Happy Birthday, Ultra-Cold Neutron!
| Autor: | Hartmut Lemmel, Tobias Jenke, Hartmut Abele |
|---|---|
| Přispěvatelé: | Institut Laue-Langevin (ILL), ILL |
| Rok vydání: | 2019 |
| Předmět: |
fundamental constant: Planck
QC1-999 FOS: Physical sciences Cosmological constant General Relativity and Quantum Cosmology (gr-qc) [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences resonance: acoustic General Relativity and Quantum Cosmology dark matter Metric expansion of space symbols.namesake Theoretical physics Baryon asymmetry High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences CP: violation resonance: transition Planck Einstein Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Physics cosmological constant Spacetime 010308 nuclear & particles physics Fundamental interaction High Energy Physics - Phenomenology n: mass [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] baryon: asymmetry symbols [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] Preferred frame mass: gravitation higher-dimensional expansion: acceleration gravitation: local |
| Zdroj: | 'EPJ Web of Conferences ', vol: 219, pages: 01001-1-01001-9 (2019) EPJ Web Conf. International Workshop on Particle Physics at Neutron Sources 2018 International Workshop on Particle Physics at Neutron Sources 2018, May 2018, Grenoble, France. pp.01001, ⟨10.1051/epjconf/201921901001⟩ EPJ Web of Conferences, Vol 219, p 01001 (2019) |
| DOI: | 10.48550/arxiv.1909.03349 |
| Popis: | What is driving the accelerated expansion of the universe and do we have an alternative for Einstein's cosmological constant? What is dark matter made of? Do extra dimensions of space and time exist? Is there a preferred frame in the universe? To which extent is left-handedness a preferred symmetry in nature? What's the origin of the baryon asymmetry in the universe? These fundamental and open questions are addressed by precision experiments using ultra-cold neutrons. This year, we celebrate the 50th anniversary of their first production, followed by first pioneering experiments. Actually, ultra-cold neutrons were discovered twice in the same year, once in the eastern and once in the western world. For five decades now research projects with ultra-cold neutrons have contributed to the determination of the force constants of nature's fundamental interactions, and several technological breakthroughs in precision allow to address the open questions by putting them to experimental test. To mark the event and tribute to this fabulous object, we present a birthday song for ultra-cold neutrons with acoustic resonant transitions, which are based solely on properties of ultra-cold neutrons, the inertial and gravitational mass of the neutron, Planck's constant, and the local gravity. We make use of a musical intonation system that bears no relation to basic notation and basic musical theory as applied and used elsewhere but addresses two fundamental problems of music theory, the problem of reference for the concert pitch and the problem of intonation. Comment: This article covers the music part of a lecture given at the International Workshop on Particle Physics at Neutron Sources, PPNS, in Grenoble/France in May 2018 with a composition on the occasion of the 50th anniversary of the first production of ultra-cold neutrons |
| Databáze: | OpenAIRE |
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