[Jlab-seminars] FW: Accelerator Seminar: Michael Famiano 12/12/19 CC Auditorium 11am

[Stephanie Tysor]

From: Tristan Jones <tristan at jlab.org>
Sent: Monday, December 9, 2019 11:18 AM
To: Stephanie Tysor <stysor at jlab.org>
Subject: Accelerator Seminar: Michael Famiano 12/12/19 CC Auditorium 11am


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A Nuclear Physics Explanation of Biomolecular Homochirality: Theory and Explanation


December 12, 2019 • 11:00 a.m.
Cebaf Center, Auditorium

Dr. Michael Famiano
Professor of Physics
Western Michigan University

ABSTRACT

 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 pheonomenological 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 a polarized electron beam experiment.  Such an experiment will be discussed along with several problems and questions associated with it.

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Refreshments served at 10:45 a.m.

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