Neutrino Physics: from Historical Perspective to Future Challenges

Dear Colleagues,

The neutrino, a fundamental elementary particle of nature, was born out of necessity to keep the conservation of energy principle in observed Beta decays. Although neutrinos are not mass-less like the photon of light, they have a very special property of their own, they can pass through matter completely un-hindered. It was initially though these elusive particles might never be able to be observed. Eventually they were directly seen, or at least their byproducts of the neutrino conversion observed. This started a series of very difficult experiments to study and measure the detailed property of the neutrino. All of these experiments, some of which are still on-going, are attempting to answer very perplexing questions of nature. Why does the neutrino oscillate between neutrino species? Can the neutrino oscillation between matter and anti-matter account for the mystery of why the Universe is made solely of matter and no anti-matter, even though both were created equally in the Big Bang? What role does the neutrino play in the mysterious dark matter and dark energy perplexing question in the Universe? Other simple, although difficult to measure, properties of the neutrino such as their mass and spin are only able to be done by experiments so complex that they seem almost un-achievable without heroic efforts.

The main aim of this Special Issue is to highlight these questions, from the historical proposition that formed the neutrino, the many experiments that first explained unexpected properties in particle physics related to the neutrino, and the many unanswered questions being studied in ongoing and future neutrino experiments. Researchers in this field are welcome to propose state-of-the-art reviews, experimental or theoretical research papers, short communications all to be published in this Special Issue of Symmetry.

Prof. Nickolas Solomey
Guest Editor

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