Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session T04: DNP Award SessionInvited Live Prize/Award Undergrad Friendly
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Sponsoring Units: DNP Chair: Krishna Kumar, U. Mass |
Monday, April 19, 2021 3:45PM - 4:21PM Live |
T04.00001: Prize for a Faculty Member for Research in an Undergraduate Institution (2021): Research and Teaching with Cold Neutrons Invited Speaker: Gordon Jones Cold neutrons make an ideal laboratory for several areas of physics. On the fundamental side, the direction of neutron beta decay products can be directly compared to theory without the complication of nuclear structure. Angular correlations between the decay products can test the standard model, time reversal invariance, and the unitarity of the CKM matrix. On the more practical side, spin-polarized neutron beams can be scattered off materials to probe magnetic structures. The ability to polarize neutron beams using polarized $^3$He has come a long way toward becoming a standard option in neutron scattering. Working with neutrons involves a wide variety of techniques, giving students an accessible way to see the interplay between their theory courses and tightening bolts. I will walk through select experiments from the fundamental physics beamlines at the NIST reactor with an emphasis on student contributions and learning opportunities. [Preview Abstract] |
Monday, April 19, 2021 4:21PM - 4:57PM Live |
T04.00002: Maria Goeppert Mayer Award (2021): From quarks to hadrons and nuclei: machine learning for lattice field theory Invited Speaker: Phiala Shanahan With advances in supercomputing, we we have entered a quantitative era in our understanding of hadron and nuclear structure and interactions directly from the fundamental quark and gluon degrees of freedom of the Standard Model. The rapid progress in this field has been largely enabled by new algorithms, but for many key physics problems computational challenges still remain to achieve full systematic control. I will outline how new machine learning tools have the potential to enable currently-intractable calculations to reveal the physics of hadrons and nuclei from the Standard Model. [Preview Abstract] |
Monday, April 19, 2021 4:57PM - 5:33PM Live |
T04.00003: Tom W. Bonner Prize in Nuclear Physics (2021): The Fundamental Properties of the Neutron, or, Why Do We Keep Measuring the Same Things, Over and Over, Again Invited Speaker: Geoffrey Greene The fundamental properties of elementary particles, such as their masses, lifetimes, and magnetic moments are key parameters in many physical models and their precise values can be used to benchmark fundamental theories. As a result, it seems clear that continued improvement in the accuracy of their determinations is a worthwhile endeavor. Nonetheless it is fair to question the value of seeking improved accuracy simply ``for its own sake.'' In this talk, I will review the history of a few fundamental properties of the neutron and show how their experimental determinations have impacted theory, sometimes in unexpected ways. I will also briefly discuss the estimation of experimental uncertainty with particular attention to the disconcertingly large number of ``high sigma'' discrepancies that occur among different measurements. [Preview Abstract] |
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