Parity And Time Reversal Violation In Compound Nuclear States And Related Topics: Proceedings Of The International
Parity And Time Reversal Violation In Compound Nuclear States And Related Topics: Proceedings Of The International

Author: Auerbach Naftali

Publisher: World Scientific

Published: 1996-11-06

Total Pages: 412

ISBN-13: 9814547395

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The book contains the Proceedings of the 2010 Conference of the Italian Systems Society. Papers deal with the interdisciplinary study of processes of changing related to a wide variety of specific disciplinary aspects. Classical attempts to deal with them, based on generalising approaches used to study the movement of bodies and environmental influence, have included ineffective reductionistic simplifications. Indeed changing also relates, for instance, to processes of acquisition and varying properties such as for software; growing and aging biological systems; learning/cognitive systems; and socio-economic systems growing and developing through innovations. Some approaches to modelling such processes are based on considering changes in structure, e.g., phase-transitions. Other approaches are based on considering (1) periodic changes in structure as for processes of self-organisation; (2) non-periodic but coherent changes in structure, as for processes of emergence; (3) the quantum level of description. Papers in the book study the problem considering its transdisciplinary nature, i.e., systemic properties studied per se and not within specific disciplinary contexts. The aim of these studies is to outline a transdisciplinary theory of change in systemic properties. Such a theory should have simultaneous, corresponding and eventually hierarchical disciplinary aspects as expected for a general theory of emergence. Within this transdisciplinary context, specific disciplinary research activities and results are assumed to be mutually represented as within a philosophical and conceptual framework based on the theoretical centrality of the observer and conceptual non-separability of context and observer, related to logically open systems and Quantum Entanglement. Contributions deal with such issues in interdisciplinary ways considering theoretical aspects and applications from Physics, Cognitive Science, Biology, Artificial Intelligence, Economics, Architecture, Philosophy, Music and Social Systems.

Parity and Time-reversal Violation in the Compound Nucleus
Parity and Time-reversal Violation in the Compound Nucleus

Author: Jonathan Curole

Publisher:

Published: 2023

Total Pages: 0

ISBN-13:

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The search for new sources of time reversal violation (TRV) is one of the highest intellectual priorities in nuclear/particle/astrophysics. New sources of CP/T violation beyond the Standard Model are needed to explain the observed matter-antimatter asymmetry of the universe. Theoretical progress to identify the large number of possible sources for TRV has made it very clear that any single type of TRV search cannot be equally sensitive to all possible mechanisms. It is therefore essential to pursue any experiments in different systems which can be realized with sufficient sensitivity to discover something new. Since TRV in the nucleon sector has not yet been observed, a nonzero observation in any nuclear system is of fundamental importance. TRV experiments involving p-wave neutron resonances in heavy nuclei are a sensitive system for such a search. The international collaboration NOPTREX proposes a TRV search through an asymmetry in polarized neutron transmission on epithermal p-wave resonances of polarized nuclei. Multiple papers have suggested that TRV in complex nuclei has the potential to be about 2 orders of magnitude more sensitive than the current limit from neutron electric dipole moment (EDM) experiments. A sensitive search for TRV in this process expands the variety of nuclear systems available to search for TRV parameters in various theories. This helps provide assurance that possible "accidental" cancellation of TRV effects due to unknown structural factors related to the strong interactions in particular systems can be avoided.

Study of Parity and Time Reversal Violation in Neutron-nucleus Interactions
Study of Parity and Time Reversal Violation in Neutron-nucleus Interactions

Author:

Publisher:

Published: 1994

Total Pages: 17

ISBN-13:

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The parity and time-reversal symmetries can be studies in neutron-nucleus interactions. Parity non-conserving asymmetries have been observed for many p-wave resonances in a compound nucleus and measurements were performed on several nuclei in the mass region of A∼100 and A∼230. The statistical model of the compound nucleus provides a theoretical basis for extracting mean-squared matrix elements from the experimental asymmetry data, and for interpreting the mean-squared matrix elements. The constraints on the weak meson-exchange couplings calculated from the compound-nucleus asymmetry data agree qualitatively with the results from few-body and light-nuclei experiments. The tests of time-reversal invariance in various experiments using thermal, epithermal and MeV neutrons are being developed.

Fundamental Physics With Pulsed Neutron Beams (Fppnb 2000)
Fundamental Physics With Pulsed Neutron Beams (Fppnb 2000)

Author: Christopher R Gould

Publisher: World Scientific

Published: 2001-06-05

Total Pages: 268

ISBN-13: 9814490768

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Low energy neutron beams are used to address many questions in nuclear physics, particle physics and astrophysics. The scientific issues include elucidating the nature of time reversal noninvariance; understanding the origin of the baryon asymmetry in the Universe; describing the weak interaction between quarks and between nucleons; understanding the origin of the elements in stellar and big bang nucleosynthesis.This book summarizes how spallation neutron sources work and discuss the advantages of pulsed beams in reducing systematic errors in precision measurements. It also describes recent breakthroughs in ultracold neutron production, together with the physics that will be addressed by the new generation of intense neutron sources.

Parity Violation In Atoms And In Polarized Electron Scattering
Parity Violation In Atoms And In Polarized Electron Scattering

Author: Marie-anne Bouchiat

Publisher: World Scientific

Published: 1999-07-13

Total Pages: 550

ISBN-13: 9814544086

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In the last few years there has been considerable progress in improving the accuracy of parity violation experiments in electron scattering at high energy and in atomic physics. Recent results are a challenge to the standard electroweak theory and our understanding of hadron structure. This book is an extensive review of the advances in this field. The theoretical framework is presented at a pedagogical level, experiments and future projects are reviewed, and the results and their interpretation are discussed in depth.