterium K-transitions with a precision comparable to the most precise kaonic hydrogen measurement to-date performed by SIDDHARTA in 2009. Both the kaonic hydrogen and kaonic deuterium X-ray spectroscopy measurements of the de-excitation towards the fundamental level are a direct probe on KN interaction at threshold, as opposed to the scattering experiments which need an extrapolation to zero energy. Combining these results through the Deser-Truemann like formula, the isospin-dependent kaon-nucleon scattering lengths can be obtained in a model-independent way. The SIDDHARTA-2 setup is presently installed at the DAΦNE (Double Annular Φ Factory for Nice Experiments) collider of Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali di Frascati and it is ready to perform the challening kaonic deuterium measurement. This paper provides an overview on the SIDDHARTA-2 experimental apparatus and a preliminary result of the kaonic helium run, preparatory for the SIDDHARTA-2 data taking campaign, is also presented.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Wyświetlanie 1-10 z 27

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