Please visit Jefferson Lab Event Policies and Guidance before planning your next event: https://www.jlab.org/conference_planning.

Apr 13 – 16, 2021
US/Eastern timezone

Determing the isospin Dependence of short-range correlations in Tritium and Helium-3 at Jefferson Lab

Apr 15, 2021, 2:50 PM
20m
Oral Presentation Nuclear PDFs

Speaker

Shujie Li (Lawrence Berkeley National Laboratory)

Description

In the atomic nucleus there exist a strong nucleon-nucleon (NN) interaction at short distance. When a two-nucleon pair are separated by r1,21.5 fm, they will interact strongly and and the pair obtains large back-to-back relative momenta. The probability of these short distance interactions is enhanced by the tensor force in isospin=0 neutron-proton (np) pairs. Under certain kinematic conditions, 4-momentum transfer Q2>1.3 GeV2, Bjorken x>1.4, Quasi-elastic electron scattering (QES) isolates those events producing nucleons with high initial momentum allowing the study this isospin dominance.
In 2018, the experiment E12-11-112 at Jefferson Lab measured inclusive electron cross sections of deuterium, tritium, and helium-3 at 0.4Q22.2GeV2. In the extracted 3H/2H (3He/2H) cross section ratios, we observed plateaus in the region of the NN short-range correlation (NN-SRC) dominant kinematics. The predicted scaling behavior of NN-SRC pairs in A=3 nuclei and in the deuteron is confirmed as is the isospin dominance of NN-SRC pairs. By comparing the mirror nuclei of 3H and 3He, we extracted the relative of of np to pp(nn) SRC pairs in the A=3 system.

Primary author

Shujie Li (Lawrence Berkeley National Laboratory)

Presentation materials