Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session D15: Mini-Symposium: Short Range Nuclear Structure II
3:30 PM–5:06 PM,
Saturday, April 13, 2019
Sheraton
Room: Plaza Court 4
Sponsoring
Unit:
DNP
Chair: Or Hen, MIT
Abstract: D15.00006 : Nuclear photoabsorption cross section ratio R = σL/σT in A=3 nuclei
4:54 PM–5:06 PM
View Presentation Abstract
Presenter:
Tyler T Kutz
(Stony Brook University)
Author:
Tyler T Kutz
(Stony Brook University)
Collaboration:
Tritium experiments group (Jefferson Lab Hall A)
Charged lepton-nuclear deep inelastic scattering cross sections depend on dimensionless structure functions, F1 and F2. These structure functions can be expressed in terms of σL and σT, the nuclear photoabsorption cross sections for longitudinally and transversely polarized virtual photons, respectively. The ratio R = σL/σT is critical to obtaining the F2 structure function (or structure function ratio) from a measured nuclear cross section (or cross section ratio). Although R has only been measured for a few nuclei, assumptions about R are often made when analyzing nuclear cross section data. This is relevant to a series of experiments completed in Jefferson Lab’s Hall A during 2018. The experiments used a novel tritium target, alongside hydrogen, deuterium, and helium targets, to obtain structure function ratios from measured cross section ratios (assuming nuclear independence of R). Using a Rosenbluth separation style technique, it may be possible to use this data to obtain model-independent extractions of ΔR, the difference in R between various pairs of nuclei. This would not only add to the global dataset of R measurements, but could verify the assumptions made by the experiments in transitioning from cross sections to structure functions.
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