Conveners
Tuesday: Fundamental physics
- Wojciech Wiślicki (NCBJ)
- Avraham Gal (Racah Institute of Physics, The Hebrew University of Jerusalem)
Tuesday: Fundamental physics: Kaonic atoms
- Eulogio Oset (University of Valencia)
- Satoru Hirenzaki (Nara Women's University)
New cutting edge technology allows obtaining the complete information from high energetic photons undergoing Compton scatterings. This in turn enables for the first time to read out the quantum information from the molecular environment for which recent pilot studies suggest that this new kind of information plays a role in detection of cancer in humans.
The fundamental interaction of positron with matter and the mechanism of positronium formation are briefly introduced. Then, recent advances in fundamental experiment with many positrons bunched beam for the production of positronium in vacuum are presented: formation of antihydrogen by charge exchange, excitation of positronium in long lived states. Planned running experiment with long lived...
A small difference between the energies of the para-positronium (p-Ps) and ortho-positronium (o-Ps) states suggests the possibility of the superposition of p-Ps and o-Ps during the formation of positronium (Ps) from pre-Ps. It is shown that such a superposition decoheres in the basis of p-Ps and o-Ps. The decoherence time scale estimated here motivates a correction in the precise analysis of...
We analyze the Heisenberg and Mandelstam-Tamm time-energy uncertainty relations
and we show that within the Quantum Mechanics of Schroedinger and von Neumann,
contrary to the position-momentum uncertainty relation, these
relations can not be considered as universally valid.
We present the puzzle of the neutron lifetime, according to which different measurements (bottle and beam methods) deliver different lifetimes. In particular, the bottle method delivers a lifetime which is 8 s shorter than the beam method. At present, the mismatch is at the 4 sigma level. If the mismatch is not due to (yet undiscovered) systematic errors, one should search for theoretical...
Low energy nuclear reactions (LENR) are considered based on dineutron formation in the outgoing channel of a neutron induced nuclear reaction on 159Tb. Due to the dineutron presence and subsequent decay, either it is itself, or it`s products may react with 158Tb nuclei to transform them directly or sequently into 160Tb. Accumulation of 160Tb is assumed from purely strong or weak-strong...
The standard scheme of several tests of the Pauli Exclusion Principle in bulk matter - both in the experiment and in the subsequent data analysis - has long been based on the seminal paper by Ramberg and Snow (RS) (Phys. Lett. B238, 439 (1990)). The ideas exposed in that paper are so simple and immediate that they have long gone unchallenged. However, while some of the underlying...
The VIP-2 at the Underground Gran Sasso Laboratory (LNGS) experiment aims to perform high precision tests of the Pauli Exclusion Principle for electrons. The spin-statistics connection can be only demonstrated within Quantum Field Theory, hence experimental evidence of even a tiny violation of the PEP would be an indication of physics beyond the Standard Model. The method consists in...
Nuclear shapes like triaxial, octopole and tetrahedral - with underlying symmetries and associated conserved quantities - have drawn considerable interest during recent years. Chiral symmetry (handedness) in triaxial nuclei manifests itself in two degenerate sets of energy levels. Their reduced transition probabilities B(M1) and B(E2) are the critical observables [1], obtainable from the...
Exotic atom X-ray research offers atomic level shifts and widths for "lower levels" and widths for "upper levels". Understanding of lower levels is usually difficult as due to larger nuclear–atomic overlap, many body phenomena are involved.
In the upper levels the orbital hadron just grazes the nucleus and the physics is reduced essentially to single hadron – nucleon collisions. Moreover...
Studies with kaonic atoms offer the unique opportunity to perform experiments at vanishing relative energies between the antikaon and the nucleon, because their atomic binding energies are in the keV range, far below the lowest energies of extracted beams for scattering experiments. Specially, kaonic hydrogen atoms offer an ideal framework to study strong-interaction processes, which will give...
The precision of the charged kaon mass is much worse, an order of magnitude, than the precision of the charged pion mass. Beside the interest in its intrinsic value, the uncertainty in the kaon mass has large influence on the K-N scattering lengths and through them on the kaon-nucleon sigma terms, which reflect the degree of chiral symmetry breaking.
Nowadays, the charged kaon mass can be most...
There are long-standing arguments on a meson-baryon aspect of the Lambda(1405) resonance. In particular, pole structure of Lambda(1405) has been intensively discussed. Since Lambda(1405) is located below the antikaon-nucleon (KbarN) mass threshold, it is impossible to form Lambda(1405) directly in the KbarN scattering in free space. Therefore, we carried out an experiment to measure spectral...
A high-resolution X-ray spectrometer based on an array of novel superconducting micro-calorimeters is applied to an experiment of hadron physics for the first time. The scientific campaign of the experiment was completed in 2018. The fresh result from the measurement will be presented in this symposium.
The strong interaction between an anti-kaon and a nucleon/nucleus is known to be strongly...
The AMADEUS collaboration aims to provide information on the $\bar{\mathrm{K}}$-nucleon/nuclei interaction in the low-energy regime. The investigation of the antikaon dynamics in nuclear medium is fundamental for the understanding of the non-perturbative QCD in the strangeness sector, with implications going from nuclear physics to astrophysics. Hyperon-nucleon/nuclei (YN) and hyperon-pion...
The investigation of hypernuclei with strangeness $-2$ is one of the hot topics in hypernuclear physics, and the advent of an intense kaon beam at J-PARC has enabled us to explore them in detail. We have proposed a new experiment to produce probably the lightest double-$\Lambda$ hypernucleus, ${}^{\ \ \ \ 5}_{\Lambda\Lambda}\mathrm{H}$. A substantial fraction of a $\Xi$-hypernucleus, ${}^{...
This contribution reviews recent studies of $K^-$ and $\eta$ nuclear quasi-bound states performed by the Jerusalem-Prague Collaboration using potentials derived from state-of-the-art chirally motivated meson-baryon coupled-channel interaction models.
Energy and density dependence of the scattering amplitudes, implications of self-consistent treatment, as well as the role of meson...
