[Jlab-seminars] Today's Physics Seminar: Scott Barcus; Extraction and Parametrization of Isobaric Tri-nucleon Elastic Cross Sections and Form Factors

[Stephanie Tysor]

Physics Seminar
Scott Barcus

The College of William & Mary


Extraction and Parametrization of Isobaric Tri-nucleon Elastic Cross Sections and Form Factors

Abstract:


By mining data from Jefferson Lab Hall A experiment E08-014 a new measurement of the 3He elastic cross section at Q2 = 34 fm-2 was extracted. This new data point falls approximately halfway between the first and second diffractive minima of the 3He form factors. Along with recent high Q2 elastic cross section measurements from JLab, this new point improves our knowledge of the cross section at large momentum transfers. The new high Q2 data motivate a re-analysis of the 3He elastic cross section world data and promise an improved understanding of the magnetic form factor in particular. This presentation will discuss the new cross section measurement as well as modern sum of Gaussians fits to the updated 3He world data in addition to its mirror nuclei 3H. Updated charge and magnetic form factors from these fits will be discussed as well as charge radii. The results will be contrasted with previous t results and current theoretical predictions.




Tuesday, February 5, 2019
2:00pm
CEBAF Center F113


Stephanie Tysor
Thomas Jefferson National Accelerator Facility
Physics Division
Hall A Administrative Assistant
(office)757-269-6005<callto:757-269-6005> (fax)757-269-5235<callto:757-269-5235>

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