お知らせ(2019.02.28)

ELPH seminar (Western Michigan Univ. M. Famiano氏 2019/4/18 15:00- )

皆さん

 

少々先ですが、418日に米国・Western Michigan University Michael Famiano 氏が議論のために来所することを受けて

ELPH seminar (+Sendai Nuclear Physics Colloquium)を開催することにしました。

古くからの知り合いである Michael Famiano 氏は、電子光理学研究センターで進めている我々の ULQ2 計画の話を聞いたそうで

低エネルギー電子ビームによる新しい研究の可能性を議論したいと仙台に来ることになりました。

関心のある方の参加を歓迎します。

 

須田利美

 

概要(PDF File)

 

講師: Professor Michael Famiano

         (Western Michigan University)

日時: 2019年4月18日(火)15:00 〜 16:30

場所: 電子光理学研究センター三神峯ホール

題目:  A Nuclear Physics Explanation of Biomolecular Homochirality: Theory and Experiment

[講演要旨]

  The discovery of bio-molecules in meteorites with an excess of one chiral state has created one of the biggest questions in science today. That is, what is the origin of bio-molecular homochirality? Studies of this question are highly interdisciplinary, and while several phenomenological models exist, we examine the relationship between fundamental symmetries at the particle level and the macroscopic formation of bio-molecules. A model has been developed which couples fundamental interactions with the formation of molecular chirality. In this magneto-chiral model atomic nuclei bound in amino acids interact via the weak interaction in stellar environments. Nuclei are coupled to the molecular geometry (chirality) via the shielding tensor – the same interaction responsible for NMR identification.

Interactions with leptons can then selectively destroy one chiral state over the other. Possible sites are proposed in which this model may exist. It may be possible to test the formation of chiral bio-molecules in space in an electron beam experiment at a facility much like the one at Tohoku University. Such an experiment will be discussed along with several problems and questions associated with it.

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