[Jlabsa_gs] **Reminder** Pizza Seminar - Wednesday, December 19, 2018

[Jodi Patient]

Jefferson Lab's Graduate Student and Post-Doc Association Wiki:
  https://gspda.jlab.org/wiki/index.php/Main_Page

               Please RSVP to:  patient at jlab.org by COB on December 17.


                                 Wednesday, December 19, 2018

                                                    ***F113***

                                                 12:00-1:00 pm

                                            "The Proton Radius"

                                                             OR

              "How I Stopped Worrying and Learned to Love Uncertainty"


                                         Douglas W. Higinbotham



                                                       Jefferson Lab

Abstract:  In 2010, a muonic Lamb shift experiment rocked the atomic and nuclear

physics communities by extracting a proton radius that was significantly smaller

than previously determined. This new result launched many new electron-scattering

and atomic Lamb shift experiments to discover the source of the difference: new

physics or simply problems with the older measurements. I will review some of the

recent proton radius results as well as present a discussion of the fundamental

concepts of fitting experimental data: concepts that are at the heart of machine

learning algorithms.


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